J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX...

78
BENTHIC SAMPLING IN CATHLAMET BAY, OREGON -- 1984 by Robert L. Emmett George T. McCabe, Jr. Travis C. Coley Robert J. McConnell and William D. Muir Report of Research Financed by U. S. Army Corps of Engineers (Contract DACW57-84-F-0348) and Coastal Zone and Estuarine Studies Northwest and Alaska Fisheries Center National Marine Fisheries Service National Oceanic and Atmospheric Administration 2725 Montlake Boulevard East Seattle, Washington 98112 October 1986

Transcript of J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX...

Page 1: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

BENTHIC SAMPLING IN CATHLAMET BAY

OREGON -- 1984

by

Robert L Emmett George T McCabe Jr

Travis C Coley Robert J McConnell

and William D Muir

Report of Research

Financed by

U S Army Corps of Engineers (Contract DACW57-84-F-0348)

and

Coastal Zone and Estuarine Studies Northwest and Alaska Fisheries Center

National Marine Fisheries Service National Oceanic and Atmospheric Administration

2725 Montlake Boulevard East Seattle Washington 98112

October 1986

Table of Contents

Page

INTRODUCTION bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 1

METHODS bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 1

RESULTS bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 7

DISCUSSION bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 7

ACKNOWLEDGMENTS bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 10

LITERATURE CITED bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 10

APPENDIX A--Descriptive summary of benthic invertebrate data

collected in Cathlamet Bay Oregon during March through

September 1984

APPENDIX B--Sediment particle size and organic content of the

Cathlamet Bay benthic invertebrate sites during March

through September 1984

INTRODUCTION

Interest has been shown in the possibility of a deep draft navigational

channel from the mouth of the Col umbia River to either Astoria or Tongue

Point Oregon However deepening the channel may increase the amount and

the duration of saltwater intrusions into Cathlamet Bay Cathlamet Bay is

presently a freshwater embayment saline water only enters the bay when

river flows are reduced (primarily summer and fall)

Cathlamet Bay supports large populations of invertebrates including

the gammarid amphipod Corophium salmonis an important food for many fish

species in the estuary (McCabe et al 1983) Many fishes including

juvenile salmonids feed in Cathlamet Bay It is possible that alterations

of salinity regimes in Cathlamet Bay due to channel deepening would reduce

Corophium and other invertebrate populations subsequently adversely

affecting the use of the bay by feeding fishes

In 1984 the Portland District of the Us Army Corps of Engineers

contracted with the National Marine Fisheries Service in a cooperative

effort to provide additional biological information on the existing benthic

invertebrate and fish communities in Cathlamet Bay The research findings

pertaining to the benthic invertebrate data are being presented in this data

report the fish data are presented in a separate report

METHODS

Thirteen benthic sampling surveys were conducted at approximately 2shy

week interval s from 13 March through 14 September 1984 Initial benthic

invertebrate and sediment samples were collected at Stations 18 48 54 and

57 (Fig 1 Table 1) Due to extremely low benthic invertebrate densities

at Stations 48 54 and 57 these stations were replaced with nearby

1

58 amp

c ~

lt ~ 57 57 - +$ ampmiddotJ~EE~L

IS Yamp1 sf~18 l) bull bull t - amp ~ ~~

$+ ~BAYCATHLAMET

~~

OREGON

1N

5 o KM

~GRAYS BAY WASHINGTONcgt

~ ~

amp - Core sampler

$ - Purse seine +- Trawl

I ) o MI

N

Figure l--Locations and station numbers of fish and invertebrate sampling sites in

Cathlamet Bay

Table 1--Geographic locations of the benthic sampling stations in

Cathlamet Bay

Geographic location Station (Latitude and Longitude) Site Description

18 46 1234 N 123 4252 W Adjacent to Green Dolphin 3 at Wend of North Channel

45 46 1128 N 123 4414 W Center of old Marishytime Basin 600 m N of Corps of Enginshyeers dock

48a 46 1053 N 123 4409 W Adjacent to Can 7 off SW end of Lois Island in South Channel

46 1053 N 123 38 41 W Adj acent to Svensen Island piling jetty W of Red Dolphin 12A

55 46 11 17 N 123 3800 W Adjacent to Red Dolphin 14 at SW end of Minaker Island

46 1300 N 123 3809 W 50 m N of Seal Island in Woody Island Channel

58 46 1354 N 123 4010 W Adjacent to Can 5 in Woody Island Channel [after can was moved (18 July) approxshyimately 300 m Wof can]

a Stations which were replaced during Survey 3

3

stations known to have higher densities --45 55 and 58 respectively

after Survey 2 Higher benthic invertebrate densities would provide better

statistically identifiable relationships between densities and salinity As

a result of the changes in sampling stations only samples from Station 18

were analyzed for Survey 2 (5 April 1984)

Benthic samples were collected by SCUBA divers using a coring device

The sampler was constructed of 385-cm (inside diameter) PVC pipe which

penetrated 15 cm into the sediment thereby collecting a 924 cm3 sediment

sample (Fig 2) The coring device was operated as follows 1) the sampler

was filled with water on the boat to aid in diver descent 2) on the bottom

the diver removed the bottom cap and pushed the sampler into the sediment

until it stopped at the plexiglass plate (15 cm) and 3) the diver placed

his thumb on the top opening (forming a suction) removed the coring device

from the sediment and replaced the bottom cap All samples were taken

within the confines of a square meter aluminum irame

On the boat samples were washed through a 025-mm mesh screen placed

into labeled jars and fixed and preserved in a 4 formaldehyde solution

that contained rose bengal (a protein stain) At the laboratory samples

were washed of the formaldehyde sol ution and sorted with the aid of a 15X

dissecting microscope Invertebrates were identified to the lowest

practical taxon and counted

Initially 16 benthic cores were taken 15 to be used for benthic

invertebrate analysis and 1 for sediment analysis Subsequent statistical

analysis revealed 10 benthic invertebrate cores were sufficient to

adequately describe the benthic communities So after Survey 4

(1 August 1984) 11 benthic cores were collected per station

4

Opening

Top cap

Plexiglass disc c====tt====tt===J

PVC tubing

Bottom cap

1Scm String

Figure 2--Description of PVC benthic invertebrate sampling device

5

Station number date depth bottom salinity and temperature (taken

with a Beckman RS5-3 salinometer and probe1) sample size total numbers

frequency of occurrence and mean number 1m2 are presented in the Results

Besides the above H Shannon-Weaver diversity function (Shannon and Weaver

1963) SD Simpson diversity value (Simpson 1949) SR species richness

(Margalef 1958) and J species evenness value (Pielou 1966) were

calculated The following formulas were used s

1) H= - L Pi 10g2 Pii=1

where Pi= the proportion of individuals belonging to the ith

species

S = number of species s

2) SD= 1 - L Pi2 i=1

where Pi= the proporti on of individual s be longing to the i I th

species

3) SR= (S - l)loge N

where S= the number of species at the station

N= the total number of individuals at the station

4) J= H Ilog2 S

where H= the Shannon-Weaver diversity value

S = the number of species

Sediments were analyzed by seiving those particles lt 00625 mm were

considered the silt-clay fraction Organic content was determined by

burning at 550degC for 24 h

II Reference to trade names does not imply endorsement by National Marine Fisheries Service NOAA

6

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 2: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Table of Contents

Page

INTRODUCTION bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 1

METHODS bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 1

RESULTS bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 7

DISCUSSION bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 7

ACKNOWLEDGMENTS bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 10

LITERATURE CITED bullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbullbull 10

APPENDIX A--Descriptive summary of benthic invertebrate data

collected in Cathlamet Bay Oregon during March through

September 1984

APPENDIX B--Sediment particle size and organic content of the

Cathlamet Bay benthic invertebrate sites during March

through September 1984

INTRODUCTION

Interest has been shown in the possibility of a deep draft navigational

channel from the mouth of the Col umbia River to either Astoria or Tongue

Point Oregon However deepening the channel may increase the amount and

the duration of saltwater intrusions into Cathlamet Bay Cathlamet Bay is

presently a freshwater embayment saline water only enters the bay when

river flows are reduced (primarily summer and fall)

Cathlamet Bay supports large populations of invertebrates including

the gammarid amphipod Corophium salmonis an important food for many fish

species in the estuary (McCabe et al 1983) Many fishes including

juvenile salmonids feed in Cathlamet Bay It is possible that alterations

of salinity regimes in Cathlamet Bay due to channel deepening would reduce

Corophium and other invertebrate populations subsequently adversely

affecting the use of the bay by feeding fishes

In 1984 the Portland District of the Us Army Corps of Engineers

contracted with the National Marine Fisheries Service in a cooperative

effort to provide additional biological information on the existing benthic

invertebrate and fish communities in Cathlamet Bay The research findings

pertaining to the benthic invertebrate data are being presented in this data

report the fish data are presented in a separate report

METHODS

Thirteen benthic sampling surveys were conducted at approximately 2shy

week interval s from 13 March through 14 September 1984 Initial benthic

invertebrate and sediment samples were collected at Stations 18 48 54 and

57 (Fig 1 Table 1) Due to extremely low benthic invertebrate densities

at Stations 48 54 and 57 these stations were replaced with nearby

1

58 amp

c ~

lt ~ 57 57 - +$ ampmiddotJ~EE~L

IS Yamp1 sf~18 l) bull bull t - amp ~ ~~

$+ ~BAYCATHLAMET

~~

OREGON

1N

5 o KM

~GRAYS BAY WASHINGTONcgt

~ ~

amp - Core sampler

$ - Purse seine +- Trawl

I ) o MI

N

Figure l--Locations and station numbers of fish and invertebrate sampling sites in

Cathlamet Bay

Table 1--Geographic locations of the benthic sampling stations in

Cathlamet Bay

Geographic location Station (Latitude and Longitude) Site Description

18 46 1234 N 123 4252 W Adjacent to Green Dolphin 3 at Wend of North Channel

45 46 1128 N 123 4414 W Center of old Marishytime Basin 600 m N of Corps of Enginshyeers dock

48a 46 1053 N 123 4409 W Adjacent to Can 7 off SW end of Lois Island in South Channel

46 1053 N 123 38 41 W Adj acent to Svensen Island piling jetty W of Red Dolphin 12A

55 46 11 17 N 123 3800 W Adjacent to Red Dolphin 14 at SW end of Minaker Island

46 1300 N 123 3809 W 50 m N of Seal Island in Woody Island Channel

58 46 1354 N 123 4010 W Adjacent to Can 5 in Woody Island Channel [after can was moved (18 July) approxshyimately 300 m Wof can]

a Stations which were replaced during Survey 3

3

stations known to have higher densities --45 55 and 58 respectively

after Survey 2 Higher benthic invertebrate densities would provide better

statistically identifiable relationships between densities and salinity As

a result of the changes in sampling stations only samples from Station 18

were analyzed for Survey 2 (5 April 1984)

Benthic samples were collected by SCUBA divers using a coring device

The sampler was constructed of 385-cm (inside diameter) PVC pipe which

penetrated 15 cm into the sediment thereby collecting a 924 cm3 sediment

sample (Fig 2) The coring device was operated as follows 1) the sampler

was filled with water on the boat to aid in diver descent 2) on the bottom

the diver removed the bottom cap and pushed the sampler into the sediment

until it stopped at the plexiglass plate (15 cm) and 3) the diver placed

his thumb on the top opening (forming a suction) removed the coring device

from the sediment and replaced the bottom cap All samples were taken

within the confines of a square meter aluminum irame

On the boat samples were washed through a 025-mm mesh screen placed

into labeled jars and fixed and preserved in a 4 formaldehyde solution

that contained rose bengal (a protein stain) At the laboratory samples

were washed of the formaldehyde sol ution and sorted with the aid of a 15X

dissecting microscope Invertebrates were identified to the lowest

practical taxon and counted

Initially 16 benthic cores were taken 15 to be used for benthic

invertebrate analysis and 1 for sediment analysis Subsequent statistical

analysis revealed 10 benthic invertebrate cores were sufficient to

adequately describe the benthic communities So after Survey 4

(1 August 1984) 11 benthic cores were collected per station

4

Opening

Top cap

Plexiglass disc c====tt====tt===J

PVC tubing

Bottom cap

1Scm String

Figure 2--Description of PVC benthic invertebrate sampling device

5

Station number date depth bottom salinity and temperature (taken

with a Beckman RS5-3 salinometer and probe1) sample size total numbers

frequency of occurrence and mean number 1m2 are presented in the Results

Besides the above H Shannon-Weaver diversity function (Shannon and Weaver

1963) SD Simpson diversity value (Simpson 1949) SR species richness

(Margalef 1958) and J species evenness value (Pielou 1966) were

calculated The following formulas were used s

1) H= - L Pi 10g2 Pii=1

where Pi= the proportion of individuals belonging to the ith

species

S = number of species s

2) SD= 1 - L Pi2 i=1

where Pi= the proporti on of individual s be longing to the i I th

species

3) SR= (S - l)loge N

where S= the number of species at the station

N= the total number of individuals at the station

4) J= H Ilog2 S

where H= the Shannon-Weaver diversity value

S = the number of species

Sediments were analyzed by seiving those particles lt 00625 mm were

considered the silt-clay fraction Organic content was determined by

burning at 550degC for 24 h

II Reference to trade names does not imply endorsement by National Marine Fisheries Service NOAA

6

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 3: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

INTRODUCTION

Interest has been shown in the possibility of a deep draft navigational

channel from the mouth of the Col umbia River to either Astoria or Tongue

Point Oregon However deepening the channel may increase the amount and

the duration of saltwater intrusions into Cathlamet Bay Cathlamet Bay is

presently a freshwater embayment saline water only enters the bay when

river flows are reduced (primarily summer and fall)

Cathlamet Bay supports large populations of invertebrates including

the gammarid amphipod Corophium salmonis an important food for many fish

species in the estuary (McCabe et al 1983) Many fishes including

juvenile salmonids feed in Cathlamet Bay It is possible that alterations

of salinity regimes in Cathlamet Bay due to channel deepening would reduce

Corophium and other invertebrate populations subsequently adversely

affecting the use of the bay by feeding fishes

In 1984 the Portland District of the Us Army Corps of Engineers

contracted with the National Marine Fisheries Service in a cooperative

effort to provide additional biological information on the existing benthic

invertebrate and fish communities in Cathlamet Bay The research findings

pertaining to the benthic invertebrate data are being presented in this data

report the fish data are presented in a separate report

METHODS

Thirteen benthic sampling surveys were conducted at approximately 2shy

week interval s from 13 March through 14 September 1984 Initial benthic

invertebrate and sediment samples were collected at Stations 18 48 54 and

57 (Fig 1 Table 1) Due to extremely low benthic invertebrate densities

at Stations 48 54 and 57 these stations were replaced with nearby

1

58 amp

c ~

lt ~ 57 57 - +$ ampmiddotJ~EE~L

IS Yamp1 sf~18 l) bull bull t - amp ~ ~~

$+ ~BAYCATHLAMET

~~

OREGON

1N

5 o KM

~GRAYS BAY WASHINGTONcgt

~ ~

amp - Core sampler

$ - Purse seine +- Trawl

I ) o MI

N

Figure l--Locations and station numbers of fish and invertebrate sampling sites in

Cathlamet Bay

Table 1--Geographic locations of the benthic sampling stations in

Cathlamet Bay

Geographic location Station (Latitude and Longitude) Site Description

18 46 1234 N 123 4252 W Adjacent to Green Dolphin 3 at Wend of North Channel

45 46 1128 N 123 4414 W Center of old Marishytime Basin 600 m N of Corps of Enginshyeers dock

48a 46 1053 N 123 4409 W Adjacent to Can 7 off SW end of Lois Island in South Channel

46 1053 N 123 38 41 W Adj acent to Svensen Island piling jetty W of Red Dolphin 12A

55 46 11 17 N 123 3800 W Adjacent to Red Dolphin 14 at SW end of Minaker Island

46 1300 N 123 3809 W 50 m N of Seal Island in Woody Island Channel

58 46 1354 N 123 4010 W Adjacent to Can 5 in Woody Island Channel [after can was moved (18 July) approxshyimately 300 m Wof can]

a Stations which were replaced during Survey 3

3

stations known to have higher densities --45 55 and 58 respectively

after Survey 2 Higher benthic invertebrate densities would provide better

statistically identifiable relationships between densities and salinity As

a result of the changes in sampling stations only samples from Station 18

were analyzed for Survey 2 (5 April 1984)

Benthic samples were collected by SCUBA divers using a coring device

The sampler was constructed of 385-cm (inside diameter) PVC pipe which

penetrated 15 cm into the sediment thereby collecting a 924 cm3 sediment

sample (Fig 2) The coring device was operated as follows 1) the sampler

was filled with water on the boat to aid in diver descent 2) on the bottom

the diver removed the bottom cap and pushed the sampler into the sediment

until it stopped at the plexiglass plate (15 cm) and 3) the diver placed

his thumb on the top opening (forming a suction) removed the coring device

from the sediment and replaced the bottom cap All samples were taken

within the confines of a square meter aluminum irame

On the boat samples were washed through a 025-mm mesh screen placed

into labeled jars and fixed and preserved in a 4 formaldehyde solution

that contained rose bengal (a protein stain) At the laboratory samples

were washed of the formaldehyde sol ution and sorted with the aid of a 15X

dissecting microscope Invertebrates were identified to the lowest

practical taxon and counted

Initially 16 benthic cores were taken 15 to be used for benthic

invertebrate analysis and 1 for sediment analysis Subsequent statistical

analysis revealed 10 benthic invertebrate cores were sufficient to

adequately describe the benthic communities So after Survey 4

(1 August 1984) 11 benthic cores were collected per station

4

Opening

Top cap

Plexiglass disc c====tt====tt===J

PVC tubing

Bottom cap

1Scm String

Figure 2--Description of PVC benthic invertebrate sampling device

5

Station number date depth bottom salinity and temperature (taken

with a Beckman RS5-3 salinometer and probe1) sample size total numbers

frequency of occurrence and mean number 1m2 are presented in the Results

Besides the above H Shannon-Weaver diversity function (Shannon and Weaver

1963) SD Simpson diversity value (Simpson 1949) SR species richness

(Margalef 1958) and J species evenness value (Pielou 1966) were

calculated The following formulas were used s

1) H= - L Pi 10g2 Pii=1

where Pi= the proportion of individuals belonging to the ith

species

S = number of species s

2) SD= 1 - L Pi2 i=1

where Pi= the proporti on of individual s be longing to the i I th

species

3) SR= (S - l)loge N

where S= the number of species at the station

N= the total number of individuals at the station

4) J= H Ilog2 S

where H= the Shannon-Weaver diversity value

S = the number of species

Sediments were analyzed by seiving those particles lt 00625 mm were

considered the silt-clay fraction Organic content was determined by

burning at 550degC for 24 h

II Reference to trade names does not imply endorsement by National Marine Fisheries Service NOAA

6

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 4: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

58 amp

c ~

lt ~ 57 57 - +$ ampmiddotJ~EE~L

IS Yamp1 sf~18 l) bull bull t - amp ~ ~~

$+ ~BAYCATHLAMET

~~

OREGON

1N

5 o KM

~GRAYS BAY WASHINGTONcgt

~ ~

amp - Core sampler

$ - Purse seine +- Trawl

I ) o MI

N

Figure l--Locations and station numbers of fish and invertebrate sampling sites in

Cathlamet Bay

Table 1--Geographic locations of the benthic sampling stations in

Cathlamet Bay

Geographic location Station (Latitude and Longitude) Site Description

18 46 1234 N 123 4252 W Adjacent to Green Dolphin 3 at Wend of North Channel

45 46 1128 N 123 4414 W Center of old Marishytime Basin 600 m N of Corps of Enginshyeers dock

48a 46 1053 N 123 4409 W Adjacent to Can 7 off SW end of Lois Island in South Channel

46 1053 N 123 38 41 W Adj acent to Svensen Island piling jetty W of Red Dolphin 12A

55 46 11 17 N 123 3800 W Adjacent to Red Dolphin 14 at SW end of Minaker Island

46 1300 N 123 3809 W 50 m N of Seal Island in Woody Island Channel

58 46 1354 N 123 4010 W Adjacent to Can 5 in Woody Island Channel [after can was moved (18 July) approxshyimately 300 m Wof can]

a Stations which were replaced during Survey 3

3

stations known to have higher densities --45 55 and 58 respectively

after Survey 2 Higher benthic invertebrate densities would provide better

statistically identifiable relationships between densities and salinity As

a result of the changes in sampling stations only samples from Station 18

were analyzed for Survey 2 (5 April 1984)

Benthic samples were collected by SCUBA divers using a coring device

The sampler was constructed of 385-cm (inside diameter) PVC pipe which

penetrated 15 cm into the sediment thereby collecting a 924 cm3 sediment

sample (Fig 2) The coring device was operated as follows 1) the sampler

was filled with water on the boat to aid in diver descent 2) on the bottom

the diver removed the bottom cap and pushed the sampler into the sediment

until it stopped at the plexiglass plate (15 cm) and 3) the diver placed

his thumb on the top opening (forming a suction) removed the coring device

from the sediment and replaced the bottom cap All samples were taken

within the confines of a square meter aluminum irame

On the boat samples were washed through a 025-mm mesh screen placed

into labeled jars and fixed and preserved in a 4 formaldehyde solution

that contained rose bengal (a protein stain) At the laboratory samples

were washed of the formaldehyde sol ution and sorted with the aid of a 15X

dissecting microscope Invertebrates were identified to the lowest

practical taxon and counted

Initially 16 benthic cores were taken 15 to be used for benthic

invertebrate analysis and 1 for sediment analysis Subsequent statistical

analysis revealed 10 benthic invertebrate cores were sufficient to

adequately describe the benthic communities So after Survey 4

(1 August 1984) 11 benthic cores were collected per station

4

Opening

Top cap

Plexiglass disc c====tt====tt===J

PVC tubing

Bottom cap

1Scm String

Figure 2--Description of PVC benthic invertebrate sampling device

5

Station number date depth bottom salinity and temperature (taken

with a Beckman RS5-3 salinometer and probe1) sample size total numbers

frequency of occurrence and mean number 1m2 are presented in the Results

Besides the above H Shannon-Weaver diversity function (Shannon and Weaver

1963) SD Simpson diversity value (Simpson 1949) SR species richness

(Margalef 1958) and J species evenness value (Pielou 1966) were

calculated The following formulas were used s

1) H= - L Pi 10g2 Pii=1

where Pi= the proportion of individuals belonging to the ith

species

S = number of species s

2) SD= 1 - L Pi2 i=1

where Pi= the proporti on of individual s be longing to the i I th

species

3) SR= (S - l)loge N

where S= the number of species at the station

N= the total number of individuals at the station

4) J= H Ilog2 S

where H= the Shannon-Weaver diversity value

S = the number of species

Sediments were analyzed by seiving those particles lt 00625 mm were

considered the silt-clay fraction Organic content was determined by

burning at 550degC for 24 h

II Reference to trade names does not imply endorsement by National Marine Fisheries Service NOAA

6

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 5: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Table 1--Geographic locations of the benthic sampling stations in

Cathlamet Bay

Geographic location Station (Latitude and Longitude) Site Description

18 46 1234 N 123 4252 W Adjacent to Green Dolphin 3 at Wend of North Channel

45 46 1128 N 123 4414 W Center of old Marishytime Basin 600 m N of Corps of Enginshyeers dock

48a 46 1053 N 123 4409 W Adjacent to Can 7 off SW end of Lois Island in South Channel

46 1053 N 123 38 41 W Adj acent to Svensen Island piling jetty W of Red Dolphin 12A

55 46 11 17 N 123 3800 W Adjacent to Red Dolphin 14 at SW end of Minaker Island

46 1300 N 123 3809 W 50 m N of Seal Island in Woody Island Channel

58 46 1354 N 123 4010 W Adjacent to Can 5 in Woody Island Channel [after can was moved (18 July) approxshyimately 300 m Wof can]

a Stations which were replaced during Survey 3

3

stations known to have higher densities --45 55 and 58 respectively

after Survey 2 Higher benthic invertebrate densities would provide better

statistically identifiable relationships between densities and salinity As

a result of the changes in sampling stations only samples from Station 18

were analyzed for Survey 2 (5 April 1984)

Benthic samples were collected by SCUBA divers using a coring device

The sampler was constructed of 385-cm (inside diameter) PVC pipe which

penetrated 15 cm into the sediment thereby collecting a 924 cm3 sediment

sample (Fig 2) The coring device was operated as follows 1) the sampler

was filled with water on the boat to aid in diver descent 2) on the bottom

the diver removed the bottom cap and pushed the sampler into the sediment

until it stopped at the plexiglass plate (15 cm) and 3) the diver placed

his thumb on the top opening (forming a suction) removed the coring device

from the sediment and replaced the bottom cap All samples were taken

within the confines of a square meter aluminum irame

On the boat samples were washed through a 025-mm mesh screen placed

into labeled jars and fixed and preserved in a 4 formaldehyde solution

that contained rose bengal (a protein stain) At the laboratory samples

were washed of the formaldehyde sol ution and sorted with the aid of a 15X

dissecting microscope Invertebrates were identified to the lowest

practical taxon and counted

Initially 16 benthic cores were taken 15 to be used for benthic

invertebrate analysis and 1 for sediment analysis Subsequent statistical

analysis revealed 10 benthic invertebrate cores were sufficient to

adequately describe the benthic communities So after Survey 4

(1 August 1984) 11 benthic cores were collected per station

4

Opening

Top cap

Plexiglass disc c====tt====tt===J

PVC tubing

Bottom cap

1Scm String

Figure 2--Description of PVC benthic invertebrate sampling device

5

Station number date depth bottom salinity and temperature (taken

with a Beckman RS5-3 salinometer and probe1) sample size total numbers

frequency of occurrence and mean number 1m2 are presented in the Results

Besides the above H Shannon-Weaver diversity function (Shannon and Weaver

1963) SD Simpson diversity value (Simpson 1949) SR species richness

(Margalef 1958) and J species evenness value (Pielou 1966) were

calculated The following formulas were used s

1) H= - L Pi 10g2 Pii=1

where Pi= the proportion of individuals belonging to the ith

species

S = number of species s

2) SD= 1 - L Pi2 i=1

where Pi= the proporti on of individual s be longing to the i I th

species

3) SR= (S - l)loge N

where S= the number of species at the station

N= the total number of individuals at the station

4) J= H Ilog2 S

where H= the Shannon-Weaver diversity value

S = the number of species

Sediments were analyzed by seiving those particles lt 00625 mm were

considered the silt-clay fraction Organic content was determined by

burning at 550degC for 24 h

II Reference to trade names does not imply endorsement by National Marine Fisheries Service NOAA

6

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 6: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

stations known to have higher densities --45 55 and 58 respectively

after Survey 2 Higher benthic invertebrate densities would provide better

statistically identifiable relationships between densities and salinity As

a result of the changes in sampling stations only samples from Station 18

were analyzed for Survey 2 (5 April 1984)

Benthic samples were collected by SCUBA divers using a coring device

The sampler was constructed of 385-cm (inside diameter) PVC pipe which

penetrated 15 cm into the sediment thereby collecting a 924 cm3 sediment

sample (Fig 2) The coring device was operated as follows 1) the sampler

was filled with water on the boat to aid in diver descent 2) on the bottom

the diver removed the bottom cap and pushed the sampler into the sediment

until it stopped at the plexiglass plate (15 cm) and 3) the diver placed

his thumb on the top opening (forming a suction) removed the coring device

from the sediment and replaced the bottom cap All samples were taken

within the confines of a square meter aluminum irame

On the boat samples were washed through a 025-mm mesh screen placed

into labeled jars and fixed and preserved in a 4 formaldehyde solution

that contained rose bengal (a protein stain) At the laboratory samples

were washed of the formaldehyde sol ution and sorted with the aid of a 15X

dissecting microscope Invertebrates were identified to the lowest

practical taxon and counted

Initially 16 benthic cores were taken 15 to be used for benthic

invertebrate analysis and 1 for sediment analysis Subsequent statistical

analysis revealed 10 benthic invertebrate cores were sufficient to

adequately describe the benthic communities So after Survey 4

(1 August 1984) 11 benthic cores were collected per station

4

Opening

Top cap

Plexiglass disc c====tt====tt===J

PVC tubing

Bottom cap

1Scm String

Figure 2--Description of PVC benthic invertebrate sampling device

5

Station number date depth bottom salinity and temperature (taken

with a Beckman RS5-3 salinometer and probe1) sample size total numbers

frequency of occurrence and mean number 1m2 are presented in the Results

Besides the above H Shannon-Weaver diversity function (Shannon and Weaver

1963) SD Simpson diversity value (Simpson 1949) SR species richness

(Margalef 1958) and J species evenness value (Pielou 1966) were

calculated The following formulas were used s

1) H= - L Pi 10g2 Pii=1

where Pi= the proportion of individuals belonging to the ith

species

S = number of species s

2) SD= 1 - L Pi2 i=1

where Pi= the proporti on of individual s be longing to the i I th

species

3) SR= (S - l)loge N

where S= the number of species at the station

N= the total number of individuals at the station

4) J= H Ilog2 S

where H= the Shannon-Weaver diversity value

S = the number of species

Sediments were analyzed by seiving those particles lt 00625 mm were

considered the silt-clay fraction Organic content was determined by

burning at 550degC for 24 h

II Reference to trade names does not imply endorsement by National Marine Fisheries Service NOAA

6

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 7: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Opening

Top cap

Plexiglass disc c====tt====tt===J

PVC tubing

Bottom cap

1Scm String

Figure 2--Description of PVC benthic invertebrate sampling device

5

Station number date depth bottom salinity and temperature (taken

with a Beckman RS5-3 salinometer and probe1) sample size total numbers

frequency of occurrence and mean number 1m2 are presented in the Results

Besides the above H Shannon-Weaver diversity function (Shannon and Weaver

1963) SD Simpson diversity value (Simpson 1949) SR species richness

(Margalef 1958) and J species evenness value (Pielou 1966) were

calculated The following formulas were used s

1) H= - L Pi 10g2 Pii=1

where Pi= the proportion of individuals belonging to the ith

species

S = number of species s

2) SD= 1 - L Pi2 i=1

where Pi= the proporti on of individual s be longing to the i I th

species

3) SR= (S - l)loge N

where S= the number of species at the station

N= the total number of individuals at the station

4) J= H Ilog2 S

where H= the Shannon-Weaver diversity value

S = the number of species

Sediments were analyzed by seiving those particles lt 00625 mm were

considered the silt-clay fraction Organic content was determined by

burning at 550degC for 24 h

II Reference to trade names does not imply endorsement by National Marine Fisheries Service NOAA

6

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 8: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station number date depth bottom salinity and temperature (taken

with a Beckman RS5-3 salinometer and probe1) sample size total numbers

frequency of occurrence and mean number 1m2 are presented in the Results

Besides the above H Shannon-Weaver diversity function (Shannon and Weaver

1963) SD Simpson diversity value (Simpson 1949) SR species richness

(Margalef 1958) and J species evenness value (Pielou 1966) were

calculated The following formulas were used s

1) H= - L Pi 10g2 Pii=1

where Pi= the proportion of individuals belonging to the ith

species

S = number of species s

2) SD= 1 - L Pi2 i=1

where Pi= the proporti on of individual s be longing to the i I th

species

3) SR= (S - l)loge N

where S= the number of species at the station

N= the total number of individuals at the station

4) J= H Ilog2 S

where H= the Shannon-Weaver diversity value

S = the number of species

Sediments were analyzed by seiving those particles lt 00625 mm were

considered the silt-clay fraction Organic content was determined by

burning at 550degC for 24 h

II Reference to trade names does not imply endorsement by National Marine Fisheries Service NOAA

6

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 9: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

RESULTS

Physical and biological data are presented by station in Appendix A A

list of the benthic invertebrate taxa identified during the survey are

presented in Table 1 Appendix B presents the sediment analysis

DISCUSSION

Although the purpose of this study was to obtain base line information

prior to modification of the ship navigational channel caution must be used

in interpreting the data First the MOBILOIL oil spill on 19 March 1984

may have affected the local benthic invertebrate biota Oil started to

occur in the benthic samples on the third survey (18 April 1984) and

continued until the end of the study (14 September 1984) Al though some

stations had more oil than others effects on the invertebrates were not

obvious Secondly year to year variations in benthic invertebrate species

and densities occur in the marine environment (Gray and Christie 1983)

Whether the benthic infauna in Cathlamet Bay varies cyclically is unknown

The long term stability or cycles need to be determined before changes of

the benthic infauna can be attributed to any habitat modification or

dredging proj ect

Salinity is considered to be the most important factor controlling the

distribution of estuarine animals (Kinne 1966) Since we performed our data

collections primarily at low tide the given salinity values must be

considered low values Chapman and Brinkhurst (1981) showed that seasonal

variations of benthic invertebrates in the Fraser River estuary were

correl ated with salini ty One common freshwater oligochaete species in

their study Limnodrilus hoffmeisteri also occurs in Cathlamet Bay Adult

hoffmeisteri can tolerate salinities up to 10 ppt and immatures 14 to

7

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 10: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Table 1--List of invertebrate taxa found at benthic invertebrate sites

located in Cathlamet Bay Oregon March through September 1984

Coelenterata Hydra sp

Turbellaria Nemertea Nematoda Nematomorpha Oligochaeta

Vejdovskyella intermedia Limnodrilus hoffmeisteri Ilydrilus frantzi

Polychaeta Neanthes limnicola Hobsonia florida Manyunkia speciosa

Gastropoda Lithoglyphys (=Fluminicola)

Bivalvia virens

Corbicula manilensis Ostracoda

Limnocythera sp Mysidacea

Neomysis mercedis Cumacea Amphipoda

Eogammarus spp Eogammarus confervicolus Corophium salmonis Corophium spinicorne Pontoporeia hoyi Eohaustorius estuaris

Isopoda Saduria entomon

Harpacticoida Scottolana canadensis

Insecta Diptera adult Diptera pupae Heleidae larvae Chironomidae larvae Chironomidae pupae Trichoptera larvae Hymenoptera Collembola

Hydracarina

Occurrence not quantified

8

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 11: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

15 ppt (Chapman and Brinkhurst 1980) This species appears to be a useful

salinity indicator and future benthic work should identify and enumerate

this species Due to time and taxonomic expertise requirements only the

oligochaete species Vejdovskyella intermedia was enumerated Salinity

tolerances of this species are unknown

Since intersti tial salinities do not vary dielly as do salini ties in

the water column (Sanders et al 1965) interstitial salinities should have

been measured Al though many infauna species may be exposed to overlying

water because of activity andor tubes (exCorophium spp) many benthic

invertebrates are dependent on interstitial salinity levels Measurements

of interstitial salinities are necesssary to determine benthic infauna

sensitivity to salinity intrusion

Finally there appeared to be a large amount of within station

variability in the sediment texture particularly at Stations 55 and 58

The sediment at Station 55 ranged from a very fine sand to almost all clay

The sediment texture variability at Station 58 was a result of the uS

Coast Guard moving Can 5 to a new location forcing us to estimate the

previous location of our station

ACKNOWLEDGMENTS

We wish to thank Maurice Laird Nick Zorich Larry Davis Roy Pettit

Edward Koller and David Miller for their assistance in developing the

sampling device and collecting the samples We express special thanks to

Sandy Lipovsky Thomas Moylan and Susan Newhouse for helping sort and

identify the invertebrates

9

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 12: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

LITERATURE CITED

Chapman P M and R O Brinkhurst

1980 Salinity tolerance of some selected aquatic oligochaetes Internat

Rev der Gesamten Hydrobio1gie 65499-505

Chapman P M and R O Brinkhurst

1981 Seasonal changes in interstitial salinities and seasonal movements

of subtidal benthic invertebrates in the Fraser River estuary BC Est

Coast Shelf Sci 1249-66

Gray J S and H Christie

1983 Predicting long-term changes in marine benthic communities Mar

Ecol Prog Sere 1387-94

Kinne O

1966 Physiological aspects of animal life in estuaries with special

reference to salinity Neth J of Sea Res 3 227-244

Margalef R

1958 Information theory in ecology Gen Syst 336-71

McCabe G T Jr W D Muir R L Emmett and J T Durkin

1983 Interrelationships between juvenile sa1monids and nonsalmonid fish

in thl Columbia River estuary Fish Bu11U S 81(4)815-826

Pie10u E L

1966 The measurement of diversity in different types of biological

collections J Theor BioI 13131-144

Sanders H L P C Mange1sdorf and G R Hampson

1965 Salinity and faunal distribution in the Pocasset River

Massachusetts Limno Ocean 10216-229

Shannon L E and W Weaver

1963 The mathematical theory of communication Univ of Illinois Press

Urbana Ill

10

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 13: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Simpson E H

1949 Measurement of diversity Nature 163688

11

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 14: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

APPENDIX A--Descriptive summary of benthic invertebrate data collected in

Cathlamet Bay Oregon during March through September 1984

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 15: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 13 March 1984 Depth 46 m Salinity (bottom) 11 ppt Temperature (bottom) 67 C No of samples 15

Frequency Density (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 2 67 1145 4434 Nematoda 134 1000 76702 33169 Turbellaria 22 667 12593 15854 ~~n~b~~ imnpoundQ 31 Oligochaeta 486

933 17744 1468 1 100() 278186 138779

~QtQif~12 mnil~nsectisect 24 Ostracoda 39

933 13738 8462 800 22324 17715

~Q[QQbiYm ~lmQni~ 74 867 42358 38B70 EQntQIH~i2 Qyi 1 EQri gnQQn 1 Harpacticoida 7

67 572 2217 67 572 221 7

333 4007 7159 Insecta 2 67 1145 4434 Chironomid larvae 20 667 1144 B 10090 Collembola 95 867 54378 82588 Hydracarina 1 67 572 221 7

Mean number of organismssample 626 Standard deviation 19 1

M ean num b er 0 f 2organIsms III 537484 Standard deviation 163579

H= 237 so= 069 SR= 1 42 J= 061

A-l

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 16: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 48 Date 13 March 1984 Depth 107 m Salinity (bottom) 05 ppt Temperature (bottom) bB C No of sampl es 15

Frequency Densi ty (nom 2 ) Total occurrence

Taxa number (7) X SD

Nemertea 31 6b7 17744 1849 1 Nematoda 38 667 21751 22685 Oligochaeta 4 133 2290 6859 ~QQpound12 2nil~nsectisect 31 Ostracoda 1

667 17744 29648 67 572 221 7

~Q9~~[~ spp 1 ~Q[Q2l ~~lQnisect 1 ~Q2sectiQisect sectisect 4 Harpacticoida 1

67 572 2217 67 572 221 7

200 2290 5097 67 572 221 7

Insecta 2 133 1145 3021 Diptera adult 1 67 572 2217 Collembola 24 467 13738 30923

Mean number of organismssample 93 Standard deviation 59

Mean number of organismsm2 795b4 Standard deviation 50740

H= 255 SD= 079 SR= 1 55 J= 071

A-2

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 17: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 54 Date 14 March 1984 Depth 177 m Salinity (bottom) 00 ppt Temperature (bottom) 66 C No of samples 15

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nemertea 47 1000 26903 14096 Nematoda 7 267 4007 9102 Turbellaria 9 333 5152 1114B Oligochaeta 11 333 6296 10989 Gastropoda 1 67 572 2217 ~Q(Qi~Yl mnil~n2i~ Ostracoda

199 3

1000 200

11390B 171 7

97165 3555

gQ[Qehiy sectlmQnisect Harpacticoida

3 1

200 67

171 7 572

3555 221 7

Heleidae larvae 29 867 16600 10989 Chironomid larvae 2 133 1145 3021 Collembola 2 67 1145 4434

Mean number of organismssample 209 Standard deviation 103

2Mean number 0 f organIsms m 179734 Standard deviation 88247

H = 1 86 SD= 056 SR= 1 33 J= 052

A-3

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 18: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 57 Date 13 March 1984 Depth 91 m Salinity (bottom) 00 ppt Temperature (bottom) 63 C No of sampl es 15

Frequency Densi ty (no 81 2) Total occurrence

Taxa number (X) X SD

Nemertea 27 667 15455 13459 Nematoda 8 400 4579 6381 Turbellaria 4 200 2290 5097 Oligochaeta 8 400 4579 6381 ~g[gipound~l mnilui Ostracoda

1 1

67 67

572 572

2217 2217

~Qgml[a spp 1 67 572 2217 ~Q[Qeni~m lmQnisect Harpacticoida

2 1

133 67

1145 572

3021 221 7

Insecta 3 67 171 7 b651 Chironomid larvae 1 b7 572 221 7 Collembola 37 400 21179 65700 Hydracarina 1 67 572 221 7

Mean number of organismssample 63 Standard deviation 82

Mean number of organismsm2 54378 Standard deviation 70029

H= 253 SD= 075 SR= 1 83 J= 068

A-4

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 19: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 5 April 1984 Depth 30 II

Salinity (bottoll) 00 ppt Temperature (bottom) 90 C No of samples 15

Frequency Densi ty (no1I 2) Total occurrence

Taxa number (i ) If S D

Nemertea 11 bOO 6296 6042 Nematomorpha 2 133 1145 3021 Nuatoda 119 1000 6811 6 50947 Turbellaria 20 600 11448 13640 ~~~nin~sect liIDni~Q12 Oligochaeta

33 481

1000 1000

18889 275324

10364 142326

~Q~Qi~Yl m2nil~ni2 23 600 13165 1371 7 Ostracoda 33 933 18889 10861 gQ(QQrriYID sect2mQnisectHarpacti coi da

38 7

933 133

21751 4007

13329 13328

Chironomid larvae 16 667 9158 8868 ColI embola 1 67 572 2217

Mean number of organismssample 523 Standard deviation 227

M b f 2ean num er 0 organIsms m 448762 Standard deviation 194508

H= 202 SD= 059 SR= 114 J= 0S6

A-5

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 20: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 18 April 1984 Depth 64 III

Salinity (bottom) 00 ppt Temperature (bottom) 95 C No of samples 15

Total Frequency occurrence

Density (noI 2 )

Taxa number (X) X SD

Nematoda 171 1000 97890 92277 tyg~ sp Turbellaria

1 29

67 600

572 16600

221 7 23506

H~nng~ imDi~g tQQsectQl fg~ig Oligochaeta ~Q[Qi~Y2 m2niD~i Ostracodamiddot

9 41

367 42

100

400 1000 1000 800

1000

5152 23469

210071 24041 57240

781 5 13563

100542 19254 43134

~Q[Qeniym amQnisectHarpacticoida Heleidae larvae

37 2049

1

933 1000

67

21179 117284B

572

189B5 616612

221 7 Chironomid larvae 3 200 171 7 3555 Collembola 1 67 572 221 7 Insect parts 1 67 572 221 7

Mean number of organismssample 1901 Standard deviation 864

b f 2nean num er 0 organIsms m 1632485 Standard deviation 741931

H = 1 52 SD= 046 SR= 1 13 J= 040

A-6

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 21: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 18 April 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa nueber (X) x s D

Nemertea 13 533 7441 9663 Nematomorpha 3 200 171 7 3555 Nematoda 195 1000 111618 63675 Turbell ari a 9 467 5152 6326 ~~ni~~ i~ni~Ql~ 30 867 17172 129B1 Oligochaeta 580 1000 331992 108880 ~QC~i~Ml~ m~nil~n~isectOstracoda

28 18

1000 667

16027 10303

11179 10364

~Q[Q~~iYm sect~Qni2 sect~ci~ gniQQnHarpacticoida

105 1

17

1000 67

400

60102 572

9731

25553 2217

19970 Chironollid larvae 16 667 9158 8B6B

Hean number of organismssample 677 Standard deviation 199

M ean num b I 2er 0 f organIsms AI 580986 Standard deviation 171095

w = 202 SD= 062 SR= 1 10 J= 056

95 C

A-7

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 22: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 18 April 1984 Depth 67 m Salinity (bottom) 00 ppt Temperature (botto) No of samples 15

Frequency Density (nom2) Total occurrence

Taxa number (~) X SD

Nemertea 62 933 35489 26338 Nematoda 224 1000 128218 49903 Turbellaria 9 600 5152 4354 ~nt~sect imni~Q Oligochaeta

1 79

67 1000

572 45220

2217 23506

bnQgYRhY~ Yi~~nE ~Q(~i~Y nil~ni Ostracoda

2 10 19

67 533 600

1145 5724

10876

4434 6214

10989 ~Q[QeniY sectQOiHarpacticoida

30 2

B67 133

17172 1145

12142 3021

Heleidae larvae 6 333 3434 5430 Chironomid larvae 9 400 5152 7B1 5 Chironomid pupae 2 133 1145 3021

Mean number of organismssample 303 Standard deviation 94

I 11 ean num ber 0 f organlsms 2 260442 Standard deviation 81043

H= 233 SO= 070 SR= 1 36 J= 063

97 C

A-B

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 23: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Frequency Density (nolm 2) Total occurrence -----------------

Taxa number (7) X SD

Nemertea 16 467 9158 10989 Nematoda 266 1000 152258 54541 Turbellaria 23 600 13165 15518 ~l~nH ~Q~iQH 2 133 1145 3021 Oligochaeta 181 1000 103604 56532 bi~hQg~Qn~~ ~it~l~ ~QtQifg mli~lsectisectOstracoda

3 59 15

200 1000 733

1717 33772 8586

3555 23054

7256 ~Q[QQhiY HmQtlsect ~Q[QehiYm sect21tlfQ[lg EQlQQQt~i hQ~i

466 3 1

1000 200 67

266738 171 7 572

75094 3555 221 7

Harpacticoida 30 400 17172 40402 Chironomid larvae 10 533 5724 6214

Mean number of organismssa_pIe 717 Standard deviation 143

I 2Mean number 0 f organlsms m 615330 Standard deviation 122532

H= 226 SO= 072 SR= 119 J= 061

STATION 55 Date 18 April 1984 Depth 30 1ft

Salinity (bottom) 00 ppt Temperature (bottom) 93 C No of SaIIples 15

A-9

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 24: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 4 Hay 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 103 C No of samples 10

Frequency Density (noI2) Total occurrence ---------------- shy

Taxa number (Xl X SD

Neutoda 269 1000 230963 167296 Turbellaria 1 100 859 2715 ~u~yuti Q~iQ ~Ub imni~Q

1 2

100 100

859 171 7

2715 5430

j2~Qn flec Oligochaeta

28 169

BOO 1000

24041 145103

19326 74351

~igeYk~ll iulCIDai ~Q(Qi~Y uini Ostracoda

32 4 5

aoo 400

400

27475 3434 4293

22463 4434 6071

biQQ~~tbt sp ~e(QQbYm mQoi sectampQeD ~nQDisect Chironomid larvae

25 2

578 2

900 200

1000 200

21465 1717

496271 171 7

15279 3620

293820 3620

Mean number of organismssample 111 8 Standard deviation 522

11 b f I 2ean num er 0 organIsms m 95991 5 Standard deviation 447842

H= 193 SD= 065 SR= 118 J= 052

A-10

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 25: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 4 Hay 1984 Depth 34 II

Salinity (bottom) 00 ppt Temperature (bottom) 104 C No of saMples 10

Frequency Density (noI 2 ) occurrence ----------------shy

Taxa (X) X SD

Nemertea 10 600 8SB6 10709 Nuatoda 153 1000 131366 47899 Turbellaria 8 600 6869 6773 ~n1b limnpoundQl Oligochaeta

11 147

700 1000

middot9445 126214

9449 6231 7

~i~g~kXl in1(m~i ~g(2iY OiOi Ostracoda

86 4 1

900 300 100

73840 3434 859

61543 6003 2715

bimoQpoundx1b( sp ~2(QQbiYm mgoiDi ptera adult

3 57

3

300 900 300

2576 48940

2576

4147 21815 4147

Chironomid larvae 4 300 3434 6003 Chironomid pupae 1 100 859 2715

Hean nUMber of orQanismssample 489 Standard deviation 160

b f 2nean nUll er 0 organIsms II 418997 Standard deviation 137721

H= 243 SD= 076 SR= 1 34 J= 066

A-l1

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 26: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 5B Date 4 Hay 1984 Depth 61 bull Salinity (botto~) 00 ppt Temperature (bottom) 110 C No of suples 10

Frequency Density (nom 2) Total occurrence ---------------- shy

Taxa number (X) X SD

Neertn 41 1000 35203 21206 Nematoda 211 1000 181165 53305 Turbellaria 4 200 3434 7240 Oligochaeta 89 1000 76415 32240 ~i~2~~~11~ iU1(~i~bi1begygny YitQ ~e(biYl ~OiDi OstracDda

4 3

20 1

400 200 BOO 100

3434 2576

17172 859

4434 5795

19829 2715

biue~1bt~ sp ~2(egniY Imeoi sectg11g1O OdD Helei dae larvae

5 32

1 1

400 900 100 100

4293 27475

859 859

6071 18010 2715 2715

Chironomid larvae 7 400 6010 9096

Mean number of organismssample 419 Standard deviation 93

b f 2ean nUll er 0 organIsms m 359753 Standard deviation 79875

H= 221 SD= 068 SR= 138 J= 060

A-12

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 27: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Frequency Density (nolm 2) occurrence -----------------

Taxa (X) X SD

Nemertea 23 900 1974S 15171 Neutollorpha 1 100 859 271 5 Nellatoda 269 1000 230963 69923 Turbellaria 10 600 8586 991 4 ~~xYnki Q~ampiQ 4 300 3434 6003 ~nb limnipoundQl Oligochaeta

1 79

100 1000

859 67829

2715 40363

~i~Q~kXl io[~i biDe9XQDX ~i[~OBi valvi a

11 3 1

800 300 100

9445 2576 859

6335 4147 271 5

~Q[~poundY mnil~n bimoQampXD[ sp ~Q[QabiY lQO Harpacticoida

18 2

159 1

700 200

1000 100

15455 171 7

135659 859

13904 3620

54272 2715

Chironomid larvae 2 200 171 7 3620 Trichoptera larvae 1 100 859 2715

STATION 55 Date 4 May 1984 Depth 21 m Salinity (bottom) 00 ppt Temperature (bottom) 107 C No of suples 10

Mean number of organismssamples 594 Standard deviation 147

Mean number of organismsm2 501422 Standard deviation 126525

H= 219 aD= 069 SR= 1 63 J= 055

A-13

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 28: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 17 May 1984 Depth 61 m Sal i ni ty (bottom) 01 ppt Temperature (bottom) 121 C No of sampl es 10

Frequency Total occurrence

Taxa nUlllber (7)

NelDertea 1 100 859 2715 Nematoda 163 1000 139952 127996 Polychaeta 1 100 859 2715 ~~~n~h~ imni~Qs Hobsonia florida

2 6

200 600

171 7 5152

3620 4434

Oligochaeta 329 1000 282479 13291 8 ~~lQQYsectk~~12 in~~rmQi 57 900 48940 33142 ~Qr~ipound~2 ffi2niDi 6 500 5152 6003 Ostracoda 5 200 4293 10898 bimDg~yth( SPa 13 600 11162 12176 ~Q(Qebi~m sectQDisect Harpacticaida

2 2

200 100

1717 1717

3620 5430

2poundQttQD poundDQDsectisectDiptera adult

296 1

1000 100

254146 859

172633 271 5

Mean number of organismssample 884 Standard deviation 326

b f I 2nean num er 0 organlss m 759002 Standard deviation 280131

H= 209 SD= 071 SR= 1 33 J= 055

A-14

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 29: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 17 May 1984 Depth 30 m Salinity (bottom) 00 ppt Temperature (bottom) 122 C No of samples 12

Frequency Density (nom2) Total occurrence -----------------

Taxa number (X) X SD

Nematoda 50 833 35775 22815 ~ntb limnipoundQl 3 Oligochaeta 97

250 833

2147 69404

3883 48495

~igQ~~k~ intr~ 27 ~QrQipoundY mnin~i~ 5

667 333

19319 3S7S

19068 5740

Ostracoda 1 83 716 2479 bimnQpound~nr sp 5 ~Q(Q~bY ~mQni S4 ~Q(Q~niY ~QinipoundQ(n 3

333 833 250

3578 60102

2147

5740 43780 3883

fgnQ2Q(i bQ~i 1 sectpoundQtgO poundnQn~i 2 Chironomid larvae 4

83 167 250

716 1431 2862

2479 3342 5592

Mean number of organismssample 235 Standard deviation 116

nean nURl b er 0 f organlslls II 2 201771 Standard devi ati on 99221

H= 236 SD= 075 SR= 1 35 J= 066

A-15

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 30: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 17 May 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) 123 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nemertea 2 100 171 7 5430 Nematoda 75 1000 64395 34404 ~~2Qih~a limQi~Q 2 200 171 7 3620 Oligochaeta 60 1000 51516 33376 ~~igQY~~~12 iQ~[~~gi 2 200 171 7 3620 bitQQ9~Bh~sect Yr~Qsect 3 200 2576 579~

gQ[Qi~Yl ID2Dil~nsectisect Ostracoda

6 6

500 400

5152 5152

6003 8295

binQ~~nr[ sp gg[QQOYm mQQsect sect~QttQn 5n2Q~nsectia Chironomid larvae

2 34

1 1

200 1000

100 100

171 7 29192

859 859

3620 12927 271 5 2715

Mean number of organismssample 194 Standard deviation

2Mean nurn ber 0 f organIsms fA 166568 Standard deviation 56259

H= 225 SD= 072 SR= 1 45 J= 063

A-16

66

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 31: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 55 Date 17 May 1984 Depth 24 II

Salinity (bottom) 00 ppt Telllperature (bottom) 126 C No of samples 10

Total Frequency occurrence

Taxa nUllber (X) X SD --------------------------------------------------------------~-----------

Nematollorpha 2 200 171 7 3620 Nematoda 63 1000 54092 35297 Oligochaeta 94 1000 80708 44004 ~~iQQY~k~~l iQt~(m~Qi bitnQg~Qh~~ Yi[~Q gQ[QipoundY~ mni~Q~i Ostracoda

10 9 4 2

600 800 300 100

8586 7727 3434 171 7

9050 4874 6003 5430

bimnQ~~ln~[e sp ~Q(QQbiYm mQD ~Q[QQbiYm 2inipoundQ[n~ Chironomid larvae

6 142

3 1

600 1000 200 100

5152 121921

2576 859

4434 50682 5795 2715

Mean number of organismssample 336 Standard deviation 62

2Mean num ber 0 f organisms m 288490 Standard deviation 53421

H= 214 SD= 071 SR= 119 J= 062

A-17

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 32: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 1 June 1984 Depth 61 m Salinity (bottom) 01 ppt Temperature (bottom) 139 C No of samples 10

Total Frequency occurrence

Density (no2)

Taxa nUllber (1) X SD

Nematoda 174 900 149396 132347 Turbellaria 5 200 4293 10898 ~~~QiQ~sect tmQtpoundQ~ ~QQsectQ flQi~sect Oligochaeta ~~iQQysecttygl~ iQl~rm~~i2 ~Q[Qi~~l~ ~~DilgDsectisect Ostracoda

5 20

190 103

12 5

400 900

1000 900

60 (I 400

4293 17172

163134 88436 10303 4293

6071 8095

92563 51524 11304 6071

bimnQpoundytng[ sp ~gQmYsectisect IDg[pound~Qisect ~Q[QQhi~m sectlmQDisect sectpoundQtiQlsectQ pound~Qgsectisect ChironQmid larvae

33 1

10 375

2

900 100 700

1000 200

28334 859

8586 321975

171 7

17196 2715 7010

179201 3620

Mean number of organismssample 935 Standard deviation 254

nurn b 0 f 2lean er organlsms m 802791 Standard deviation 218423

H= 239 SD= 075 SR= 1 22 J= 065

A-18

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 33: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 1 June 1984 Depth 30 AI

Salinity (bottom) 00 ppt Temperature (bottom) 134 C No of samples 11

Frequency Density (no 1m2)

Taxa Total number

occurrence (X)

---------------- shyX SD

Turbellaria 14 636 10928 1157 7 ~~~Qltlg~ ilipoundQ~ Oligochaeta

10 178

727 1000

7805 138937

601 6 67913

~~iQQy~tY~l~ ill~[m~Qi~ 122 636 95227 93619 ~Q[Qipound~ l~i~lsectisect Ostracoda

7 1

455 9 1

5464 78 1

6946 2589

billQylhg[ Spa 16 818 12489 10420 GQ[QQQil HQi~ 139 1000 108496 70934 gQ[Qebi secteiifQ[~ sectQiiQi2 ~Q~sectisect Diptera pupae

1 2 1

9 1 182

11 1

781 1561 781

2589 3473 2589

Chironomid larvae 2 182 1561 3473

Mean number of organismssample 714 Standard deviation 284

nean num b er 0 f organlsms m 2 612728 Standard deviation 244249

H= 232 SD= 075 SR= 1 25 J= 063

A-19

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 34: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 1 June 1984 Depth 61 m Salinity (bottom) 00 ppt Temperature (bottom) 138 C No of samples 10

Frequency Density (noI 2 ) Total occurrence

Taxa number (X) X SD

Nematoda 173 1000 148538 47383 Turbellaria 3 300 2576 4147 Oligochaeta 53 1000 45506 32139 ~giQgY2k~g~ ini~[m~Qi~ bQg91YehY2 Yi[~nsect ~Qr~i~Yl m~nl~n~i

26 1

10

600 100 500

22324 859

8586

3391 2 2715

13424 bimnQpound~Q~[ sp ~Q9~m[Y poundgnitYpoundQlysect ~QtQehiYm ~lQni

4 1

46

200 100

1000

3434 859

39496

8295 2715

22243 Chironomid larvae 1 100 859 271 5

Mean number of organismssample 318 standard deviation 103

M b f I 2ean num er 0 organlsms III 273035 Standard deviation 88842

H = 1 99 SD= 065 SR= 1 08 J= 060

A-20

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 35: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 55 Date 1 June 1984 Depth 27 m Salinity (bottom) 00 ppt Temp era t u r e (b 0 t tom) 140 C No of samples 10

Frequency Density (nom 2 ) Total occurrence

Taxa nueber (X) X SD

Nematoda 157 1000 134800 69524 Turbellaria 9 400 7727 13696 tlHl~lk ~2~~iQH 1 100 859 2715 Oligochaeta 49 1000 42071 32745 ~~iQQysect~gl~ S[l9sect bHbQghQb~~ Yirl~

10 1

400 100

8586 859

12799 2715

tQ[Qpoundls l2lilUsect bilQHSbg[ sp ~QrQQbil nllQisectHarpacticoida

4 7

134 1

400 500

1000 100

3434 6010

115052 859

4434 7069

44742 271 5

sectpoundQUQlls poundsQgn~sect Chironomid larvae

1 1

100 100

859 859

271 5 2715

Hydracarina 1 100 859 2715

Hean number of organismssample 376 Standard deviation 132

M b f 2ean num er 0 organIsms m 322834 Standard deviation 113127

H= 202 SD= 068 SR= 1 40 J= 055

A-21

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 36: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 18 June 1984 Depth 67 m Salinity (bottom) 01 ppt Temperature (bottom) 149 C No of samples 10

Frequency Density (nom2)

Taxa Total nUllber

occurrence ex) i SD

Nematoda 109 1000 93587 3891 7 Turbell ari a 3 200 2576 5795 ~g~tbg limoipoundQl Q~Qni2 fQ(i~2 Oligochaeta ~gigQ~~Y inl[ggi ~Q[QiSY2 moilo Ostracoda

3 2

194 44

7 3

200 200

1000 1000 200 200

2576 171 7

16656B 37778 6010 2576

5795 3620

118364 36020 12831 5795

bimoQampl~n~[2 sp ~Q[QQbiYm lmgoi Harpacticoida sectpoundQQ1202 pound2022Osect Chironomid larvae

68 1 1

113 2

900 100 100

1000 200

58385 859 859

97022 171 7

97627 2715 2715

73976 3620

Mean number of organismssa_pie 550 Standard deviation 371

Mean nUll ber 0 f organIsms 2II 472230 Standard deviation 318519

H= 242 SD= 077 SR= 1 32 Ja 065

A-22

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 37: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 18 June 1984 Depth 34 m Salinity (bottom) 00 ppt Temperature (bottom) 155 C No of samples 10

Frequency Density (nom 2) Total occurrence ----------------shy

Taxa nUlber (Z) X SD

Neutoda 291 1000 249853 138826 Turbellaria 1 100 859 2715 ~~n~~nki~ sectQ~~iQ~2 ~g~ntbg2 limni~Q9 Oligochaeta

1 3

123

100 300

1000

859 2576

105608

271 5 4147

48240 ~~igQY~~~~9 int~(mgii ~Q[~i~~~ mini~ni bimnQ~ylbg(~ Spa

67 6 5

1000 500 400

57526 5152 4293

40485 6003 6071

~Q(QebiYm ~imQnisect Harpacticoida

80 2

1000 200

68688 171 7

41276 3620

sect~QttQini ~2nig~n~i Chironomid larvae

2 4

200 300

171 7 3434

3620 6003

Mean number of organismssample 585 Standard deviation 194

I 2Mean urn b er 0 f organIsms m 502281 Standard deviation 166943

H= 203 SD= 068 SR= 1 20 J= 057

A-23

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 38: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATI ON 58 Date 18 June 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (noI 2) Total occurrence

TaKa number (X) X SD

Nellertea 2 100 1717 5430 Nematoda 160 1000 137376 6361 1 Turbellaria 4 400 3434 4434 Oligochaeta 36 1000 3091 0 14705 ~iQQYik~ Q1rQ 4 300 3434 6003 bitnQgl~ebysect YrDsect ~Q[QiY~ ~~nni biQQpoundY1h[ sp ~Q[Qeng ~ilQD Chironomid larvae

3 1 3

61 1

300 100 300

1000 100

2576 859

2576 52375

859

4147 2715 4147

1428 1 2715

Chironollid pupae 1 100 859 271 5

Mean number of organismssample 276 standard deviation 72

nean nurn b er 0 f organIsms I 2 236974 Standard deviation 61410

H = 1 78 SD= 060 SR= 1 23 J= 051

A-24

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 39: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 55 Date 18 June 1984 Depth 18 m Salinity (bottom)1 00 ppt Temperature (bottom) 157 C No of samples 10

Frequency Density (no 1m2) occurrence

Taxa (X) X SD

Nematoda 160 1000 137376 43967 Turbellaria 1 100 859 271 5 Oligochaeta 61 1000 52375 31985 ~~iQQY~kY~~ int~[mQi~ ~Q[Qipound~l~ m~nini~ biIDnQ~Ylb[s sp

3 3 3

300 300 300

2576 2576 2576

4147 4147 4147

~Q[Q~bi~ ~slIDQni~ Chironomid larvae

85 6

1000 600

72981 5152

34165 4434

Mean number of organismssample 322 Standard deviation 75

2Mean number 0 f organIsms m 276469 Standard deviation 64099

H= 178 5D= 065 SR= 0B4 J= 059

A-25

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 40: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Frequency Density (no2) occurrence -----------------

Taxa (7) X SD

Nematoda 104 1000 89294 47409 Turbell ar i a 1 100 859 2715 ~~~nQ~sect imni~Q~ tjQQsectQlis flQig~ Oligochaeta

2 1

297

100 100

1000

171 7 859

255004

5430 271 5

146273 ~~i~QYsect~Y~lls ilr2is gQrQi~y~ IDDilDia

24 4

600 300

20606 3434

27212 6003

Ostracoda 2 200 171 7 3620 biDQSy~b~C~ sp M~QYsectisect m~r~~Qi ~QrQeniy QD Harpacticoida

157 1 1 1

900 100 100 100

134800 859 859 859

73197 2715 2715 2715

sectpoundQttQDs SsDQD 113 900 97022 61656

STATION 45 Date 2 July 1984 Depth 61 III

Salinity (bottom) 00 ppt Temperature (bottom) No of samples 10

172 C

Mean number of organismssample 708 Standard deviation 339

M ean num b er f 20 organisms 607889 Standard deviation 290B22

H= 216 SD= 073 SR= 1 27 J= 058

1-26

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 41: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 2 July 1984 Depth 24 WI

Sal inity (bottom) 00 ppt Temperature (bottom) 172 C No of samples 10

--------------------------------~-----------------------------------------Frequency Density (nom2)

Total occurrence Taxa number (7) X SD

Nematoda 202 1000 173437 113532 ~~~nih~sect mnpoundQ~ Oligochleta

4 102

400 1000

3434 87577

4434 54873

~~igQYsect~Y~12 inl~rmgi2 ~Q[~poundYl~ m~ni~nsectisect bimnQpoundylh~[~ Spa

115 4

15

900 300 900

98739 3434

12879

100720 6003 9274

~Q[QQniY~ sect~QDi~ 55 900 47223 40525 Harpacticoida 1 100 859 2715 sectpoundQiiQlD SDg~DEisect Chironomid larvae

2 6

200 400

1717 5152

3620 7240

Hymenoptera 1 100 859 2715 Hydracarina 1 100 859 2715

Mean number of organismssample 508 Standard deviation 253

2Mean num ber 0 f organIsms m 436169 Standard deviation 217580

H= 225 SD= 074 SR= 1 22 J= 063

A-27

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 42: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 2 July 1984 Depth 58 1

Salinity (bottom) 00 ppt Temperature (bottom) IBO C No of samples 10

Frequency Density (no2) Total occurrence

Taxa number ltX) i SD

Nematoda 151 1000 129649 42729 Turbellaria 1 100 859 2715 01 i gochaeta 41 1000 35203 22698 ~~i~e~~~ int~~m~~ 3 200 2576 5795 btbQglYRhY~ Yir~n~ ~e~~ampy mni~niii bimQeamp~tb~ sp ~e~eQhiY ~mQni Chironomid larvae

1 4 2

68 1

100 300 200

1000 100

859 3434 171 7

58385 859

271 5 6003 3620

1557 1 2715

Mean number of organisassample 272 Standard deviation

I 2Mean num ber 0 f organIsms I 233539 Standard deviation 62546

H = 1 69 SD= 061 SR= 099 J= 053

A-28

73

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 43: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 55 Date 2 July 1984 Depth 15 III

Salinity (bottom) 00 ppt Temperature (bottom) 182 C No of samples 10

Frequency Density (nom2) occurrence

Taxa (X) X SD

Nematoda 184 1()00 157982 5264B Turbellaria 1 100 859 271 5 Oligochaeta ~~iQQ~sect~Y~ll~ n~[~~Qi~ bitnggYQDYsect Yi[~nsect ~QrQipoundM2 m2ni~nsectisect bimnQpoundYn~[2 sp ~QrQQhiM Qni Harpacticoida

91 2 1 B 2

96 2

1000 200 100 500 200

1000 200

78133 171 7 859

6869 171 7

82426 1111

26058 3620 271 5 1890 3620shy

25980 3620

ChirDnomid larvae 5 400 4293 6071 Chironolllid pupae 1 100 859 2715

Mean number of organismssample 393 Standard deviation 53

2t1ean nUllber Df organlsms III 337430 Standard deviatiDn 45080

H= 187 SD= 067 SR= 116 J= 054

A-29

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 44: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 17 Jul y 1984 Depth 58 m Salinity (bottom) 00 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (X) X SD

Nematoda 215 1000 184599 45837 ~~n~b~~ imDipoundQ Qe~Qni fllHi2

3 1

300 100

2576 859

4147 2715

Oligochaeta 305 1000 261873 147955 ~~iQQY~k~ in~rm~2i ~Qr~ipoundYl IDniln~i~ Ostracoda

17 1 2

500 100 200

14590 859

171 7

22554 2715 3620

bmnQpound~ihr sp ~QCQQhiY ~lQD~

176 1

1000 100

151114 859

57125 2715

Harpacticoida 4 300 3434 6003 sectQ~~Qn poundnQnai~ Chironomid larvae

91 5

1000 400

78133 4293

61310 6071

Mean number of organismssample 821 Standard deviation 275

M b f 2ean num er 0 organlsms m 70491 1 Standard deviation 236369

H= 215 SD= 073 SR= 114 J= 060

A-30

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 45: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 17 Jul y 1984 Depth 27 m Salinity (bottom) 00 ppt Temperature (bottom 203 C No of samples 10

Frequency Density (001 2 Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 339 1000 291065 119140 Turbellaria 3 200 2576 5795 ~~2~b~~ limnipoundQ12Oligochaeta

4 18S

300 1000

3434 161417

6003 89393

~~iQQy~~~ls in~(ID~Qi bim~Qampy~bg(2 Spa

34 16

800 700

29192 1373B

22967 15252

~g(gebi~m ~21mQni2 Harpacticoida

52 3

1000 200

44647 2576

25212 5795

2ampQ11Q1202 ampS02Qg~2i2 Chironomid larvae

18 10

700 700

15455 8586

13904 701 0

Mean number of organi$mssample 667 Standard deviation IBB

H ean nurn b er 1 20 f organIsms m 572686 Standard deviation 161750

H = 1 99 SD= 065 SR= 090 J= 060

A-31

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 46: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 17 July 1984 Depth 55 AI

Salinity (bottom) 00 ppt Temperature (bottom) 197 C No of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (X) x S D

Nellatoda 173 1000 14853B 66390 Turbellaria 1 100 859 271 5 ~~~n~hu ini~QA Oligochaeta

1 46

100 1000

859 39496

2715 26293

~gipoundQy~~ygl2 in~rJg~i~ b1nQglYRnY~ Yi( Bivalvia

6 2 1

400 200 100

5152 1717 859

8295 3620 271 5

ei~ IDnH~n~i~ 2 200 171 7 3620 Ostracoda 1 100 959 271 5 biIDQHlh~( Spa ~Q(QRbim ~21Qnisect Diptera pupae

1 94

1

100 1000 100

859 80708

859

2715 35332 2715

Heleidae 1arvae 5 500 4293 4525 Chironomid larvae 1 100 859 2715

Mean number of organismssample 335 Standard deviatiDn 113

Mean number of organismsRI2 287631 Standard deviation 97413

H= 1 86 SO= 064 SR= 155 J= 049

A-32

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 47: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 55 Date 17 July 1984 Depth 18 m Sali nity (bottom) 00 ppt TeAlperature (bottom) 199 C No of samples 10

Frequency Density (nom2 ) occurrence

Taxa (X) x S D

Nematoda 61 1000 52375 33972 Turbellaria 1 100 859 2715 Oligochaeta 24 900 20606 11590 ~~i2QY~k~~1 iOi[2 bimDQ~xlb~r sp ~Q[QQhi~ sectgni~ Chironomid larvae

3 1

38 3

200 100

1000 300

2576 859

32627 2576

5795 2715

19326 4147

Mean number of organismssample 131 standard deviation 54

M b f 2ean num er 0 organIsms 112477 Standard deviation 46757

H= 184 SD= 066 SR= 085 J= 065

bull

A-33

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 48: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 1 August 1984 Depth 58 m Sal i nity (bottoll) 03 ppt Temperature (bottom) 203 C No of samples 10

Frequency Density (nom2) Total occurrence

Taxa nUllber (X) X SD

Nematoda 145 1000 124417 52344 Turbellaria 1 100 859 2715 Mmth~sect iHpoundQ~ Q~~Qi ilQ[i9Oligochaeta

5 3

196

500 300

1000

4293 2576

168286

4525 4147

91064 ~igQYsect~~li int9i Ostracoda

2 3

100 300

171 7 2576

5430 4147

bimnQpoundtl sp ~Q[Q2hiY sectlQni~

240 6

1000 600

206064 5152

73526 4434

sectpoundQtQl poundngnai~Helei dae larvae

1862 1

1000 100

1598713 859

966134 271 ~

Mean number of organismssample 2464 Standard deviation 1156

211 ean num ber 0 f organIsms II 2115590 Standard deviation 992518

H= 124 SD= 041 SR= 089 J= 036

A-34

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 49: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 1S Date 1 August 1984 Depth 24 II

Salinity (bottom) 00 ppt Temperature (bottom) 198 C No of samp I es 10

Frequency Density (nom2) occurrence ---------------- shy

Taxa (X) X S D

Nuertea 1 100 859 2715 Nellatolllorpha 1 100 859 2715 Nematoda 248 1000 212933 108288 Turbellaria 4 400 3434 4434 ~untb~la Hli~g Oligochaeta

4 206

400 1000

3434 176872

4434 75309

~~igQYli~dli i[t~(gi~ ~QtQpound l binQ~ybt2 sp ~2l~bi Q[i ~2tlgtQ(ila tirisect sectpoundQtel poundl9lla Chironomid larvae

10 1

20 205

1 574

9

500 100 800

1000 100

1000 400

8586 859

17172 176013

859 492836

7727

10709 271 5

14021 48104

271 5 150531

13696

Mean number of organismssample 1284 Standard deviation 290

M b f I 2ean nurn er 0 organIsms III 1102442 Standard deviation 2488B5

H= 211 SD= 071 SR= 1 16 J= 057

A-35

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 50: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 1 August 1984 Depth 55 m Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samp 1es 10

Frequency Densi ty _ ltnom2 ) Total occurrence

Taxa number (7) X SD

Nemertea 1 100 859 2715 Nematoda 22 900 18889 15036 Turbellaria 1 100 859 2715 Oligochaeta 19 700 16313 17385 biiQQgl~QhY~ YiCg~~ 2 200 171 7 3620 ~Q[~i~~l~ m2nil~n2i2 ~Q[QehiYm ~lmQni2

4 164

300 1000

3434 140810

6003 103048

Heleidae larvae 8 500 6869 8868

Mean number of organismssample 221 Standard deviation 111

I 2Mean num ber 0 f organIsms m 189751 Standard deviation 95391

H = L 37 SD= 043 SR= 090 J= 046

A-36

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 51: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 55 Date 1 August 1984 Depth 15 m Salinity (bottoll) 01 ppt Temperature (bottom) 204 C No of samples 10

Frequency Density (no 1m2) Total occurrence

Taxa number (i ) X SD

Nemertea 1 100 859 2715 Neutoda 122 1000 104749 7394B Turbellaria 4 300 3434 6003 ~~~~~nt~ secte~poundQa~ Oligochaeta

1 118

100 1000

859 101315

2715 61223

~giQgY~k~~l iot~[m~Qi btbQg~2b~ Y[O ~grQipound~ ~nl~ni b~ngpound~tb~[ Spa

3 1 5 1

200 100 500 100

2576 859

4293 859

5795 2715 4525 2715

~Q[QebiYm ~mQoi sect~QttQ~ ~OQOi Heleidae larvae

42 2 2

800 200 100

36061 171 7 171 7

21341 3620 5430

Chironomid larvae 4 400 3434 4434

Mean number of organismssapIe 306 Standard deviation 169

M b f I 2ean nurn er 0 organIsms m 262732 Standard deviation 145101

H = 198 SD= 067 SR= 1 45 J= 054

A-37

~-- --------------~~-------------

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 52: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 17 August 1984 Depth 61 1

Salinity (bottom) 10 ppt Temperature (bottom) 210 C No of samp 1es 10

Frequency Density (nom2) Total occurrence

Taxa number (X) X SD

Nematoda 240 1000 206064 130213 ~~h~sect limQ tjQ~~Hi~ fQ[i~~ Oligochaeta

31 2

245

400 100

1000

26617 1717

210357

75228 5430

121374 babgglYQbl~ Yi[~sect 1 100 859 2715 Ostracoda 1 100 859 271 5 biQ~xtb~[ Spa ~~Q~~isect ~[pound~Qisect ~Qgebi HQOi

333 2

143

1000 200

1000

28591 4 171 7

1227BO

106553 3620

106860 sectpoundQUg~ poundg~nsectisect 1738 1000 1492247 68441 7

Mean number of organismssample 2736 Standard deviation 944

M b f I 2ean num er 0 organlslls m 2349130 Standard deviation 810600

H= 172 SD= 056 SR= 079 J= 052

A-38

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 53: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 17 August 1984 Depth 27 III

Sal i ni ty (botto) 01 ppt Temperature (bottom) 214 C No of samples 10

Frequency Density (nom 2 ) occurrence

Taxa (X) X SD

Nematoda 186 1000 159700 62468 ~tgt SPa 2 100 171 7 5430 Turbellaria 8 400 6869 8868 ~~ntbg2 imnipoundQ 12 700 10303 11304 Oligochaeta 283 1000 242984 90509 ~~iQQY~~Y~lls inlgtmggisBivalvia

4 1

400 100

3434 859

4434 271 5

~Qt~i~Y nilnsectisectbimnQpoundttbg[s SPa ~QtQQbi~ islmQDi2

1 17

286

100 900

1000

859 14596

245560

271 5 10747 83461

sectpoundetteln poundDsggnsectisect Chironomid larvae

526 4

1000 3Q0

451624 3434

179610 6003

Mean number of organismssapIe 1330 Standard deviation 162

Mean nurn ber I 20 f organIsms m 1141938 Standard deviation 139389

H= 214 SD= 073 SR= 1 06 J= 060

A-39

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 54: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 17 August 1984 Depth 55 II

Salinity (bottom) 01 ppt Temperature (bottom) 220 C ND of samples 10

Frequency Density (nom2 ) Total occurrence

Taxa number (7) x S D

Nematoda 68 1000 58385 27689 Turbellar i a 4 200 3434 8295 Oligochaeta 19 800 16313 13084 ~~i~Q~k~~l~ in~~[m~i bitUQ9Y2bYa Yi[~na Bivalvia

3 3 4

300 300 300

2576 2576 3434

4147 4147 6003

gQ[QipoundYl~ mnilDa 1 100 859 2715 binQpoundY~[ sp gQ[Q2UY a~mgnia sect~Qtgl~n ~n~~ni

2 338

6

100 1000 400

171 7 290207

5152

5430 56636 7240

Mean number of organismssample 448 Standard deviation 72

W b f 2lean num er 0 organlsms II 384653 Standard deviation 61988

H = 1 27 SD= 041 SR= 1 02 J= 038

A-40

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 55: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 55 Date 17 August 1984 Depth 18 m Salinity (bottom) 00 ppt Temperature (bottol) 223 C No of samples 10

Frequency Density (nom 2 ) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 291 1000 249853 118104 Turbellaria 1 100 859 2715 M~ntb~ mni~Q Oligochaeta

1 47

100 1000

859 40354

2715 28347

~~iQQ~sectkY~ll int~[m~gi bitbQQ1YSDY Yi(gn Bivalvia

25 12

6

900 500 400

21465 10303 5152

1231 0 18459 7240

~Q~2ipoundY mnil~ni Ostracoda

11 8

400 600

9445 6869

12442 6773

bmnQpoundYb~r~ SPa 52 1000 44647 19746 ~QrQsbY lmgnisectsQiielo snQ~ni~ Chironomid larvae

43 5

15

1000 400 BOO

36920 4293

12879

21436 6071 8344

Mean number of organismssample 517 Standard deviation 174

M b f I 2ean num er 0 organlsms m 443896 Standard deviation 149431

W = 228 SD= 065 SR= 1 33 J= 062

A-41

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 56: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 29 August 1984 Depth 55 III

Salinity (bottom) 07 ppt Temperature (bottom) 199 C No of samples 10

Frequency Density (noI 2) Total occurrence

Taxa number (X) X SD

Nematoda 192 1000 164851 98380 ~sntbsect limnipoundQlDligochaeta

2 198

200 1000

171 7 170003

3620 67339

~Q[eipoundYls msniln~isect Ostracoda

1 4

100 400

859 3434

2715 4434

bimnQpoundytb[s Spa gQ[Qeniy sect21QOi~ sectpoundQttQlsO poundsOsggOi

164 87

2468

1000 1000 1000

140810 74698

2119025

39283 39460

840890

Mean number of organismssample 311 6 Standard deviation 101 1

ill b f 2nean nUll er 0 organIsms 2675398 Standard deviation 8682B8

W= 116 SD= 036 SR= 060 J= 039

A-42

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 57: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 29 August 1984 Depth 30 bull Salinity (bottom) 00 ppt Temperature (bottom) 202 C No of samples 10

Total Frequency occurrence

Densi ty 2

(nom )

Taxa number (~ ) x S D

Nematoda 150 1000 128790 28905 Turbellaria 7 400 6010 9096 ~nh imni~Qj Oligochaeta ~~i~2Y~k~~1 ini~CIDgii bih2g~Qb~ Yi(~U2 Bivalvi a

B 145

1 1 2

600 1000

100 100 200

6869 124497

859 859

171 7

677 3 84732

271S 2715 3620

~Q[Qi~yli miDllgni bimn2pound~ih~C sp ~QtQehiY imQUia Harpacticoida

7 7

265 1

500 300

1000 100

6010 601 0

227529 859

8145 10747

139462 2715

sect~QtiQDi ~Q~Q~i~ Chironomid larvae

2471 2

1000 200

2121601 171 7

1063112 3620

Mean number of organismssample 3067 Standard deviation 121 9

2Mean number 0 f organIsms m 2633326 standard deviation 1046718

H = 1 09 SD= 034 SR= 1 04 J= 029

A-43

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 58: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 29 August 1984 Depth 55 111

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (noI 2 ) Total occurrence -----------------

Taxa nUllber (X) X SD

Nemertea 4 400 3434 4434 Nuatoda 64 1000 54950 25016 Turbellaria 9 400 7727 11047 ~Hl~b limli~Q19 Oligochaeta

1 37

100 1000

859 31769

2715 19006

i~Qyh il(~~ bHtlQSlheln Yl Bivalvia

4 4

20

200 300 400

3434 3434

17172

8215 6003

26541 ~e(ijY l bQ~dlH sp

26 1

700 100

22324 859

25662 2715

~Q[QQhil iQ sectjgUell HD Heleidae larvae

418 20

1

1000 800 100

358895 17172

859

129443 12799 271 5

Mean number of organismssample 609 Standard deviation 175

nean num b er 0 f organIsms 1 111 2 522887 Standard deviation 150164

H= 176 SD= 051 SR= 1 30 J= 047

A-44

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 59: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

I I

I

I

STATION SS

Date 29 August 1984 Depth 21 1

Salinity (bottom) 00 ppt Temperature (bottom) 208 C No of samples 10

Frequency Density (no2) Total occurrence

Taxa nUllber (X) x S D

Nematoda ISO 1000 128790 37969 Turbellaria 1 100 859 271 5 Oligochaeta 48 1000 41213 16088 ~i~g~sect~~l iQ~~mgi bi~QQg~gb~sect ~i~nsect

10 14

600 600

eSB6 12020

9050 14137

Bivalvia 4 200 3434 7240 ~Q[Q~Yl niQaa Ostracoda

15 7

700 SOO

12879 6010

15806 7069

bmQg~~~b~ SPa 14 800 12020 8295 ~g[gaby mgni sect~g~~Qn ~ngnai Chironomid larvae

IB4 25 9

1000 900 700

157982 21465

7727

35563 16810 6335shy

Mean number of organismssample 481 Standard deviation B6

2Mean number 0 f organlsms m 412987 Standard deviation 74131

H= 24S SD= 074 SR= 1 23 J= 068

A-45

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 60: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 45 Date 14 September 1984 Depth 61 11

Salinity (bottom) 03 ppt Temperature (bottom) IB4 C No of samples 10

---------------------------------~----------------------------------------

Taxa TotalnUlllDer

Frequency occ~~~ence

Density (no 2) -----X-------sect7B

Nematoda 189 1000 162275 85233 t1tQ SPa

Turbellaria 2 2

200 100

171 7 171 7

3620 5430

~~~nIng limoifQl t1QQQDi~ flQriQ Oligochaeta

5 19

142

400 800

1000

4293 1631 3

121921

6071 12442 30504

~QQifYl mDl~D bimoQpoundt1hgr Spa Cumacea

19 184

2

800 1000 200

1631 3 157982

171 7

130B4 69541 3620

~Q[QnniYm ~~lmQDi Harpacticoida

118 1

1000 100

10131 5 B59

43367 2715

sectfQIIQD fOQgO Chironomid larvae

1780 1

1000 100

1528308 859

673586 2715

Mean number of organismssample 2464 Standard deviation 874

M ean num b er f 20 organlsms 2115590 Standard deviation 750305

H= 151 SD= 046 SR= 1 07 J= 041

A-46

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 61: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 18 Date 14 September 1984 Depth 21 III

Salinity (bottom) 01 ppt Temperature (botto) 182 C No of samples 10

Frequency DenSity (nom 2 ) Total occurrence ---------------- shy

Taxa nUlDber (i) X SD

Nemertea 1 100 859 271 5 Nematoda 186 1000 159700 44925 Turbellaria 16 400 13738 20717 ~~Dth~~ limni~Ql Oligochaeta

13 55

700 900

11162 47223

9096 30085

~Q~ei~Yl nil~Qi~ 17 900 14596 7069 bimDg~lbg[ Spa b 500 5152 6003 ~Q[Q2niY ~lgQi~ Harpacti coi da

562 2

1000 200

482533 171 7

136766 3620

sectpoundQttQ~Q~ ~n~ni 791 1000 679153 324290

Mean number of organismssample 1649 Standard deviation 447

I 211ean nUll ber 0 f organIsms I 1415831 Standard deviation 384136

H= 179 SD= 064 SR= 084 J= 054

A-47

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 62: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

STATION 58 Date 14 September 1984 Depth 58 III

Salinity (bottom) 01 ppt Temperature (bottom) 191 C No of sampl es 10

-------------------------------------------~------------------------------Frequency Density (nom 2 )

Total occurrence Taxa number eX) X SD

Nemertea 1 100 859 2715 Nematoda 55 1000 47223 18658 Turbellaria 10 500 8586 11448

1 100 859 2715 Oligochaeta 41 1000 35203 17850 ~~iQQ~~gll iu1g[m~i ~Q[Q~Yl nilD bimnQ~Y~h[ Spa ~Q[Q~hiYm lmgui sectpoundQilg1D poundU2D Chironomid larvae

4 10

2 277

23 4

100 500 200

1000 700 300

3434 8586 171 7

237832 19748 3434

10861 11448 3620

50561 21051 6003

Mean number of organismssample 428 Standard deviation 51

M b f 2ean num er 0 organIsms III 367481 Standard deviation 43743

H= 179 SD= 055 SR= 114 J= 052

A-48

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 63: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

I I

STATION SS Date 14 September 1984 Depth 21 II

Salinity (bottom) 01 ppt Temperature (bottom) 190 C No of samples 10

--------------------------------------------------------------------~-----

Frequency Density (no1I2) Total occurrence ---------------- shy

Taxa number (X) X SD

Nematoda 102 1000 87577 39200 Oligochaeta 34 700 29192 31142 ~iQ2Y~y1 int(mgi~ bithQgl~en~ Yi(gDsect ~Q(~i~Y m~DilgDsecti~ bimDQamp~1h(sect sp ~2(QQhiY slmQD 2poundQiiQlsD ~sD~g~nsecti Chironomid larvae

36 18 16 17

100 16

3

1000 600 800 700

1000 800 300

30910 15455 13738 14596 85860 13738 2576

157BO 20953 10078 14621 32126 10861 4147

Mean number of organismssample 342 Standard deviation 97

2Mean nUllber 0 f organlsms m 293641 Standard deviation 83617

H= 262 SD= 079 SR= 095 J= 083

A-49

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 64: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Appendix B--Sediment particle size and organic content of the Cathlamet Bay

benthic invertebrate sites 13 March through 14 September

1984

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 65: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

iii

1

Station 18a 48 54 57

Survey 1 1 1 1

Month March March March March

Day 13 13 13 13

Particle size (mm) Phib Percent by weight

gt 40 -2 000 000 000

20- 40 -1 000 000 000

10- 20 0 000 009 000

05- 10 1 018 1079 032

025- 050 2 545 7583 2468

0125- 025 3 8731 1225 6783

00625-0125 4 491 037 657

lt0625 (5-12) 216 067 060

Organic Content 160 116 128

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

b Phi= -log2(sediment particle diameter in mm)

B-1

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 66: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station 18a 48 54 57

Survey 2 2 2 2

Month April April April April

Day 5 5 5 5

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 003 093 000

05shy 10 1 005 31 75 023

025shy 050 2 087 5904 2368

0125- 025 3 6316 750 7155

00625-0125 4 3056 026 427

lt0625 (5-12) 533 052 028

Organic Content 081 077 065

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-2

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 67: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station 45 55 58

Survey 3 3 3 3

Month April April April April

Day 18 18 18 18

Particle size (mm)

gt 40

Phi

-2

Percent by weight

000 000 000

20shy 40 -1 000 000 000

10shy 20 0 005 009 004

05shy 10 1 010 027 013

025shy 050 2 015 095 225

0125- 025 3 097 536 6111

00625-0125 4 453 2821 2205

lt0625 (5-12) 9420 6511 1442

Organic Content 31 42 14

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-3

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 68: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station 18a 45 55 58

Survey 4 4 4 4

Month May May May May

Day 4 4 4 4

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 021

05shy 10 1 000 065 063

025shy 050 2 012 370 230

0125- 025 3 091 4099 4696

00625-0125 4 322 3650 3052

lt0625 (5-12) 9575 1810 1939

Organic Content 330 180 160

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-4

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 69: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

5

May

17

000

000

005

016

217

5862

2729

1170

100

45 55 58

5 5 5

May May May

17 17 17

Percent by weight

000 000

000 000

005 008

113 031

325 274

1903 5613

2784 2401

4870 1672

240 110

000

000

000

010

020

079

397

9494

390

B-5

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 70: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station 18al 45 55 58

Survey 6 6 6 6

Month June June June June

Day 6 6 6 6

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 000 008 020

05shy 10 1 005 051 027

025shy 050 2 005 301 1 79

0125- 025 3 074 3189 5404

00625-0125 4 599 4118 2885

lt0625 (5-12) 9317 2332 1485

Organic Content 340 240 150

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-6

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 71: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station

Survey

Month

Day

Particle size Cmm) Phi

gt 40 -2

20shy 40 -1

10shy 20 a

05shy 10 1

025shy 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

7

June

18

000

000

005

029

138

3917

4143

1768

180

45

7

June

18

55 58

7 7

June June

18 18

Percent by weight

000

000

000

010

020

080

427

9464

310

000 000

000 000

000 007

011 022

057 190

957 5286

3023 2642

5957 1853

1 70 110

B-7

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 72: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station 18al 45 55 58

Survey 8 8 8 8

Month July July July July

Day 2 2 2 2

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000

20shy 40 -1 000 000 000

10shy 20 0 006 002 006

05shy 10 1 006 0l3 023

025shy 050 2 017 088 171

0125- 025 3 074 2712 5365

00625-0125 4 552 3892 3081

lt0625 (5-12) 9345 3294 l354

Organic Content 410 210 160

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-8

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 73: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

9

July

17

000

000

003

013

130

4294

4434

1127

130

45

9

July

17

Percent

000

000

000

006

012

051

046

9885

290

55

9

July

17

by weight

000

000

019

048

091

628

3616

5597

030

58

9

July

17

000

000

004

022

158

5017

3148

1650

140

B-9

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 74: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station

Survey

Month

Day

Particle size (mm) Phi

gt 40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18al

10

August

1

45

10

August

1

55

10

August

1

58

10

August

1

Percent by weight

000 000

000 004

001 004

009 018

018 088

098 306

049 2510

9824 7070

000

005

045

763

3604

4495

932

156

100 190 060

al Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

B-10

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 75: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station 18 45 55 58

Survey 11 11 11 11

Month August August August August

Day 17 17 17 17

Particle size (mm) Phi Percent by weight

gt 40 -2 000 000 000 000

20- 40 -1 005 000 000 000

10- 20 0 021 003 000 210

05- 10 1 064 009 000 159

025- 050 2 226 027 045 2656

0125- 025 3 3259 131 712 3719

00625-0125 4 4327 195 1737 1159

lt0625 (5-12) 2098 9635 7506 2097

Organic Content 210 300 160 100

Ii I

B-11

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 76: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

Station

Survey

Month

Day

Particle size (mm) Phi

gt40 -2

20- 40 -1

10- 20 0

05- 10 1

025- 050 2

0125- 025 3

00625-0125 4

lt0625 (5-12)

Organic Content

18

12

August

29

000

000

012

046

186

3465

4498

17 93

241

45

12

August

29

55 58

12 12

August August

29 29

Percent by weight

000

000

002

009

026

118

189

9656

540

000 000

000 000

003 011

011 028

055 1013

859 5033

1596 1827

7476 2089

1 70 120

B-12

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13

Page 77: J. · collected in Cathlamet Bay, Oregon, during March through September 1984. APPENDIX B.--Sediment particle size and organic content of the Cathlamet Bay benthic invertebrate sites

a Sample being saved for hydrocarbon and petroleum testing in relation to the MOBILOIL oil spill 19 March 1984

_-------------------- shy

B-13