ADDENDUM 304(9)-7 INVENTORY OF HYDROPHYTIC …
Transcript of ADDENDUM 304(9)-7 INVENTORY OF HYDROPHYTIC …
ADDENDUM 304(9)-7
INVENTORY OF HYDROPHYTIC VEGETATION AT TWELVE SPRING/SEEP SITES IN THE BULL MOUNTAINS MINE NO. 1 STUDY AREA, 1991
CONTENTS ADDENDUM 304(9)-7
Page
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . 7-3
METHODS . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
HYDROPHYTIC VEGETATION MONITORING PROGRAM . . . . . . . . 7-10
DATA SUMMARIES
COVER . . . . . . . . . . . . . . . . . . . . . . . 7-11 PRODUCTION . . . . . . . . . . . . . . . . . . . . . 7-54 SHRUB DENSITY . . . . . . . . . . . . . . . . . . 7-61
ACREAGES . . . . . . . . . . . . . . . . . . . . . . 7-62
HYDROPHYTIC VEGETATION MAPPING . . . . . . . . . . . . . 7-63
7-2 (Rev. 6/92)
Baseline hydrophytic vegetation information is a component of an
interdisciplinary assessment of potential impacts/mitigation
measures for potentially affected hydric sites in the Bull
Mountains Mine No. 1 study area. Documentation of hydrophytic
vegetation involved detailed quantitative sampling of all
springs/seeps within the permit area during 1991. Other
spring/seep sites in the mine plan area will be quantitatively
sampled during subsequent terms of permit.
INTRODUCTION
Hydrophytic vegetation in the study area frequently shows
pronounced compositional zonation, primarily related to
hydrologic gradient and water chemistry. Due to zonation within
these relatively small sites, sampling methodoly differed from
that used to inventory upland sites, although the same
parameters were sampled. At each site, hydrophytic zones were
identified according to plant composition and structure.
Quantitative data were collected on permanent transects
established at each spring/seep site. These baseline data will
serve to initiate the hydrophytic vegetation monitoring
program.Transects were positioned across hydrophytic sites,
perpendicular to the direction of drainage. Transect end points
were permanently marked with rebar stakes driven into the ground
several meters outside the perimeter of hydrophytic vegetation
influence (adjacent upland vegetation composition was
METHODS
7-3
identified qualitatively). Plastic caps on each stake designated
transect number and orientation. The number and spacing of
transects at each site was determined by areal extent and
configuration of hydrophytic vegetation, with the goal of
characterizing composition and structure of each zone throughout
a spring/seep site.
At each transect, a fiberglass tape was loosely stretched
between the end points. Each hydrophytic zone was identified by
one to three dominant species, and line intercept along the
transect was measured to the nearest decimeter for each zone. A
0.5m2 (1.0 x 0.5-meter) rectangular plot was placed at the
center of line intercept of each zone, and cover values were
recorded to the nearest percent for ground cover classes (bare
ground, rock, litter, surface water, moss, algae and basal
vegetation), total vascular vegetation and each vascular plant
species. Zones dominated by the same species were sometimes
sampled for cover more than once per transect, depending on line
intercept.
At each site, selected 0.5 m2
7-4
cover plots were harvested in each
zone to estimate annual production. Number of plots were
determined according to structural diversity within a zone.
Plots were selected in homogeneous, representative stands in
each zone, and clipped to ground level. Separation of plant
material (morphological class) was the same as described for
upland production sampling. Where minor grazing had occurred on
unprotected sample sites, utilization was estimated to calculate
total production.
Shrub density was determined by counting all individuals by
species in each 0.5m2
It is intended to sample 3-5 spring/seep sites in or near the
mine plan area (depending on land ownership considerations),
well removed from the projected five-year affected area. These
will serve as control sites, to assist in interpretation of any
significant changes in hydrophytic vegetation parameters.
Control sites will be chosen to reflect the variability of
hydrophytic vegetation at baseline inventory sites in the permit
area, in consultation with regulatory personnel. Sampling of
control sites will follow the same procedures described for the
permit area, including establishment of permanent transects.
plot. Densities were recorded by age class
and size class as described for upland sampling.
Vegetation associated with springs, seeps, impoundment perimeters
and receiving drainages differs compositionally from adjacent
uplands,dominated by hydrophytic species with substantially
higher annual production. These sites diversify wildlife habitat
within the area and provide higher forage values for livestock
and wildlife. The relationship between upland community types
and hydrophytic community types in the Bull Mountains Mine No. 1
study area is similar to that reported for other studies in the
ponderosa pine forest zone in eastern Montana (e.g. Culwell and
Scow 1982, Culwell et al. 1985, Scow in press).
RESULTS
7-5
The twelve spring/seep sites inventoried in 1991 are evaluated
below. Significant hydrophytic parameters include species
composition (native vs. introduced taxa), species diversity,
zonal diversity, areal extent and disturbance history. Most
parameters reflect the normal range of hydrophytic variability
in the region (eastern sedimentary plains of Montana as defined
by the USDA Soil conservation Service). Essentially all sites
inventoried have been manipulated ("improved"), which has in
general increased the diversity of hydrophytic zonation at the
largest sites. Establishment of introduced plant taxa is
comparable to other inventories of hydrophytic sites in the
region.
Dominance types and line intercept are listed for each permanent
transect in Addendum 304(9)-7A. Cover data for the 1991
inventory are tabulated in Addenda 304(9)-7B through 7G.
Production data are given in Addenda 304(9)-7H through 7J, and
shrub density data are in Addendum 304(9)-7K. Hydrophytic
vegetation is mapped in Figures 304(9)-9 through 304(9)-23.
SITE 14325
Species composition was typical (introduced plant species well
established), species diversity was high and a diversity of
hydrcphytic zones was present, due to areal extent in
conjunction with site enhancement. The degree of site
manipulation is pronounced due to creation of artificial
impoundments. A fence dissects the site, and livestock
utilization was much more evident east of the fence at the time
of sampling.
7-6 (Rev. 6/92)
SITE 14415
Introduced plant species were not well established, species
diversity was typical and zonal diversity was low. The degree of
site manipulation is moderate due to an artificial impoundment.
Livestock utilization was not apparent at time of sampling.
SITE 14535
Introduced plant species were conspicuous, and species diversity
and the diversity of hydrophytic zones were typical of regional
hydrophytic sites, despite limited extent of this site. The
degree of site manipulation and other disturbance (spring 1991
flooding) was moderately evidenced at time of sampling.
SITE 16365
Species composition was typical (introduced plant species well
established) and species diversity relatively pronounced, with
diversity of hydrophytic zones restricted due to limited extent
of the site. The degree of site manipulation, livestock
utilization, and/or other disturbance was noteworthy at time of
sampling.
SITE 16625
Species composition was generally dominated by native plants,
species diversity was typical of regional hydrophytic sites and
zonal diversity was typical of regional hydrophytic sites,
despite limited areal extent. The degree of site manipulation,
livestock utilization, and/or other disturbance was moderately
evidenced at time of sampling.
7-7
SITE 16655
Species composition was typical (introduced plant species well
established), species diversity was relatively pronounced and a
diversity of hydrophytic zones was present, due to areal extent
in conjunction with site enhancement. The degree of site
manipulation, livestock utilization, and/or other disturbance
was moderately evidenced at time of sampling.
SITE 16755
Introduced plant species were very conspicuous,species diversity
was relatively depauperate and zonal diversity was typical of
regional hydrophytic sites, despite limited areal extent. The
degree of site manipulation, livestock utilization, and/or other
disturbance was noteworthy at time of sampling.
SITE 16855
Species composition was generally dominated by native plants,
species diversity was relatively depauperate and the diversity
of hydrophytic zones was restricted due to limited extent of the
site. The degree of site manipulation, livestock utilization,
and/or other disturbance was moderately evidenced at time of
sampling.
SITE 16955
Species composition was typical (introduced plant species well
established), species diversity was typical of regional
hydrophytic sites and diversity of hydrophytic zones was
restricted despite extent
7-8
of site. The degree of site manipulation, livestock utilization,
and/or other disturbance was not noteworthy at time of sampling.
SITE 17415
Introduced plant species were very conspicuous, species
diversity was typical of regional hydrophytic sites and zonal
diversity was typical of regional hydrophytic sites, despite
relatively large areal extent. The degree of site manipulation,
livestock utilization, and/or other disturbance was noteworthy
at time of sampling.
SITE 17515
Species composition was typical (introduced plant species well
established), species diversity was typical of regional
hydrophytic sites and a diversity of hydrophytic zones was
present, due to areal extent in conjunction with site
enhancement. The degree of site manipulation, livestock
utilization, and/or other disturbance was moderately evidenced
at time of sampling.
SITE 17685
Species composition was generally dominated by native plants,
species diversity was typical of regional hydrophytic sites and
a diversity of hydrophytic zones was present, due to moderate
areal extent in conjunction with site enhancement. The degree of
site manipulation, livestock utilization, and/or other
disturbance was noteworthy at time of sampling.
7-9
Hydrophytic vegetation parameters (except production) will be
monitored using the permanent transect methodology detailed
earlier. All transects established in 1991 will be included in
the monitoring program. Monitoring will be conducted every five
years unless significant changes in the hydrologic regime are
detected at a site, in which case monitoring will be conducted
within one growing season of such change and annually thereafter
until a return to a five-year monitoring schedule is approved by
MDSL. This will require close coordination with the hydrology
monitoring program. Significant changes will be determined by
Meridian in consultation with the Department. Monitoring will be
suspended at a site when species composition data indicate that
hydrophytic vegetation is greatly reduced or absent, in
consultation with regulatory personnel.
HYDROPHYTIC VEGETATION MONITORING PROGRAM
7-10 (Rev. 10/92)
Addendum 304(9)-7A. Dominance types and line intercept by transect, spring/seep inventory of hydrophytic vegetation, Bull Mountains Mine No. 1, 1991.
SITE 14325
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Art can/Sti vir 3.8 (Rhu tri)
1 Cir arv/Spa pec 2.2
2 Car neb/Car lan 6.7
3 Typ lat 3.7 12” water
- Pond (Typ lat) - no end pin (pond)
- Art can/Sti vir _ no end pin (pond)
TRANSECT 2
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Cal lon/Agr smi 1.3
- Muh ric 1.0 Atypical microsite
1 Spa pec/Amb psi 2.8
2 Car neb/Ele pal 6.9
- Poa pra/Agr sto/
Ast fal
6.8
SITE 14415
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Pin pon/Sym occ 1.8 (Rhu tri)
1 Sce ame/Ele pal 8.3
- Pin pon/Sym occ 3.2
7-11 Addendum 304(9)-7A. Continued)
SITE 14415 (continued)
TRANSECT 2
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Art can/Sti vir 2.0
1 Car neb/Car pra 8.6
- Sti vir/Agr smi 3.0 (car lan)
- Pin pon/Sym occ 1.7 (Sym occ, Muh ric)
SITE 16365
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Gut sar/Agr smi 2.5 Shale breaks
1 Sci ame/Ele pal 3.9
2 Fes aru/Hor bra 8.1
- Agr smi/Poa pra 3.3
- Art can/Sti vir 4.6
TRANSECT 2
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Agr smi/Poa pra 2.6
1 Ele pal/Hor bra 2.9
- Sti vir/Agr smi 0.9 (Art can/Sti vir On
Slope above)
7-12
Addendum 304(9)-7A. (Continued)
SITE 16365
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)***
COMMENT
-
Burned
Pin pon/Sti vir
1.5
- Phl pra/Poa pra/
Cir arv
1.5 Weedy toe of bank
1 Car neb/Cat aqu 3.3
- Sol can/Phl pra 0.7
- Sti vir/Agr smi 1.9 (Phl pra)
TRANSECT 2
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Pin pon/Sti vir 3.0
- Burned
Pin/pon/Pru vir
2.8 Weedy toe of bank
1 Cat aqu/Vera me 1.5 narrow zone in
central, wettest
portion
2 Car lan/Car nep 3.5
- Sol can/Phl pra 0.7 weedy toe of bank
- Pin pon/Sti vir 1.9
7-13
Addendum 304(9)-7A. (Continued)
SITE 16625
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Agr smi/Poa pra 2.1 Lower bank
1 Car neb/Sci ame 5.1
2 Car nep/Car pra 3.5
3 Agr can/Muh asp 1.4
- Agr smi/spa gra 2.2 Art can/Sti vir
upslope
SITE 16655
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Sym occ/Poa pra 1.2 (Agr sto)
1 Car lan/Agr sto 1.4
2 Car neb/Car lan 5.7 (Agr sto)
3 Car lan/Car neb 3.0 (Ele pal)
4 Car lan/Car pra 1.1
- Agr smi/Poa pra 1.7
TRANSECT 2
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Agr sto/Phl pra 2.1
1 Car neb/Car lan 7.4
2 Car pra/Agr sto 5.0
- Agr smi/Agr sto 2.5 Art can/Sti vir
upslope
7-14
Addendum 304(9)-7A. (Continued)
SITE 16655 (Continued)
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Sym occ/Poa pra 0.8
1 Car neb/Car lan 4.8
- Car neb/Car lan 0.4 Sparse Car neb
1 Car neb/Car lan 3.1
2 Car neb/Car pra 1.6 (Agr sto)
- Agr smi/spa gra 1.6 toeslope
SITE 16655-B
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Cal lon/Agr smi 2.0 (Art can)
1 Car lan/Car pra 4.0 (Agr sto)
2 Car neb 5.8
3 Ele pal 1.0 (Agr sto)
- Agr smi/Poa pra 2.3 Sym occ/Art can
upslope
7-15
Addendum 304(9)-7A. (Continued)
SITE 16755
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Agr smi/Poa pra 4.4
1 Pha aru 2.9
2 Poa pra/Car neb 4.2
3 Car neb/Sci ame 4.7
- Agr smi/Agr can 3.3 (Rosa)
- Bare soil 0.3 Dozed bank
- Sti vir/Agr smi 0.9 Burned Pin pon/Agr spi
Upslope
SITE 16855
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Chr nau 3.0 Clay breaks
1 Poa ari 7.0
2 Sci ame/Ele pal 7.0 (Jun bal)
3 Poa ari 3.0 (see plot #1)
- Barren clay shale 0.9
TRANSECT 2
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Gut sar 1.8 Shale – clay bank
1 Sci ame/Spa pec 3.8
- Eri pau/gut sar 2.3 Clay – shale bank
7-16
Addendum 304(9)-7A. (Continued)
SITE 16955
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** 1
COMMENT Cal lon/Agr smi (Poa pra)
18.8 Sti vir/Agr smi Upslope
2 Car lan 6.6 (Agr smi)
- Sti vir/Agr smi 3.8
SITE 17415
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Agr smi/Poa pra 2.1 Art can/Sti vir
Upslope
1 Sci ame/Ele pal 2.5
- Soil/rock bar 4.1 Recent deposition from
Upslope dozer cut
- Sci val 0.8 See transect #2 Plot #2
2 Car lan/Sci ame 1.6 (Pol mon)
- Art can/Sti vir 2.6
TRANSECT 2
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Art can/Sti vir 2.7
1 Hor jub/Ele pal 0.8 (Pol mon)
2 Sci val 6.3
3 Sci ame/Hor jub 2.0 (Pol mon)
- Agr smi/Agr can 2.7
- Art can/Sti vir 2.7
7-17
Addendum 304(9)-7A. (Continued)
SITE 17515
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Sti vir/Agr smi 2.4
1 Car lan/Agr rep 2.0
2 Car lan/Sci ame 5.6
- Rock channel 1.0 3 Car lan/Sci ame 1.5 (June bal, Agr sto)
4 Agr sto/Poa pra 1.3 Weedy terrace
- Sti vir/Agr smi 1.4
TRANSECT 2
PLOT NO.*
LINE INTERCEPT
DOMINANCE TYPE **
(Meters)***
-
COMMENT
Agr rep/Agr smi 2.6 Weedy
1 Sci ame 2.3
2 Car neb 5.0
3 Poa pra/Agr sto 0.3
- Sti vir/Agr smi 1.8
7-18
Addendum 304(9)-7A. (Continued)
SITE 17685
TRANSECT 1
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Agr can/Gri squ 2.0 (scattered Pin pon)
1 Ele pal 1.2 (sci val)
2 Puc nut 2.5
3 Ele pal 0.8 4 Sci ame/Ele pal 2.6
- Agr can/Gri squ 1.6
TRANSECT 2
PLOT NO.* LINE INTERCEPT
DOMINANCE TYPE ** (Meters)*** -
COMMENT Sti vir/Agr smi 1.8 (Art can)
1 Car par/Muh asp 2.5
2 Sci ame/Ele pal 8.2
3 Car lan/Poa pra 1.5
- Sti vir/Agr smi 1.5 (Agr can)
*Only hydrophytic vegetation plots were quantitatively sampled – see Addenda 304(9)-7B through 7G for canopy cover data and 7H through 7J for annual production data. **Dominance types are on-site ocular estimates of zonal extent – species codes are explained in Addendum 304(9)-1. ***Line intercept measurements are from fiberglass tape stretched loosely between permanent rebar stakes established for each transect.
7-19
ADDENDA 304(0)-7B through 7G
PERCENT CANOPY COVER BY QUADRAT FOR SPRING/SEEP SITES SAMPLED IN THE
BULL MOUNTAINS MINE NO.1 STUDY AREA, 1991.
SPRING/SEEP DESIGNATION
ADDENDA 304(9)-
PAGE
14325 14415 14535 16365 16625 16655
16655-B 16755 16855 16955 17415 17515 17685
7B 7B 7B 7C 7C 7D 7D 7E 7E 7E 7F 7F 7G
7-21 7-21 7-21 7-27 7-27 7-32 7-32 7-37 7-37 7-37 7-43 7-43 7-49
FOOTNOTES for the canopy cover tables in this Addendum: T (Trace) is a cover value assigned 0.5 percent for each 0.52m quadrant. X represents incidental species recorded in each hydrophytic compositional zone represented by a 0.5m2 quadrant. Binomials are from USDA Forest Service (1987).
7-20
Addendum 304(9)-7K. Shrub density (stems/m ) by plot*, spring seep inventory of hydrophytic vegetation, Bull Mountains Mine No. 1 study area, 1991.
SITE 14325
Transect 1, Plot 1 Stems/mRosa woodsii
2
Seedling Immature
4 2
SITE 16655
Transect 1, Plot 1 Stems/mSymphoricarpos occidentalis
Seedling
2
2
*Shrubs were encountered on only two of all 0.5m2
7-61
quadrats sampled in hydrophytic vegetation during the 1991 inventory.
Addendum 304(9)-7L. Acreage of hydrophytic vegetation and water for twelve spring/seep sites sampled in 1991, Bull Mountains Mine No. 1 study area.
SPRING/SEEP HYDROPHYTIC VEGETATION
SITE WATER
(ACRES)
ACRES
14325 1.55 0.41 14415 0.66 0.03 14535 0.35 - 16365 0.09 - 16625 0.32 - 16655 1.92 0.07 16755 0.06 - 16855 0.12 - 16955 0.54 - 17415 0.63 0.09 17515 0.45 0.04 17685 1.25 0.01
Permit Area Total 5.38 0.21 Twelve Site Total 7.94 0.65
7-62
HYDROPHYTIC VEGETATION MAPPING
FIGURE SPRING/SEEP 304(9)-_ DESIGNATION
PAGE
9 14535 7-64 10 14415 7-65 11 14325 7-66 12 16955B 7-67 13 16955 7-68 14 16855, 16655B 7-69 15 166558 7-70 16 16755 7-71 17 16655 7-72 18 16625 7-73 19 17515 7-74 20 17685B 7-75 21 17685 7-76 22 16365 7-77 23 17415 7-78
Location of these figures is shown on Map 304(9)-15.
7-63 (Rev. 6/92)