426 S. Mr. J. Bot. 1997,63(6) 426-435

A revised list of seaweeds from Inhaca Island, Mozambique

A.T. Critchley', M.E. Aken" S. Bandeira' and M. Kalk3

*Department of Botany, University of the Witwatersrand, Private Bag Wits 2050 Republic of South Africa

1 Department of Botany , University of Natal, P.O. Box 375 , Pletermaritzburg 3200. Present address: AMCOAL,

Environmental Services, P.8ag X9, Leraatsfontein

2University Eduardo MondJane, Department of Biology, Private Bag 375, Maputo , Mozambique

30epartment of Zoology, University of the W itwatersrand , Johannesburg, Private Bag 3, P.O. Wits 2050 Republic

of South Africa (deceased)

Received 25 April 1997; revised 23 September 1997

An updated compilation of marine algae for Inhaca Island, Mozambique is provided. The list comprises 205 species

and infraspecific taxa (64 Chlorophyta, 23 Phaeophyta and 118 Rhodophyta) . Nineteen of the seaweeds (9% of all records) have recently been placed into synonymy. The most common orders are Cladophorales (including

Siphonocladales), Caulerpales, Gigartinales and Rhodymeniales. A R+c/p ratio of7 .91 ind icates strongly the presence

of a tropica l seaweed flora.

Keywords: Inhaca Island, Mozambique, sub-tropical seaweed flo ra , Indian Ocean, southern Africa.

"To whom correspondence should be addressed.

Introduction

The benthic intertidal seaweed flora of the east coast of southern Africa is documented and summarized in a number of publica­tions (see Seagrief 1980, for Maputaland; Bolton & Stegenga 1987, for Transkei; Seagrief 1988, for the Eastern Cape; Bolton & Stegenga 1990, for Cape Agulhas; Bolton el al. 1991, for False Bay; Jackelman el al. 1991, for Cape Hangklip and Farrell el al. 1993 1994 for KwaZulu-Natal). In contrast, there is rela­tively little information available from the marine sublittoral zone of South Africa (but see Anderson & Stegenga 1989). How­ever, Inhaca Island, Mozambique has attracted considerable attention from marine biologists. Isaac (1956) first investigated the marine algal flora of the island to obtain data relating to the distribution of seaweeds in the then Union of South Africa. Sub­sequent accounts of components of the marine flora appeared in Post (1957), Chamberlain (1958), Isaac (1958 1959) and Isaac and Chamberlain (1958). Pocock (1958) published the first checklist for the island. Additions to the list have been made by subsequent authors and particularly those associated with the International Indian Ocean Expedition of 1962 (viz. P. Silva 1959; Taylor 1967; Saenger t971, 1973; Wollaston 1984 and Lambert el al. 1987). A biogeographic analysis of the island's seaweed flora was produced by Critchley el at. (1994). This present report represents the, as yet unpublished, species Jist used in that analysis) . Separate lists of cyanobacteria in nine families containing 26 genera have been prepared for the island (Silva 1991 a,b,c; Silva & Cuamba 1991). Further details on the general ecology of the island and adjacent Mozambique mainland can be found in Isaac (1957), Kalk (1959), Day (1974), Stephenson and Stephenson (1972) and Kalk (1995).

Inhaca Island forms part of a natural barrier between Maputo and the Indian Ocean, on the east of Maputo Bay, at 26°00'S lati­tude and 32°55'E longitude. The island falls under the influence of the southerly-flowing tropical Mozambique Current (Macnae & Kalk 1958; Macnae 1962, 1995), which runs along the conti­nental shelf approximately eight kilometres off the eastern shore. The Mozambique Current has a core temperature of 2 5°C and its waters circulate in a mini-gyre towards Maputo Bay (De Freitas 1984).

Surface seawater temperatures on the east coast of Inhaca Island are usually about 24.5°C in contrast to the west coast

where the shallower waters of Maputo Bay can be warmed con­siderably by insolation and reach temperatures in the upper 20's (Isaac 1937; Macnae & Kalk 1958, 1962; Kalk 1995). The island is also influenced, to some degree, by an erratic counter-current which may flow northward above the continental shelf (inside the Mozambique Current), bringing cooler waters to the east coast of Inhaca in winter. These phenomena result in marked temperature differences between the east and west coasts of the island. Similarly, differences in salinity exist between the eastern shores of the island (c.3 5.54%) and Maputo Bay shores, which receive freshwater influences (c.30- 33.9%; Macnae & Kalk 1962).

The tidal range of extreme spring tides at I nhaca is 3.7 m, with an average of 3.3 m (Macnae & Kalk 1962), which compares with a maximum of less than 2.0 m for neighbouring South Africa (Bauer 1933). Tides are semi-diurnal, with two high and two low tides per day. Spring low tides occur between 09h30-13hOO (being more pronounced between 12hOO-I3hOO) and 22hOO-01 hOO, thus low water of spring tides (L WST) occurs dur­ing the heat of the day (mean annual air temperature range is 18.7-26.9'C; Macnae & Kalk 1958, 1962; Kalk 1995). The coin­cidence of low spring tides with the hottest part of the day is a factor that severely limits algal distribution above the mean tide level of the shore (Kalk 1954; Isaac 1958). Dense seaweed vege­tation occurs on rocky shores only, such as those on the north-eastern end of the island. The wide belts of algae present are made more visible by the gently sloping shores and the large tidal range, exposing extensive tracts of beach at low water. Some of the island's sandy shores also provide varied substrata for colonization by sand-adapted algae (e.g. Calilerpa spp. and Udolea spp.; Isaac 1958). Isaac (1956) reported that there were reasons to believe there is more luxuriant growth of marine algae during the summer months but this statement remains uncorroborated.

This paper presents a revised list of marine algae for Inhaca Island, Mozambique. A number of these algae are of potential economic value and warrant further study as a source of colloid, secondary products (b iologically active compounds) or food (Aingworth 1996; Vlachos el al. 1996; Gillespie el al 1997).

S. Afr. J. Bot. 1997.63((,)

Materials and Methods Specimens of Inhaca Island seaweeds wefe either examined from 4% fonnalin-lixl!d mati!rial or herbarium voucht!rs which are depos­iled in The Alhany Museum (GRA), Grahamstowl1, South Africa (M.A. Pllf.:OCK collection): The Moss Herbarium (J). University of thl! Witwut(;rsrand. Johannesburg, South Africa (C.E. Moss, col­lected 193X: W.E. Isaac collected 1954/56; R.L. Davidson collected. 1955; AC,O Mogg collected 195&-60 and 1979; F.D. Hancock col­It.:ctcd 1460 and R.N. Pienaar and S. Sym col1ected 1989) and the Universidaue Eduardo Mondlanc (LMU). Maputo. Mozambique (1. de KOlling and E.M.C. Groencndijk collected 1984).

Rd~rcnccs for idl.!ntitication include Jaasund (1976). Simons ( 1976) and Sen grief ( 1980. 1988); some species, however. required the use of other taxonomic publications: viz. Kylin (1938). Levring (1938). Papenfuss ( 1947). P.Si lva (1959). Simons (1966). Lawson and John (1982). Norris and Aken (1985). Norris (1986. 1987a.b and c). Norri s c!1 al (1987) and Chamberlain and Keats (1994) \vere also consulted. Nomenclature. where appropriate, follows Seagrief ( 1984) and dassiticatiotl is taken from Seagrief (1980) nnd Wynne and Kraft ( 198 1). Taxonomic and nomenclatura l changes have been chcl:ked against Papenfuss et al. (1982), King and Puttock (1989). i-Iu isman and Borowitzl\a ( 1990) and P.S i1 va Itt al. (1987. 1996). The taxonomy and nomcnd<iture of P.Silva el al. (1996) have been adopted. The nature of lhe seaweed tlora of Inhacn island was assessc:d using the Ooristic ratio of Chelley (1977). viz.:

R .+ C ~ No. o(rhodoph)(k5pocj",--+.J~lJLDfl:hloroph}1l!.sp<cies P No. ofphaeophyte spec ies

\Vith this ca lcu lation. a value of3.0 ind icates co ld wah:r fl ora. whilst values of > 6.0 indicate a tropicaillora (Kapraun 1980, Mathieson & Pellniman I()S6)

Results Based on published records and unpublished collections, a list of marine algae for Inhaca Island was compiled totalling 205 records (see Appendix I ). T his total was made up of24 genera of Chlorophyta (64 records in tolal), 13 genera of Phaeophyta (23 records in total) and 73 genera of Rhodophyta (118 records in total). The most common orders are Cladophorales (including Siphonocladales, 10 records) Bryopsidales (42 records), Dictyo­tales (10 records), Corallinales (13 records), Gigartinales ( II records) and the Ceramiales (60 records).The floristic ratio of

Cheney (1977; R'C/ p ) gave a value of 7.91. N ineteen of the

records have been placed into synonymy (after Silva el al. 1996. marked 'syn. *, in Appendix I next to the most recent name applied locally) .

Discussion T he close link between seawater temperature and seaweed flora in southern Africa is well documented (Isaac 1937, 1938; Stephenson 1948; Macnae 1962; Brown & Jarman 1978; Bolton 1986; Bolton & Stegenga 1987, 1990; Farrell etal. 1993 , 1994). The 7 .91 floristic ratio for Inhaca Island is indicative ofa decid­ed ly tropical fl ora. A feature of the flora of the island is the large number of siphonous green algae, some of which also occur in KwaZulu-Natal, South Africa (Simons 1976; Seagrief 1980), Tanzania (Jaasund 1976), Madagascar and the Pacific Ocean islands (Pocock 1958 ; see also Farrell el al. 1994). The predomi­nance of these s iphonaceous green a lgae is probably a refl ection of the large, sandy intertidal areas avai lable to colonization on the east coast of southern Africa.

The tropical composition of the Inhaca seaweed flo ra may seem unusual initially , as the island is situated in the subtropics and is seasonally washed by a cooler counter current in winter, but the tropical influence is undoubtedly maintained by both the

427

mini-gyres of the Mozambique Current and by warming of shal· low waters in Maputo Bay on the west coast of the island (Macnae & Kalk 1962).

It is important to note that the absence of crustose coralline algae (Rhodophyceae) from th is li st. is due to lack of collecting (Dr Y.M. Chamberlain, pers. COI11I11.). This component of the algal flora of Inhaca Island requires further attention. Likewise, subt idal collections could be expected to yie ld a number of new records (see Anderson & Stegenga 1989). Indeed, additions to the flora are like ly to be most nu merous in the Division Rhodo· phyla, thereby increasing the value of the Cheney (1977) noristic index, and further emphasising the tropical nature of the algal assemblage.

Acknowledgements The authors would like to acknowledge financial assistance from the Foundation for Research Development a nd the Univers ity of the Witwatersrand research fund. We are appreciative of the can· structive criticisms of Professors P.c. Silva and M.l Wynne on an earlier draft of th is artic le. R.N . Pienaar and S. Sym are thanked for access to co llected material. We are most grateful to the referees for thei r constructive cr itic ism of this manuscript and for bringing to our attention the occurrence of LeplophylulJI ferox on Inhaca Island. NOTE; Regrettably Margaret Kalk passed away in August 1996; she is missed but leaves behind a tremen· dous contribution to aquatic biology in the form of her publications.

References AINGWORTH. J. 1996. An investigation ofthr.: clTect of harvesting on

the biomass and ilgar yieid Irom Gchdilillt ahbofliol'ulI1 from Reunion Rocks, KwaZulu·Natal. South Ati·ica. MSc Thesis. University of the Witwatersrand, SOlllh Africa.

ANDERSON, RJ . & STEGENGA. H. 1989. S" htidal algal communi­ties at Bird Ish:md. Eastem Cape. South Africa. 801. Mal'. 32: 299-3 11.

BAUER, H.A. 1933 . A world map oft icles. Geogr. Rev. 23: 259. BOLTON , 1.1. 1986. Marine phytogeography of the Benguela up \vclJ·

ing reg ion and the west coast of southern Africa: a tempera· ture-dependent approach. Bal. Mal'. 29: 251 - 256.

BOLTON, J.J. & STEGENGA . H. 1987. The marine algae ofHluleka (Transkei) and the warm tt!mpcratt!/stlbtropical transition on the east coast of southern Africa. Helgo. Meeres. 41: 165- 183.

BOLTON, JJ. & STEGENGA. H. 1990. The seaweeds of Dc Hoop nature reserve and their phytogeographical significance. S. Afr. J Bo/. 56: 233-238.

BOLTON . .I.J .• STEGENGA. H. & ANDERSON, RJ. 1991. The sea­weeds of False Bay. TI'{IIIS Roy. Soc. S. A/r. 47 : 605-610.

BROWN, A.C. & JARMAN. N. 1978. Coastal marine habitats. Monogr. bi%gio 3 1: 1239-1277.

CHAMBERLAI N. Y.M . 1958. DaJ:,'c/adus ramosus, a new species from Inhaca Island and Peninsula. Portuguese East Africa. J S. Afr. BOI. 24: 119- 121.

CHAMBERLAIN, Y.M. & KEATS. D.W. 1994. lllfee melobesioid crustose coralline red algae from South Africa: Leptophyrulll acerva· tllm (Fosl ic) comb. Nov .. L. joveatllJlI sp. nov. and L.lero.'!: (Foslie) comb. nov. Phyc%gia 33: 111 - 133.

CHENEY, D.P. 1977. R & e/P ~ D new and improved ratio for compar· ing seaweed Horas. J Phycol. IJ (supp l. ): 12.

CRITCHLEY, A.T., fARRELL. E.G., AKEN. M.E. & PIENAAR, R.N. 1994. A multivariate approilch 10 the phycogeograph ica l aspects of the seaweed nora of Inllaca Ishmd. Mo:wmbique. BOl. Mar. 37: 261-266. Proc. Vth Int. Seaweed Biogeog. Workshop.

DAY, J.H. 1974. Ecology of Morrumbene Estuary. Mozambique. TrailS.

Roya/ Soc. S. Aji-. 41: 43- 97. DE FREITAS. A.1. 1984. Penaoidea of soulh eastern Africa. I. Study

area and key to the south·eastem species. fnvesl. Rep. Oceanogr. Res

428

Inst. Durban 56: 1-31. PARRELL, E., CRITCHLEY, A.T. & AKEN. M.E. 1993. The intertidal

SCOlwccd flora of ls i pin go Beach. Natal. South Africa and its phycoge­ugraph ic a llinilics. Helgo/ander Meeresuntersuchungen 47: 145- 160.

FARRELL. E.G .. CRITCHLEY. A.T .. AKEN. M.E & PIENAAR. R.N. 1994. Tilt! biogeographical atlinities of the seaweed nora of Natal, South Africa as typified by ls ipingo Beach: a mu ltivariate approach. Bor. mar. 37: 277-2}!5. Yilt International Seaweed Biogeography Workshop, University of Cape Town, South Atrica. July 1993.

GILLESPIE, R.D .. AINGWORTH. J. & CRITCHLEY, A.T. 1997. The seaweed resources of KwaZulu-Natal, South Atrica: The Cl lITl!nt stale o/'our knowll.!dge. In: Current Trends in Marine Botanical Research in the E,lst African Region , cds. M. Bjork, A. K. Semesi. M. Pedersen and B. Bergman. pp. 186- 193. SlDA, Sweden.

HUISMAN . .I .M. & BOROWITSKA. M.A. 1990. A revis ionnfthc Ans­trnlian species of Ga/a:wura (Rhodophyta, Galaxauraceae). with a description of Tricleocarpa gen. nov. Ph.vc%gia 29: 150-172.

ISAAC. W.E. 1937. Soulh African coasla l wate rs in relat ion 10 ocean currents. Gt!ogr. Rev. 27: 65 1--664.

ISAAC. W.E. 1938. The geograph ical distribUlion of seaweed vegeta­tion in relation 10 temperatu re and otller facets. with special reference to South Afri ca. Comptes Rendues du Congl'es International de Geog­

raphie, Amsterdam. Vol. 2. sect. 7: 12-28. ISAAC, W.E. 1956. Marine algae of Inhaca Island and of the Inhaca

Peninsula . I. J. S. Afr. Bot. 22: 161 - 193. ISAAC, W.E. 1957. Some marine algae from Xai Xai. J. S. Afr. BDl. 23:

75- 102 . ISAAC. W.E. 1958. Ecology of algae. In : A Natural History of Inhaea

Is land. Mozambique. eds, W. Maenae, and M. Kalk, pp. 18- 22. Uni­versity of the Wit\vatcrsrand. Press, Johannesburg. Sou tb Africa.

ISAAC, W.E. 1959. Comments on the seaweed 110ra and vegetat ion of Inhaea. S. A fro J. Sci. 55: 181 - 183.

ISAAC, W.E. & CHAMBERLA IN, Y.M. 1958. Marine algae <If Inh.ca Island and of the Inhaca Peninsula. II. J. S. Afr. BOI. 24: 123- 158.

JAASUND. E. 1976. Intertidal Seaweeds in Tanzania. pp. 160. Pub­li shed by E. Jaasund, University of Tromso, Norway.

JACKELMAN. J.J .. STEGENGA, H.S. & BOLTON. J.J . 1991. The marine benthic nora of Cape Hangklip area and its phytogeogmphic aftin it ies. S, Afr. J. Bot. 57: 295-304.

KALK. M. 1954. Marine biological research atlnhaca Island, Mozam­bique: An interim report. S Afr. J Sci. 5 1: 107-11 5.

KALK. M. 1959. A general ecological survey of some shores in northern Mozambique. Revue Biologie Lisbon 2: 1-23.

KALK. M. 1995. A natural history oflnhaca Island. Witwatersrand Uni­versity Press.

KAPRAUN, D.F. 1980. Flori stic affinities of North Carolina inshore benthic marine algae. Phycologia 19: 245- 252.

KIN G. R.1 . & PllTTOCK. C.F. 1989. Morphology and taxonomy of Bostrychia and Sficlosiphorlia (RhodomeJaceae/Rhodophytu). Auslr. S:VSI. BOI. 2: 1- 73.

KYUN, H. 1938. VerzeiciUl is ei niger Rhodophycecn von SUdafrika. l.lmds Univ. Arsskr. (Awl. 2) 34: 1- 26.

LAM BERT. G .. STEINKE. T.D. & NAI DOO, Y. 1987. Algae associ­ated wi th mangroves in southern African estuaries. I. Rhodophyceae. S. Afr. J. 801. 53: 349-36 1.

LAWSON, G.W. & JOHN, D.M. 1982. The Marine Algae and Coastal Environment of Tropical West Africa. Kramer, Vaduz. 455p.

LEVRTNG. T . 1938. Verzeichnis einiger Chlorophyceen und Phaeophy­cecn von Sudafrika. LlInd.l· Ulliv. Arsskr. NF. (Adv. 2) 34: 1-25.

MACNAE, W. 1902. The fauna and flora of the eastern coasts of south­ern Africa in relati on to ocean currents. S. Afr. J. Sci. 58: 208-2 12.

MACNAE. W. & KALK, M. 1958. A Natural History of Inhaca Island. Mozambique. pp. 163. University of the Witwatersrand Press. Johan­nesburg. Soutb Africa.

MACNAE, W. & KALK, M. 1962. The fauna and flora of the sand Oats at Inhaca Island. Moumhique.J. An. Ecol. 31: 93- 128.

MATHIESON. A.c' & PENNIMAN, c'A . 1986. A phytogeographic interpretation of the marine Ilora from the Isles ofShoais, U.S.A. Bot. Mar. 29: 413-434.

S. Afr. J. Bot. 1997. 63(6)

NORRIS, R.E. 1986. Stuuies (111 ('I"ol/(/Ilia fransciscii (Ccramiact!ae. Rhodophyta) from South Africa and C. lVillue sp. Nov. Irom New Zealand. Phyc%gia 25: 133- 14:\.

NO RRIS, R.E. 1987a. Species o f AlltillitllllllfOil (R hodophyce:u:. Cera­m iaeeae) occurring on the sout heast Afri\:an \:oast (Natal). J f'hyco!. 23: 18-36.

NORRIS. R.E. I YX7h. P/l'I"odadw (Gdidlilceae. Rhodophyceae) a genus previously unknown III South A/rica. as it occurs in Natal. S

Afr. J Bot. 53: 3Y-43. NORRIS. R.E. 1987c. The systematic position of Gt!lul/opsis and ('cm­

lodic/yon (G igartinales, Rhodophye~;le). genera new 10 South Africa. S. Afr. J Bot. 53: 239-246.

NORRIS, R.E. & AKEN. M.E. 1985. Marille benthic algac ncw to Suuth AtTica. S. Afr. 1. Bal. 5 1: 55--65.

NORRIS. R. E., HOMMERSAND. M.II. & FREDERICQ, S. 1987. Gelidillln pteridijo!ium (Rhudophyccae), a lIew species from Natal and the t!ustem Cape. S Aj;' J Bo/. 53: 375-3RO.

PAPENFUSS. G. F. 1947. Ncw Illarillt' alga\! from SOllth A fr ica: I. L'llir.

Calif Publ. 801.23: 1- 16. PAPENFUSS. G.F .. MS HI GEN I. K.E. & CHIANG. V.-M. 1982. Re,i ­

sian o f the red alg<l l gt! lI us G%.murt/ wjth special rctcrcn\:c ( 0 the species occurring ill the Weskrn Indi.1Il Oc\!an. BOI. Mar. 25: 401-444.

POCOCK. M.A. 195K. Preliminary list or marinc alga\! colkcted at inhaca and on the neighbouring main land . In: A Natural History of rnhaca Island Mozambiqut!. eds. W. Mal.'nae & M. Kalk. pp 23-27. University of the Witwatersrand Prcss. Jllhannesburg. South Africa.

POST, E. 1957. Weitert! Datcn :Lur Verbrcitllng des Bos trych idum. VI. Archive Protislenk 102: 84-112.

SAENGER, P. 1971. On the occurrence or Ophic/oc/adlls (Rhll­dome1aeeae) in sOllthem Africll . .1. s. :I/i·. /Jot . 34: 29 1-304.

SAENGER. P. 1973. Additions and cotllnwnts on the Rhlldoillclacc<lc of Iuhaca Island. Mozambique. /I.'OV(I f/e(/ll'Igi(l2-l: 19-37.

SEAGRIEF, S,c. 1980. Seaweeds of Maputa [ ~ l\d. In: Studi(:s Oil tht! Ecology of Maputaland. cds. M.N. Bru ton and K.H. Cooper. pp 1841. Rhodes Un iversi ty and the Nata l Branch til' the Wild liti: Society o f southern Africa.

SEAGRlEF, S.C. 1984. A cata logue ofSolllh Alr ican green. brown and red marine algae. Mem. 80t. Surv. S. ,!rl'. 47 : \-72.

SEAGRI EF. S.c. 1988. Marine alg .. e. In: A field Gu ide to the Eastcn) Cape, eds. R.A. Lubke, F. W. Gess and M. N. Bruton, pp . 35-72. Gra­hamstown Centre of the Wildlife Society ofs()uthall Africa.

SILVA, P.c. 1959. Tht! genus Codium (Chlorophyta) in South Africa. J S. Aji-ican Botany 25: 103- 165.

SILVA, P.c' 1959. MENEZ. E.G. & MOE. R.L. 1987. Catalog of the benthic marine algae o f the Philippines. SlIIithsonian CUlllrlb ,\far.

Sci. 27: 1- 179. SILVA, P.c., BASSON. P.W. & MOE. R.L. 1996. Catalogue of tht!

Benthic Marine Algat! of the indi,lIl Ocean. Uni\'~rsily of Califomia Publications in ilotany. 1259p.

SILVA, S.M.F. 1991a. CY'lllophyceal.! t1ss(lciatcd with mangrove trees at Inhaca Island. Mozambique. Hothalw 21: 143- [ 50.

SILVA. S.M.f . 1991b. Flora de cianoliceas marinhas bentonit:as de IIlta da Inhaca. Iiloral sui de Mo~ambiqlle. I. /ioe/mea 18: 107- 125.

SILVA, S.M.F. 1991c. Cimwficeas marinas bentonicas da II ha dns POI"­ll1gueses, Mo~ambiqtle . Hochnt!a 18: 99- 113.

SILVA. S.M.F. & CUAM BA. N.J .B. 1991. COlltribui~ao .\(1 conheci­mento das cianoficeas Ii lull1entos:ls do plalH:ton marinho da Hha da In.haca. Mo~ambiql1e. Hoc/mca 18: 127-1 42.

SIMONS. R.H. 1966. The gcnus CC/"(JlI1iUIII in South Afrit:a. !Jotha/ia I):

\53-168. SIMONS, R.H. 1976. Scawceds of southern 1\ thca. GuiJcJines I{)r their

study and identifi cation. Fish. Bull. S. ~~rl'. 7: 1- 113 STEPHENSON. T.A. 194 8. The constitut ion of the intcrt idal fauna (lnd

flora of Sou tit Afr ica. Part II. Ann Natal Allis. 10: 26 1- 358. STEPHENSON, T.A. & Stephenson. A. 1972. Life Between Tide Marks

on Rocky Shores. pp . 420. Freeman. TAYLOR, W.R. 1967. Spec ies of Cau/e'1Ja (Ch lorophyceae) collected

on the Intemationallndian Ocean Expedi tion. Blumea 15: 45-53.

S. Mr. J. Bot. 1997.63(6) 429

African macroalgac. Mlcrobios 88: 115- 123. WYNNE. M..f . & G,T. KRAFT. 1981. Classi li calion Summary. In: The l3iology of Seaweeds. C.S. Lobban and MJ. WYOJle. BOl, Monogr. 17: 743- 750. Blnckwd l Scientilic Publ ications.

Vl.ACHOS. V .. CRITCHLEY. A.T. & VON HOLY. A. 1996. Es tab­hshmcnt of <l proto!';ol I<)f testing antimicrobial activity in southern

WOLLASTON, E.M. 1984. Species of Ceramiaceae (Rhodophyta) recorded from the Inlt.: rnalional lndian Ocean Exped iti on, 1962. Phyc­alogia 23: 28 1- 299.

Appendix 1 Revised list of seaweeds from Inhaca Island. Mozambique

Chlorophyceae

Ulvales

Cladophoraies

Bryopsidalcs

MOlloslromataceae

lJl vaccae

Anadyomenaceae

Cladophornceae

Siphonocladaceae

Bryopsidaceae

Caulerpaceae

DIVISION CHLOROPHYTA

Monostroma Thurel sp .

Enteromorpha compressa (L.) Nees

E. cf. prolifera (O.F.MueJler) J. Agardh

£. muscoides (Clemente y Rubio) Cremades (syn.*E. ramu/usa (lE. Smith) Carmichae l in W.Hooker

Gayra/ia oxysperma (Kuetzing) Vingradova ex Sc..1.gel el a/. (syn ... U/mria o:tysperma (Kuelzing) Gliding)

U/va uncinalis (Kuelzing) Montagne (5yn .* u.capensis An:schoug)

U. ngida C. Agardh

Anadyomene wrighlii Harvey ex J.Gray

Microdiclyon kraussii J.Gray

Chaelomorpha anlennina (Bory de Saint-Vincent) Kuetzing

C. crassa (c. Agardh) Kuelzing

C. cf.linum (O.F.Mueller) Kuelzing

Cladophoraprolijera (Roth) KuelZing

Boodlea composita (Harvey) Brand

Bood/eopsis pusilla (Collins) W.R.Taylor. Joly & Bcmatowicz

Struvea anastomosans (Harvey) Piccone ct Grunow ex Piccone

Va/oniopsis pachynema (G. Martens) Boergesen

Bryopsis Lamouroux sp.

Cau/erpa ambigua Okamura

C. antoensis Yamada

C. cupressoides (Vahl) C. Agardh var. lycopodium (1. Agardh) Weber-van Bosse fo rma amicorum (Harvey) Weber-van Bosse

C. elongara Weber- van Bosse

c.jergusonii G. Murray

C.filijormis (Suhr) Hering

C. lanuginosa J. Agardh

C. /enrillijera 1. Agardh

C. mexicana Sander ex Kuelzing

430 s. Afr. 1. Bot. 1997, 63(6)

Appendix 1 Continued

Codiaceae

Halimediaceae

llseudocodiaceae

Udoteaceae

Dasycladalcs Oa.<;ycladaceae

P~)lyphysaceae

C pellOIO Lumouroux

C. racemosa (Forsska l) J. Agardh var. clal'ifora (Turner) Webt!r-van Bosse var. laell virens (Montagne) Weber-van Bosse v<lr. l1U1crophysa (Sonder ex Kuclzing) W.R.Taylor vnr. racemosa vur. turbinara (J . Agardh) Eubank

C'. scalpellIjol"/llIs (R.Brown ex Turner) C. Aganlh var. denticulata (Decaisne) Weber-van Bosse var. inlel'meJia Weber-van Bosse var. scalp(!/liformis Papenfuss & Egerod

C'. se/ago (Turner) C. Agardh

C serrlliata (I\II~skal) J. Agardh

(' ,\wtulariodf!S (S. Gmclin) Howe

(' urviJIeana Montagne

C lVebhiulI(I Montagne var. pickeringii (Harvey & Bai ley) Eubank

C. ::eyheri Kuelzing

Codium aCUlIIinalUm a.Schmidt

C. capilotum P.Siiva

C. cicatrix r.silva

C duthieae P.Si iva

C. luc(/sii SClcbcll subsp. capense P .Silva

C. megalophysum P.Silva

C. mozembiquense P .Silva

C. platylobium Arcschoug

C. pocockiae P.Silva

C. prostratum Levring

C. sponglOsum Harvey

Halimeda cuneara Hering

Pseudocodium de-vries;i Weber-van Bosse

Avrainvillea Decaisne sp.

Chlorodesmis hildebrandtii A. Gepp & E. Gepp

Rhipidosiphonjavensis Montagne (syn.* Udoteajavensis (Muntagne ) A. G\!PP & E. Gcpp)

Udotea orientalis A. Gepp & E. Gepp

Dascyladus ramosus Y. Chamberlain

Neollleris dumetosa Lamouroux

N. val1-bossf:!att Howe

Acetabularia calyculus Lamouroux

A. major G. Mertens (syn.* A.moebii Sohns-Laubach)

S. Mr. J. Bot. 1997. 63(6)

Appendix 1 Continued

Ectocarpales Ectocarpaccae

Ralfsiaceac

Sphace!arialcs SphaceJar iaccae

Dictyulales Dict),Olaccac

SCYlosiphnnalcs Clmoosporaceae

Scylosiphonaceae

f-'ucaJes Cyloseiraceae

Sargassaccae

CLASS RHODOPHYCEAE

SUBCLASS BANGIOPHYC IDAE

l3angiales Bangiaceae

Porphyri diales Porphyridi aceae

SU[)CLASS FLORlDEOPHYCIDAE

Acrnchaetialcs Acrocnaet iaceae

NC lllaliales Galaxauracene

I<>t""" _,

DIVISION PHAEOPHYTA

Feldmamria irreguJal'is (Kuetzing) G. Hamel

Ralfsia expnnsa (J . Agardh) J. Agard h

Splmcelal' ia Lyngbyc sp.

Die/yopler;s dehcatula Lunouroux

D. longifoli(l Papenfuss (unpubl.)

D. serra/{/ (Arcschoug) Hoyt

Dietyora cervicornis Kuetzing (syn ... D. pardolis Kuetzing )

D. dichotom(l (Hudson) Lamouroux

I.obophora vOl'iegala (Lamouroux) Womersley ex Oliveira

Padina boryal/a Thivy

Srypopodium zonate (Lamouroux) Papenfuss

Zonaria subarticulato (Lamouroux) Papenfuss

Z. /Ournejol'tii (Lamouroux) Montagne

Chno()sporn minima (Hering) Papenfuss

Colpomenio sil/llOso (Mertens ex Roth) Derbes & Soli ~r

Hydroclathrus clathratlls (c. Agardh) Howe

Cystoseira myrica (S . Gmelin) C. Agardh

C. Irinadis (Forsskal) C. Agar&

Hormophysa cunei/armis (lGmelin) P.Silva

SargassulIl crassi/olium.1 . Agardh

S. II1clsi/olium (Turner) C. Agardh (syn.·s. hetel'opilyl/uIII (Turnt:r) C. Agardh)

S. myriocystllm l Agardh

Turbinoria ornato (Turner) C. Agardb

DIV ISION RHODOPHYTA

Bangia Lyngbye sp.

Slyfonema alsidii (Zanard in i) Drew

Ac:rachaetium Naegel i (syn. *Audouinella Bocy de Saini Vincent) sp.

431

432 S. Afr. l. Bot. 1997, 63(6)

Appendix 1 Continued

Liagoracl!ae

GelidiaJes Gdidiuceae

Gel idie llaceae

Graci Inriates Graci!ariacea~

Cryptoncmiaics HaiYlllen iaceae

Coral linall!s Coral I inaceae

Gigart inales Call iacanthaceae

ACl illolrichia ji-agifis (Forsskal) Boergesen

Galm(lura diesingulI1a Zanard ini

G. fJ/(/rginata (E ll is & Solander) Lamouroux

G obtusata (Ell is & Solander) Lamouroux

G. rugosa (Ellis & Solander) Lamouroux

Liagora ceralloides Lamouroux

L valida Hmvey (SYll.* Lfragilis Zanardini)

Gelidium pusilfum (Stackhouse) Le Jolls

G. replans (Suhr) Kyl in

Pterocladia cae.\pitosa (Kylin) R. Norris

Gelidiella aceroso (Forsskal) lreldman & G.Hamd

Graci/aria arCllata Zanardini

C. canaliculata Sonder (syn .• C. crassa Harvey ex 1. Agardh)

G. miliardelii (Montagne) J. Agardh

G. protea J. Agardh

C. saficornia (c. Agardh ) Dawson

Carpopeltis maillardii (Montagne & Millardel) Chiang

CraleloupiajiJicina (Lrunouroux) C. Agardh

Amphiroa beauvoisii Lamouroux

A.jragifissima (Linnaeus) Lamormlx

A. rigida Lamouroux

Arthrocardia COrlnala (Kuetzing) Johansen

A.flabelhlla (Kuetzing) Manza

CheilospoMiIIl cullratum (Harvey) Areschoug

C. sagiltallim (Lamouroux) Areschoug

Choreonema Ihuretii (Bomet) Scmnitz

Haliplilon cubense (Montagne ex Kuelzing) Garbary & Johansen

H. roseulII (Lamarck) Garbary & Johansen (syn.*Corallina cavier; Lamouroux)

H. subliialum (E ll is & Solander) Johansen

Jania inlermedia (Kuetzing) P.S ilva

Leplophyrumjerox (Fostie) Chamberlain & Keats

Titanoderma cora/linae (P.Crouan & H.Crouan) Woelkerling. Chamb~r1aitl & P.Si lva (S)' I1 . * Dermo­talilhon corai/inae (P.Crouan & H.Crouan) Foslie in Boergesen)

COlenelJa coespilosa (Withering) L. Irvine

C. nipae Zanardini

C. subumhelJata Tseng

S. Afr. J. Bot. 1997.63(6)

Appendix 1 Continued

Gigartinaceae

II) pnt;:'H.:~ac

M yci1( ldcaccac

Phact::lucarpaccae

Plocamialcs PIOC3miaccae

Rhodymt!nialcs Champiaceac

Rhodymen iaccac

Cerami ales Ccram iaceac

Gigarfina Stackhouse sp.

H.l'PfiCO camilla (Ku.:tzing) 1. Agardh

H IIIllsciformis (Wu lren) Lamouroux

Ii. mdifica 1. Agardll

11. rose(J Papenfus$

H. spid/era (Suhr) Harvey

H. temtis KyJin

H. virIdis Papenfuss

Ml'choc/ea J.llooker & Harvey sp.

Plmcelocarpus cf. camp/anatus Harvey

p, Iris/iehus J. Agardh

Plocamium becken SchmilZ ex Simons

P. coralforhiza (Turner) Harvey

P. glomera/um J. Agardh

1'. ma:tiJlosum (Poirel) Lamouroux

P. slIhrii Kuetzing

P. te/filiriae (W.Hookcr & Harvey) Harvey ex Kuetzing

Champia compressa Harvey

Ch.l'locladia Greville sp.

Botlyoc/adia madagascariensis G.Feldmann

Geliciiopsis .... ariabilis (J. Agardh) Schmitz (syn. *CeralOdic(wm vlIriabile (Greville ex J. Agardh) R.Norris)

Rhodymenia nafalensis Kylin

Anolrichium secundum (Harvey ex J.Agar&) Funari (syn.*CrijJithsill s(fcuncia J. Agardh)

Anfithamnion Iherminieri (P.Crouan & H.Crouan) Barnet ex Nasr (syn. * A antilkmum Boergescn)

Callirhanmion Lyngbye sp.

CenJroceras c/avulatum (c. Agardh) Montagne

Ceramium diaphanum (Lightfoot) Roth

C. planum Kuetzing

('rouonia aUel/liOla (c. Agardh) 1. Agardh

Gordonielfa YOllakllniensis (Yamada & T.Tanaka) Itono (syn .'Spf.'rmothaml1lon yonakuniensis Yamada et Tanaka)

Griffithsia conjervoldes Suhr

G. secunda 1. Agardh

? Mazoyerella Gordon Mills & Womersley sp.

433

434 S. Afr. 1. Bot. 1997,63(6)

Appendix 1 Continued

Dasyaceae

Delt:ssel'iaccae

Rhodomdaceae

Pieofluspo/,mm caribaeum (Boergesen) R.Norris (syn. * Mesrl(I/(l/IlIJlOf/ carihbacm Bocrgesc::n)

P. '? harveyallum (J . Agardh) De Toni

PII/otlUlI1l11ion polysporum Gordon~Mills & Womcrsll~)

Spyridia cupressilla Kuetzing

S ji/amentosa (Wlilfen) Harvey

S. hypnoides ((-3ory tie Saint Vincent) Papenfuss

Tiffrmlella cymodoceae (Baergesen) Gordon

Das)'a scoparia Harvey

D. hailiuuviana {S.Gmelin} Monlagne

Neterosiphonia capensls Falkenberg

Acrosorium macu/arum (Sonder ex Kuelzing) Papenfuss

Caiog/oss{J leprieurii (Montagne) a .Martens

Martensia elegans Hering

Platysiphonia delicata (Clemente y Ruhio) Cremndes {syn. * P/a~rslphoflia lIIilliata (C Agartlh) Baergesen)

Taenioma nanum (Kuetzing) Papenfuss

Acanthophoro splcijera (vah l) Baergesen

Amansia rhodantha (Harvey) J. Agardh (syn.* A.g/omcrtl/{/ J. Agartlh )

BosJrychia moritziana (Sander ex KuelZing) J. Agardh

B. radicans (Montagne) Montagne

B. leI/ella (Lamoroux) 1. Agardh

Bryocladia densa Saenger

Chondria annalO (Kuetzing) Okamura

Digenia simple..'( (Wulfen) C. Agardh

Digeneopsis subopaca Simons

Herposiphonia secunda (C. Agardh) Ambronn

H. secunda (c. Agardh) Ambronn r. renelia (c. Agardh) Wynllc

Kuetzillgia natalensis J. Agardh

Laurencia coilimellaris Boergesen

L. camplanalO (Suhr) Kuclling

L. flexuosa Kuetzing

L. nalOfensis Kylin

L. oblllsa (Hudson) Lamauroux

L. pumi/a (Grunow) PapenFuss

L. tenera Tseng

LeveiJleajungermannioides (Martens & G. Hering) Hmwy

Murrayelia peric/ados (c. Agardh) Schmitz

Neurymeniajraxinifolia (Mertens ex Turner) J. Agardh

Ophidocfadus simpliciusculus (P.Crouan & H.Crouan) F;Jlkcnbcrg

Osmulldariaflmhriata (Lamouroux) R.Narris (syn . * l'idalia jimbriata ( Lamollmux) 1. Agardh)

S. Me. 1. Bot. I ~97. 63((,)

Appendix 1 Continued

P/acophora binderi (1. Agardh) J. Agardh

r()~l'siphonia cae:'pifoS(I (Pocock) Holl enberg (syn. * FalkenhergieJ/a caesplfosa Pocock)

P.illcompl(l ll llrvey

P sllbti/lssima Montagne

p()~l,=olJi(l e1egalls SlIhr

Pferosiplionia stangeri (J . Agardh) Falkenberg

Rhodomelopsis ajrican£l Pocock

StiCfosipilonia longolellsis (Post) King & Pultock

Streblocladia eDlymhi/era (c. Agardh) Kylin

435