Abstract
The density, standing stock, reproductive periodicity and alginate yields have been investigated for a mixed Sargassum species population at Reunion Rocks, KwaZulu-Natal, South Africa. The population consists of two dominant components, Sargassum elegans Suhr and a second species, here termed Sargassum sp. 1. Sargassum elegans typically makes up more than 70% of the population which is heterogeneous in both biomass and density distribution. These species share the same macro-scale distribution within the site and display the same periods of growth and senescence. Standing stock dropped in the cooler winter months and reached a maximum in the hot summer months. Biomass was correlated to one month antecedent minimum, maximum and mean air temperature. Density patterns followed a similar pattern and biomass increased with density. Alginate yield of both species peaked in the warm summer months and was lowest during the cooler winter months. Reproduction peaks were recorded in the cooler months after the peak in biomass and density.
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References
Aingworth, J., 1997. An investigation of the effect of harvesting on the biomass and agar yield from Gelidium abbottiorum from Reunion Rocks, KwaZulu-Natal, South Africa. MSc thesis. University of the Witwatersrand, South Africa, 125 pp.
Aingworth, J. & A. T. Critchley, 1997. Simulated harvest of Gelidium abbottiorum R. E. Norris at Reunion Rocks, KwaZulu Natal, South Africa. S. Afr. J. Bot. 63: 404–409.
Ang, P. O. Jr., 1984. Preliminary study on the alginate contents of Sargassum spp. in Balibago, Calatagan, Philippines. Hydrobiologia 116/117: 547–550.
Ang, P. O. & R. E. De Wreede, 1992. Density dependence in a population of Fucus distichus. Mar. Ecol. Prog. Ser. 90: 169–181.
Birkett, D. A., 1984. Seasonality and growth of Sargassum Agardh on the Natal coast with some taxonomic notes. M.Sc. thesis, University of Natal, Durban, 266 pp.
Creed, J. C., 1995. Spatial dynamics of a Himanthalia elongata (Fucales, Phaeophyta) population. J. Phycol. 31: 851–859.
Critchley, A. T., R. D. Gillespie & K. W. G. Rotmann, 1998. The seaweed resources of South Africa. In Ohno, M., A. T. Critchley, D. Largo & R. D. Gillespie (eds), Seaweed Resources of the World. JICA, Japan: 413–427.
Daly, E. L. & J. S. Prince, 1981. The ecology of Sargassum pteropleuron Grunow (Phaeophyceae, Fucales) in the waters off South Florida. III. Seasonal variation in alginic acid concentration. Phycologia 20: 352–357.
De Paula, E. J. & E. C. Oliviera, 1982. Wave exposure and ecotypical differentiation in Sargassum cymosum (Phaeophyta-Fucales). Phycologia 21: 145–153.
De Wreede, R. E., 1976. The phenology of three species of Sargassum (Sargassaceae, Phaeophyta) in Hawaii. Phycologia 15: 175–183.
De Wreede, R. E, 1978. Phenology of Sargassum muticum (Phaeophyta) in the Strait of Georgia, British Columbia. Syesis 11: 1–9.
Deysher, L., 1984. Reproductive phenology of newly introduced populations of the brown alga, Sargassum muticum (Yendo) Fensholt. Hydrobiologia 116/117: 403–407.
Doty, M. S., 1971. Antecedent event influence on benthic marine algal standing crops in Hawaii. J. exp. mar. Biol. Ecol. 6: 161–166.
Eyre, J. & T. A. Stephenson, 1938. The South African intertidal zone and its relation to ocean currents. V. A subtropical Indian Ocean shore. Ann. Natal Mus. 9: 21–46.
Ganzon-Fortes, E. T., R. R. Campos & J. Udarbe, 1993. The use of Philippine seaweeds in agriculture. Appl. Phycol. Forum, 10: 6–7.
Gillespie, R. D. & A. T. Critchley, 1997. Morphometric studies of Sargassum spp. from Reunion Rocks, KwaZulu-Natal, South Africa. I. Receptacle studies. S. afr. J. Bot. 63: 356–362.
Gillespie, R. D. & A. T. Critchley, 1998. Morphometric studies of three Sargassum species (Sargassaceae, Phaeophyta) from KwaZulu-Natal, South Africa. II. Thallus morphology and variability. Submitted for publication.
Gillespie, R. D., J. Aingworth & A. T. Critchley, 1996. The Seaweed resources of KwaZulu-Natal, South Africa: The current state of our knowledge. In Björk, M., A. K. Semesi, M. Pedersén & B. Bergman (eds), Current Trends in Marine Botanical Research. SIDA, Sweden: 186–193.
Glenn, E. P., C. M. Smith & M. S. Doty, 1990. Influence of antecedent water temperatures on standing crop of Sargassum spp.-dominated reef flat in Hawaii. Mar. Biol. 105: 323–328.
Hopkins, B., 1957. Pattern in the plant community. J. Ecol. 45: 451–463.
Hruby, T. & T. A. Norton, 1979. Algal colonization on rocky shores in the Firth of Clyde. J. Ecol. 67: 65–77.
Kendrick, G. A., 1993. Sargassum beds at Rottnest Island: species composition and abundance. In Wells, F. E., D. I. Walker, H. Kirkman. & R. Lethbridge (eds), Proceedings of the Fifth International Marine Biological Workshop: The Marine Flora and Fauna of Rottnest Island, Western Australia. Western Australian Museum, Perth: 455–472.
Kendrick, G. A. & D. I. Walker, 1994. Role of recruitment in structuring beds of Sargassum spp. (Phaeophyta) at Rottnest Island, Western Australia. J. Phycol. 30: 200–208.
Koh, C.-H., Y. Kim & S.-G. Kang, 1993. Size distribution, growth and production of Sargassum thunbergii in an intertidal zone of Padori, west coast of Korea. Hydrobiologia 260/261: 207–214.
Krige, L. J., 1932. Peculiar little rock basins at Isipingo Beach, Natal. S. Afr. J. Sci. XXIX: 262–264.
Largo, D. B., M. Ohno & A. T. Critchley, 1994. Seasonal changes in the growth and reproduction of Sargassum polycystum C. Ag. and Sargassum siliquosum J. Ag. (Sargassaceae, Fucales) from Liloan, Cebu, in Central Philippines. Jap. J. Phycol. 42: 53–61.
Lubchenco, J., 1983. Littorina and Fucus: effects of herbivores, substratum heterogeneity, and plant escapes during succession. Ecology 64: 1116–11123.
Masuda, M., T. Ajisaka, S. Kawaguchi, H. Quang Nang & Huu Dinh Nguyen, 1993. The use of Sargassum mcclurei as medical tea in Vietnam. Jap. J. Phycol. 41: 39–42.
McCandless, E. L, 1981. Polysaccharides of the seaweeds. In Lob-ban, C. S. & M. J. Wynne (eds), The Biology of Seaweeds. Blackwell Scientific Publications, Oxford: 559–588.
McCourt, R. M., 1984a. Seasonal patterns of abundance, distributions, and phenology in relation to growth strategies of three Sargassum species. J. exp. mar. Biol. Ecol. 74: 141–156.
McCourt, R. M., 1984b. Niche differentiation between sympatric Sargassum species in the northern Gulf of California. Mar. Ecol. Prog. Ser. 18: 139–148.
McCourt, R. M., 1985. Reproductive biomass allocation in three Sargassum species. Oecologia 67: 113–117.
Schiel, D. R. & J. H. Choat, 1980. Effects of density on monospecific stands of marine algae. Nature 285: 324–326.
Scrosati, R., 1996. The relationship between stand biomass and frond density in the clonal alga Mazaella cornucopiae. Hydrobiologia 326/327: 259–265.
Trono, G. C. Jr. & A. O. Lluisma, 1990. Seasonality of standing crop of a Sargassum (Fucales, Phaeophyta) bed in Bolinao, Pangasinan, Philippines. Hydrobiologia 204/205: 331–338.
Trono, G. C. Jr. & G. L. Tolentino, 1993. Studies on the management of Sargassum (Fucales, Phaeophyta) bed in Bolinao, Pangasinan, Philippines. Korean J. Phycol. 8: 249–257.
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Gillespie, R.D., Critchley, A.T. (1999). Phenology of Sargassum spp. (Sargassaceae, Phaeophyta) from Reunion Rocks, KwaZulu-Natal, South Africa. In: Kain, J.M., Brown, M.T., Lahaye, M. (eds) Sixteenth International Seaweed Symposium. Developments in Hydrobiology, vol 137. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4449-0_23
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DOI: https://doi.org/10.1007/978-94-011-4449-0_23
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