Spatial distribution of phytoplankton and picocyanobacteria in Lake Tanganyika in March and April 1998
Keywords:
Species Composition, Water Column MixingAbstract
The spatial distribution of phytoplankton and picocyanobacteria was studied in Lake Tanganyika in relation to environmental factors. Sampling was conducted within three weeks during the wet season of 1998 when the water column stratification was most stable. The secchi depth varied between 11 and 16 m, except off the river Malagarasi (3 m). The depth of the euphotic zone was 33 to 56 m. Altogether, 218 phytoplankton taxa were identified. Their total biomass varied between 13 and 88 mg m−3 fresh weight. Picocyanobacteria were present at very high densities (104 to 6 × 10 5 cells ml−1). The influence of the river Malagarasi appeared to spread along the water surface because of the lower density of the river water. The phytoplankton species number and biomass were particularly high near the river mouth. Excluding that area, there were no statistically significant differences in the species composition among study sites. Nevertheless, differences in water column mixing, indicated by variable temperature gradients, seemed to affect the horizontal distribution of at least some phytoplankton species.
References
Beisner, B. E. 2001. Plankton community structure in fluctuating environments and the role of productivity. OIKOS, 95: 496–510.
Bell, T. and Kalff, J. 2001. The contribution of picophytoplankton in marine and freshwater systems of different trophic status and depth. Limnol. Oceanogr., 46: 1243–1248.
Bergman, B., Gallon, J. R., Rai, A. N. and Stal, L. J. 1997. N2 fixation by non heterocystous cyanobacteria. FEMS Microbiol. Rev., 19: 139–185.
Caljon, A. and Cocquyt, C. 1992. Diatoms from surface sediments of the northern part of Lake Tanganyika. Hydrobiologia, 230: 135–156.
Callieri, C. and Stockner, J. 2000. Picocyanobacteria success in oligotrophic lakes: fact of fiction?. J. Limnol., 59: 72–76.
Castenholz, R. W. and Garcia-Pichel, E. 2000. “Cyanobacterial responses to UV-radiation.”. In The Ecology of Cyanobacteria, Edited by: Whitton, B. A. and Potts, M. 591–632. The Netherlands: Kluwer Academic Publishers.
Cocquyt, C., Caljon, A. and Vyverman, W. 1991. Seasonal and spatial aspects of phytoplankton along the north-eastern coast of Lake Tanganyika. Ann. Limnol., 27: 215–225.
Cocquyt, C. and Vyverman, W. 1994. Composition and diversity of the algal flora in the East African great lakes: a comparative survey of lakes Tanganyika, Malawi (Nyasa), and Victoria. Arch. Hydrobiol. Beih. Ergebn. Limnol., 44: 161–172.
Coulter, G. W., ed. 1991. Lake Tanganyika and its Life. British Museum (Natural History), Oxford, , UK: Oxford University Press.
Gallon, J. R. 2001. N2 fixation in phototrophs: adaptation to a specialized way of life. Plant and Cell, 230: 39–48.
Glover, H. E., Keller, M. D. and Spinrad, R. W. 1987. The effects of light quality and intensity on photosynthesis and growth of marine planktonicprokaryotic clones. J. Exp. Mar. Biol. Ecol., 105: 137–159.
Haberyan, K. A. and Hecky, R. E. 1987. The late Pleistocene and Holocene stratigraphy and paleolimnology of lakes Kivu and Tanganyika. Palaeogeography, Palaeolimnology, Palaeoecology, 61: 169–197.
Hecky, R. E. and Bugenyi, F. W. B. 1992. II. Water quality. Hydrology and chemistry of the African Great Lakes and water quality issues: problems and solutions. Mitt. Internat. Verein. Limnol., 23: 45–54.
Hecky, R. E. and Fee, E. J. 1981. Primary production and rates of algal growth in Lake Tanganyika. Limnol. Oceanogr., 26: 532–547.
Hecky, R. E. and Kling, H. J. 1981. The phytoplankton and protozooplankton of the euphoric zone of Lake Tanganyika: species composition, biomass, chlorophyll content, and spatio-temporal distribution. Limnol. Oceanogr., 26: 548–564.
Hecky, R. E. and Kling, H. J. 1987. Phytoplankton ecology of the great lakes in the rift valleys of Central Africa. Arch. Hydrobiol. Beih. Ergebn. Limnol., 25: 197–228.
Hecky, R. E., Campbell, P. and Hendzel, L. L. 1993. The stoichiometry of carbon, nitrogen, and phosphorus in particulate matter of lakes and oceans. Limnol. Oceanogr., 38: 709–724.
Huttula, T., ed. 1997. Flow, thermal regime and sediment transport studies in Lake Tanganyika. Kuopio University Publications, C. Natural and Environmental Sciences 73 Kuopio, , Finland: Kuopio University Printing Office.
Jongman, R. H. G., ter Braak, C. J. F. and van Tongeren, O. F. R., eds. 1995. Data Analysis in Community and Landscape Ecology, Cambridge: University Press.
Jarvinen, M., Salonen, K., Sarvala, J., Vuorio, K. and Virtanen, A. 1999. The stoichiometry of particulate nutrients in the Lake Tanganyika-implications for nutrient limitation of phytoplankton. Hydrobiologia, 407: 81–88.
Komarek, J. and Novelo, E. 1994. Little known tropical Chroococcus species (Cyanoprokaryotes). Preslia, Praha, 66: 1–21.
Langenberg, V T, Mwape, L. M., Tshibangu, K., Tumba, J.-M., Koelmans, A. A., Roijackers, R., Salonen, K., Sarvala, J. and Mölsä, H. 2002. Comparison of thermal stratification, light attenuation and chlorophyll-a dynamics between the ends of Lake Tanganyika. Aquat. Ecosyst. Health Manage., 5(3): 255–265.
Langenberg, V. T., Nyamushuhu, S., Roijackers, R. and Koelmans, A. A. in press. Assessing external nutrient sources for Lake Tanganyika. J. Great Lakes Res,
Moutin, T., Thingstad, T. F., van Wambeke, F., Marie, D. and Claustre, H. 2002. Does competition for nonomolar phosphate supply explain the predominance of the cyanobacterium Synechococcusl Limnol. Oceanogr., 47: 1562–1567.
Podsetchine, V., Huttula, T. and Savijärvi, H. 1999. A three dimensional-circulation model of Lake Tanganyika. Hydrobiologia, 407: 25–35.
Salonen, K., Sarvala, J., Jarvinen, M., Langenberg, V., Nuottajärvi, M., Vuorio, K. and Chitamwebwa, D. B. R. 1999. Phytoplankton in Lake Tanganyika-vertical and horizontal distribution of in vivo fluorescence. Hydrobiologia, 407: 89–103.
Sarvala, J., Salonen, K., Jarvinen, M., Aro, E., Huttula, T., Kotilainen, P., Kurki, H., Langenberg, V., Mannini, P., Peltonen, A., Plisnier, P-D., Vuorinen, L., Mölsä, H. and Lindqvist, O. V. 1999. Trophic structure of Lake Tanganyika: carbon flows in the pelagic food web. Hydrobiologia, 407: 149–173.
Stockner, J. G. 1991. Autotrophic picoplankton in freshwater ecosystems: the view from the summit. Int. Rev. Ges. Hydrobiol., 76: 483–492.
ter Braak, C. J. F. and Smilauer, P. 1998. CANOCO reference manual and user's guide to Canoco for Windows. Software for canonical community ordination (version 4), Ithaca, NY, , USA: Microcomputer Power.
Utermohl, H. 1958. Zur Vervollkommung der quantitativen Phytoplanktonmethodik. Mitt. Int. Verein. Limnol., 9: 1–38.
Vandelannoote, A., Deelstra, H., Vyumvuhore, F., Bitetera, L. and Ollevier, F. 1997. “The impact of the river Ntahangwa, the most polluted Burundian tributary of Lake Tanganyika, on the water quality of the lake.”. In African Inland Fisheries, Aquaculture and the Environment, Edited by: Remane, K. Bodmin, , UK: Hartnolls Ltd.
Vörös, L., Callieri, C. V., Balogh, K. and Bertoni, R. 1998. Freshwater picocyanobacteria along a trophic gradient and light quality range. Hydrobiologia, 369/370: 117–125.
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