Phytoplankton periodicity in a subtropical lake (Lake Kinneret, Israel)
Lake Kinneret is a subtropical monomictic lake characterized by a Pyrrhophyta-Chlorophyta assemblage, supplemented by Cyanophyta in some years. Concerning their abundance and seasonal occurrence, the phytoplanktonic algae belong to two groups: algae appearing in quantity at a definite annual period and algae present throughout the year. Four stages of algal succession occur in the lake. There is a marked periodicity in the phytoplankton composition with a high standing stock in winter-spring, due to the dinoflagellate water-bloom, and a low one during the summer months, related to the high stability of summer stratification. The annual succession at the species level has been an almost constant event in the lake for many years.
The increase in nutrient concentrations in 1973 and 1974 increased the diversity and abundance of algae (except Peridinium) but did not lead to significant changes in algal succession. Conversely, the decrease of the zooplankton grazing pressure in 1975 and 1976 facilitated the development of algal maxima during summer-fall. They were caused by nanoplanktonic forms, and they developmed without additional enrichment of nutrients. The algal abundance and diversity decreased. The years 1981 and 1982 were characterized by both an increase in phosphorous and a decrease in zooplankton. These conditions favord the concomitant abundance of many species and an increase of non-Pyrrhopyta biomass.
KeywordsSoluble Reactive Phosphorus Total Phytoplankton Biomass Summer Stratification Subtropical Lake Algal Diversity
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- Allanson, B. R., 1979. The physico-chemical limnology of Lake Sibaya. In B. R. Allanson (ed.), Lake Sibaya. Junk, The Hague. Monogr. biol. 36: 42–74. Berman, T. & U. Pollingher, 1974. Annual and seasonal variations of phytoplankton, chlorophyll and photosynthesis in Lake Kinneret. Limnol. Oceanogr. 19: 31–54. Carpelan, L. H., 1961. Physical and chemical characteristics. In B. V. Walker (ed.), The Ecology of the Salton Sea, California, in Relation to the Sport Fishery. Fish Bull. 113. Calif. Dep. Fish Game: 17–32. Gophen, M., 1981. Metabolic activity of herbivorous zooplankton in Lake Kinneret (Israel) during 1972–1977. J. Plankton Res. 3: 15–24.Google Scholar
- Gophen, M., 1984. The impact of zooplankton status on the management of Lake Kinneret (Israel). Int. Symp. trop. Zooplankton, Sao Carlos, Brazil, 1982. Hydrobiologia 113: 249–258.Google Scholar
- Gophen, M., 1985. Effect of fish predation on size class distribution of Cladocerans in Lake Kinneret. Verh. int. Ver. Limnol. 22: 3104–3108. Lewis, W. M. Jr., 1974. Primary productivity in the plankton community of a tropical lake. Ecol. Monogr. 44: 377–409. Margalef, R., 1958. Temporal succession and spatial heterogeneity in phytoplankton. In A. A. Buzzati-Traverso (ed.), Perspectives in Marine Biology. University of California Press, Berkeley: 323–350. Pollingher, U., 1981. The structure and dynamics of the phytoplankton assemblages in Lake Kinneret, Israel. J. Plankton Res. 3: 93–105.Google Scholar
- Pollingher, U. & T. Berman, 1975. Temporal and spatial patterns of dinoflagellate blooms in Lake Kinneret, Israel (1969–1974). Verh. int. Ver. Limnol. 19: 1370–1382.Google Scholar
- Pollingher, U. & C. Serruya, 1976. Phased division of Peridinium cinctum fawestii (Dinophyceae) and development of the Lake Kinneret (Israel) bloom. J. Phycol. 12: 162–170.Google Scholar
- Rubin, S., 1978. Precipitation. In C. Serruya (ed.), Lake Kinneret. Junk, The Hague. Monogr. biol. 32: 69 - 86.Google Scholar
- Serruya, C., 1975. Nitrogen and phosphorus balances and load-biomass relationship in Lake Kinneret (Israel). Verh. int. Ver. Limnol. 19: 1357 - 1369.Google Scholar
- Serruya, C. & T. Berman, 1975. Phosphorus, nitrogen and the growth of algae in Lake Kinneret. J. Phycol. 11: 155 - 162.Google Scholar
- Serruya, C. & U: Pollingher, 1983. Lakes of the warm belt. Cambridge University Press, Cambridge, 550 pp.Google Scholar
- Serruya, C., M. Edelstein, U. Pollingher & S. Serruya, 1974. Lake Kinneret sediments: nutrient composition of the pore water and mud water exchanges. Limnol. Oceanogr. 19: 489–508.Google Scholar
- Serruya, C., M. Gophen & U. Pollingher, 1980. Lake Kinneret: carbon flow patterns and ecosystem management. Arch. Hydrobiol. 88: 265–302.Google Scholar
- Serruya, C., U. Pollingher & M. Gophen, 1975. N and P distribution in Lake Kinneret (Israel) with emphasis on dissolved organic nitrogenn. Oikos 26: 1–8.Google Scholar
- Serruya, C., S. Serruya & U. Pollingher, 1978. Wind, phosphorus release and division rate of Peridinium in Lake Kinneret. Verh. int. Ver. Limnol. 20: 1096–1102.Google Scholar
- Serruya, S., 1975. Wind, water temperature and motions in Lake Kinneret: general pattern. Verh. int. Ver. Limnol. 19: 73–87.Google Scholar
- Serruya, S., 1978. Data concerning meteorological parameters measured on the lake or on the lake shores. In C. Serruya (ed.), Lake Kinneret. Junk, The Hague Monogr. biol. 32: 59–68.Google Scholar
- Utermöl, H., 1958. Zur Vervollkommnung der quantitativen Phytoplankton–methodic. Mitt. Int. Ver. Limnol. 9: 1–38.Google Scholar