Dissolved oxygen and thermal regimes of a Ugandan crater lake
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This paper quantifies the temporal pattern of thermal stratification and deoxygenation in Lake Nkuruba, a small (3 ha), deep (maximum depth = 38 m) crater lake in western Uganda. Dissolved oxygen penetrated to an average depth of 9 m and a maximum depth of 15 m below which the lake was permanently anoxic over the 2 years of study. Although surface oxygen levels were correlated with both surface water temperature and rainfall, seasonal cycles of dissolved oxygen were not well-defined and may have been obscured by the high frequency of short-term fluctuations and by inter-annual variations caused by shifts in rainfall.
Surface water temperature averaged 23.3±0.7 °C (S.D.) and varied directly with air temperature. Both diurnal changes and top-bottom temperature differentials were small averaging 1.7±0.7 °C and 1.6±0.8 °C, respectively. Thermal stability ranged from 101.3 to 499.9 g-cm cm-2 and was positively related to surface water temperature suggesting that this small protected lake responds rapidly to short-term meteorological changes. Because contribution to the annual heat exchange cycle was confined to upper waters, the lake's annual heat budget was low, 1,073.8 cal cm-2 yr-1. However, net primary productivity was relatively high averaging 1.3 g C m-2d-1.
The region where Lake Nkuruba is situated experienced a very strong earthquake (6.2 on the Richter scale) on 4 February, 1994. Subsequently, water levels dropped markedly in the lake, falling 3.14 m over a 5-month period.
- Baxter, R.M., Prosser, M. V., Talling, J. F., Wood, R. B. (1965) Stratification in tropical African lakes at moderate altitudes (1,500 to 2,000 m). Limnol. Oceanogr. 10: pp. 510-520
- Beadle, L. C. (1963) Anaerobic life in a tropical crater lake. Nature 200: pp. 1223-1224 CrossRef
- Beadle, L. C. (1966) Prolonged stratification and deoxygenation in tropical lakes. I. Crater Lake Nkugute, Uganda, compared with Lakes Bunyoni and Edward. Limnol. Oceanogr. 11: pp. 152-163
- Beadle, L. C. (1981) The Inland Waters of Tropical Africa: An Introduction to Tropical Limnology. Longman, New York
- Belsley, D. A., Kuh, E., Welsch, R. E. (1980) Regression Diagnostics: Identifying Influential Data and Sources of Collinearity. John Wiley and Sons, New York
- Bowling, L. C. (1990) Heat contents, thermal stabilities and Birgean wind work in dystrophic Tasmanian lakes and reservoirs. Aust. J. mar. Freshwat. Res. 41: pp. 429-441 CrossRef
- Bowling, L. C., Salonen, K. (1990) Heat uptake and resistance to mixing in small humic forest lakes in southern Finland. Aust. J. mar. Freshwat. Res. 41: pp. 747-759 CrossRef
- Carter, G. S., Beadle, L. C. (1930) The fauna of the swamp of the Paraguayan Chaco in relation to its environment. I. Physicochemical nature of the environment. J. linn. Soc. 37: pp. 205-258 CrossRef
- Chapman, C. A., Chapman, L. J. (1997) Forest regeneration in logged and unlogged forests of Kibale National Park, Uganda. Biotropica 29: pp. 396-412 CrossRef
- Chapman, L. J., Chapman, C. A., Crisman, T.L. (1998) Limnological observations of a papyrus swamp in Uganda: implications for fish faunal structure and diversity. Verh. int. Ver. Limnol. 26: pp. 1821-1826
- Chapman, L. J., Kramer, D. L. (1991) Limnological observations of an intermittent tropical dry forest stream. Hydrobiologia 226: pp. 153-166
- Cole, G. A. (1983) Textbook of Limnology. The C. V. Mosby Company, St. Louis
- Hecky, R. E. (1971) The paleolimnology of the alkaline, saline lakes on the Mt. Meru lahar. Duke University, Durham, N.C.
- Hutchinson, G. E. (1957) A Treatise on Limnology. Geography, Physics, and Chemistry. John Wiley and Sons, Inc., New York
- Idso, S. B. (1973) On the concept of the lake stability. Limnol. Oceanogr. 18: pp. 681-683
- Kilham, P. (1971) Biogeochemistry of African lakes and rivers. Duke University, Durham, N.C.
- Kizito, Y. S., 1995. Studies of the zooplankton of two western Uganda crater lakes, Nkuruba and Nyahirya with special emphasis on the bionomics and productivity of the cyclopoids. Ph.D. dissertation. Mondsee, 146 pp.
- Kizito, Y. S., Nauwerck, A., Chapman, L. J., Koste, W. (1993) A limnological survey of some western Uganda crater lakes. Limnologica 23: pp. 335-347
- Kizito, Y. S., Nauwerck, A. (1996) The distribution of planktonic rotifers in Lake Nkuruba, western Uganda. Limnologica 26: pp. 263-273
- Kling, G. W. (1988) Comparative transparency, depth of mixing, and stability of stratification in lakes of Cameroon, West Africa. Limnol. Oceanogr. 33: pp. 27-40
- Kramer, D. L., Lindsey, C. C., Moodie, G. E. E., Stevens, E. D. (1978) The fishes and the aquatic environment of the central Amazon basin, with particular reference to respiratory patterns. Can. J. Zool. 56: pp. 717-729 CrossRef
- Lewis, W. M. (1973) A limnological survey of Lake Mainit, Philippines. int. Rev. ges. Hydrobiol. 58: pp. 801-818 CrossRef
- Lewis, W. M. (1973) The thermal regime of Lake Lanao (Philippines) and its theoretical implications for tropical lakes. Limnol. Oceanogr. 18: pp. 200-217
- Lewis, W. M. (1984) A five-year record of temperature, mixing, and stability for a tropical lake (Lake Valencia, Venezuela). Arch. Hydrobiol. 99: pp. 340-346
- Livingstone, D. A., Melack, J. M. Some lakes of sub-Saharan Africa. In: Taub, F. B. eds. (1984) Ecosystems of the World 23: Lakes and Reservoirs. Elsevier, Amsterdam, pp. 467-497
- Löffler, H. (1964) The limnology of tropical high-mountain lakes. Verh. int. Ver. Limnol. 25: pp. 176-193
- Löffler, H., 1969. Tropical high mountain lakes: their distribution, ecology and zoogeographic importance. In Carl Troll (ed.), Geoecology of the Mountainous Regions of the Tropical Americas. Proceedings of the UNESCO Symposium. Mexico. 1966: 57–79.
- MacIntyre, S., Melack, J. M. (1982) Meromixis in an equatorial African soda lake. Limnol. Oceanogr. 27: pp. 595-609 CrossRef
- Melack, J. M. (1978) Morphometric, physical and chemical features of the volcanic crater lakes of western Uganda. Arch. Hydrobiol. 84: pp. 430-453
- Melack, J.M. (1979) Photosynthesis and growth of Spirulina platensis (Cyanophyta) in an equatorial lake (Lake Simbi, Kenya). Limnol. Oceanogr. 24: pp. 753-760
- Nordlie, F. G. (1972) Thermal stratification and annual heat budget of a Florida sinkhole lake. Hydrobiologia 40: pp. 183-200 CrossRef
- Prosser, M. V., Wood, R. B., Baxter, R. M. (1968) The Bishoftu crater lakes: A bathymetric and chemical study. Arch. Hydrobiol. 65: pp. 309-324
- Ruttner, F. (1931) Hydrographische und hydrochemische Beobachtungen auf Java, Sumatra, and Bali. Arch Hydrobiol. Suppl. 8: pp. 197-454
- Talling, J. F. (1963) Origin of stratification in an African rift lake. Limnol. Oceanogr. 8: pp. 68-78 CrossRef
- Timms, B. V. (1975) Basic limnology of two crater lakes in Western Victoria. Proc. R. Soc. Victoria 87: pp. 159-165
- Timms, B. V. (1976) A comparative study of the limnology of three maar lakes in Western Victoria I. Physiography and physicochemical features. Aust. J. mar. Freshwat. Res. 27: pp. 35-60 CrossRef
- Viner, A. B. (1984) Resistance to mixing in New Zealand lakes. New Zealand J. mar. Freshwater Res. 18: pp. 73-82 CrossRef
- Welcomme, R. L. (1979) Fisheries Ecology of Floodplain Rivers. Longman, New York
- Wetzel, R. G. (1975) Limnology. W. B. Saunders Co., Philadelphia
- Wood, R. B., Prosser, M. V., Baxter, R. M. (1976) The seasonal pattern of thermal characteristics of four of the Bishoftu crater lakes, Ethiopia. Freshwat. Biol. 6: pp. 519-530 CrossRef
- Dissolved oxygen and thermal regimes of a Ugandan crater lake
Volume 385, Issue 1-3 , pp 201-211
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- anoxic hypolimnion
- volcanic crater lake
- heat budget
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- Author Affiliations
- 1. Department of Zoology, University of Florida, Gainsville, FL, 326111, U.S.A
- 2. Wildlife Conservation Society, 2300 Southern Boulevard, Bronx, NY, 10460, U.S.A.
- 3. Center for Wetlands, Department of Environmental Engineering Sciences, University of Florida, Gainsville, FL, 326111, U.S.A