Zooplankton structure in heated lakes with differing thermal regimes and water retention
2009
Tunowski, J.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Hydrobiology
The impact water retention time and increased water temperature had on the composition and abundance of zooplankton was studied. Crustacea and Rotifera were examined from lakes Slesinskie and Lichenskie, which are part of the water cooling system for the Konin and Patnow power plants in Poland. Lake Slesinskie is included in the cooling system periodically (from May to September) when the long cooling cycle is in operation, and its waters are heated moderately (lesser 25 deg C) with a water retention time of about two weeks. The zooplankton biomass in this basin in summer ranges from 1.5 to 4.0 mg/l. In Lake Lichenskie, which is heated continuously (about 30 deg C) and has a water retention time of about 5 days, the zooplankton abundance (lesser 100 indiv./l) and biomass (lesser 0.5 mg/l) noted was low. In addition to temperature, one of the factors that affects zooplankton development in both lakes is the short water retention time
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