Changes in zooplankton abundance and community structure in the cooling channel system of the Konin and Patnow power plants [Poland]
2009
Tunowski, J.,Inland Fisheries Institute, Olsztyn (Poland). Dept. of Hydrobiology
The changes in crustacean and rotifer plankton communities in channel systems cooling system for the Konin and Patnow power plants (central Poland) were analysed. Only small amounts of zooplankton (Rotifera and Crustacea biomass) were detected in the channel systems investigated in this study. In intake channels, the total zooplankton population ranged from 100 to 200 indiv./l and biomass normally did not exceed 1 mg/l. The zooplankton population did not exhibit unambiguous changes immediately after moving across the stream condensers zone (thermal shock) or immediately after the turbines of the pumping station on one of the channels (mechanical and pressure stress). Greater zooplankton mortality rates were recorded in the summer when the temperature of released water exceeded 30 deg C along with a larger rise in temperature (5-6 deg C)
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