Effects of thermal effluents from the Bergum Power Station on the Zooplankton in the Bergumermeer

  • H. W. de Nie
Part of the Developments in Hydrobiology book series (DIHY, volume 11)


The influence of thermal discharge from a 640 MW steam electric power station on the Bergumermeer (shallow, eutrophic lake) was investigated. The temperature of the thermal effluent did not exceed 30 °C. The lake was sampled extensively from 1975 to 1978. Zooplankton densities at different depths in the heated and non-heated parts of the lake were compared. A vital staining technique was used to assess entrainment mortality of cladocerans. The entrainment mortalities for the most abundant cladocerans were only 2 to 3% but for Leptodora kindtii 19% and about 25% for Diaphanosoma brachyurum, Ceriodaphniapulchella and the cyclopoid nauplii. The ecological consequences for the lake ecosystem are discussed.


thermal pollution eutrophic lake copepods cladocerans 


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Copyright information

© Dr W. Junk Publishers, The Hague 1982

Authors and Affiliations

  • H. W. de Nie
    • 1
  1. 1.Tjeukemeer LaboratoryLimnological InstituteOosterzeeThe Netherlands

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