Littoral fauna in two lakes of different trophy (Bialskie and Piaseczno, Eastern Poland)

Summary

Species composition and abundance of zooplankton and zoobenthos were analysed in the littoral zone of two trophically different lakes: Bialskie and Piaseczno. The occurrence of 261 species (124 zooplankton and 137 zoobenthos species) was stated. A fairly high number of species, indicators of water trophy was found in both lakes. In Lake Piaseczno species preferring oligo- and mesotrophic waters and in Lake Bialskie species living in eutrophic waters predominated. Species composition of fauna in the littoral zone of both lakes was differentiated. Only agricultural sectors had a similar population structure. Most species of high abundance occurred in them.

The results of studies show that eutrophication processes go faster in Lake Bialskie than in Lake Piaseczno.