Phytoplankton productivity in littoral adjacent to peat-bog in two limnologically distinct lakes (Łęczyńsko-Włodawskie Lake District)

Phytoplankton productivity in peat-bog littoral of two limnologically distinct lakes of Łęczyńsko-Włodawawskie Lake District: Piaseczno and Bikcze, was studied in summers 2006–2007. Following parameters were determined: phytoplankton primary gross production, chlorophyll a concentration, and basic physicochemical factors of waters. Values of biological trophy indices at both lakes did not exceed the level typical for mesotrophy. Achieved results for lake Piaseczno littoral revealed the lack of significant influences of mucked peat-bog on trophic status of waters, as well as non-univocal effects of peat-bog on low productivity of phytoplankton in littoral of eutrophic lake Bikcze.