Search for: [Abstract = "The changes in total biomass of phytoplankton and nannoplankton are presented. The study was conducted in two lakes of the Lublin region\: in a\-mesotrophic, holomictic Lake Piaseczno and in eutrophic, polimictic Lake Bikcze. The biomasses were the highest in spring and in summer, and the lowest in winter. Nannoplankton contribution was the greatest from autumn till early spring. The changes in the percentage of systematic groups depended on the season of the year and on the lake."]

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