Struktura zbiorowisk fitoplanktonu w strefie szuwaru i pelagialu w Jeziorze Budzynskim

The research of the qualitative and quantitative phytoplankton structure of the rush and open water zones of two basins of the Budzynskie Lake differing in the presence of submerged macrophytes was conducted. A greater variety of phytoplankton species was present in the overgrow basin, as a result of enrichment of the zone of open water above submerged macrophytes by periphyton taxa. In the same basin the reduction of phytoplankton taxa numbers and biomass appeared, that can be connected with pressure of zooplankton grazing and with repressing influence of macrophytes.