Phytoplankton dynamics in the reservoir lake "Żur" on the pomeranian Wda River

One hundred thirty eight taxa of plankton algae were identified in the Żur Reservoir (Cyanoprokaryota 27, Dinophyta 5, Euglenophyta 4, Chrysophyceae 6, Bacillariophyceae 40, Chlorophyta 56). The biomass of spring and summer plankton consisted mainly of diatoms. Based on the species composition, phytoplankton biomass, concentration of chlorophyll a and TSI, the Żur Reservoir was generally classified as moderately eutrophic with distinct trophic diversification of the water at particular studied sites.