Charakterystyka fitoplanktonu w sulejowskim zbiorniku zaporowym w latach 1996-1997

The phytoplankton in the Sulejów Reservoir in 1996-1997 was dominant in spring and autumn by diatoms. The cyanobacteria were high only in several months in summer and early autumn. Biomass values was of 0.3 to 63.4 mg dm^˗3. The most abundant were Stephanodiscus hantzschii (Grun.), Aulacoseira granulatu (Ehr.) Simonsen, Asterionella formosa (Hass.), Cyclotella comta (Ehr.) Kutz of diatoms, Trachelomonas volvocina Ehr of euglenids, Pediastrum boryanum (Turp.) Meenegh., Scenedesmus quadricauda (Turp.) Breb. Staurastrum sp. of green algae and M¡crocLstis aeruginosa Kutz and Aphanisozomenon flos-aquae (L.) Ralfs. of cyanobacteria. Corelations between the biomass of phytoplankton and temperature, pH, concentration of nitrate nitrogen and phosphorus in water were determined.