Studies of the phytoplankton in the River Šešupė basin[Šešupės baseino upių fitoplanktono tyrimai]. – Botanica Lithuanica, 3(1): 53–69

The phytoplankton of the River Šešupė and its tributaries was investigated in 1970–1992. Totally 197 taxa were recorded in the investigated streams. In the phytoplancton dominated diatoms (Bacillariophyceaea) and green algae (Chlorophyceae); they comprised 54 % and 30 % of all recorded taxa, respectively.

Keywords: phytoplankton,species composition, the River Šešupė basin, Lithuania.