Koziichuk E. Phytobenthos in the Kiliya Delta of the Danube River

The paper deals with the patterns of phytobenthos species diversity, taxonomic composition, seasonal dynamics of cell count and biomass, informational diversity, dominant complex, primary production and ecological diversity in the various aquatic ecosystems of the Danube River Kiliya Delta (river arms, fresh-water and brackish-water bays). Identifies the main ecological factors (salinity, bottom sediments type, current velocity) making effect upon phytobenthos. Bottom microalgae respond to changes in ecological conditions by modifying their structure and functioning through increasing or decreasing their species diversity, cell count, biomass and transforming the dominant complex structure.