Phytoplankton of the middle portion of Southern Bug River is represented by 334 algae species (358 infr. taxa) including original and literature data. The basis of taxonomical structure consists of Chlorophyta (44.4 %), Bacillariophyta (22.8 %), Euglenophyta (10.8 %) and Cyanoprokaryota (10.4 %). Main genus are Desmodesmus, Euglena, Trachelomonas, Phacus, Monoraphidium, Nitzschia, Scenedesmus, Oocystis, Merismopedia, Microcystis. The change of taxonomical structure with the compare of literature data was noted, 30 species of algae, rare for Ukrainian flora, were revealed.

Keywords: algal flora, phytoplankton, taxonomical structure, Southern Bug River, middle portion

Full text: PDF 305K