Species Composition of the Algae Groups of the Styr River Within Rivnenska Oblast

Abstract

The results of the study of the species composition of the algae groups of the middle reach of the Styr river within Volyn Upland and the lower reach within Volyn Polissya on the territory of Rivnenska oblast are presented. It has been established that the phytoplankton of the river is mainly formed with the participation of species Bacillariophyta, the role of species of Chlorophyta and Euglenophyta is smaller. The largest concentration of different species of plankton algae was observed in Ivanchytsi village, Zarichnensky district in shallow water with a slowed flow. Phytoplankton in the middle of the river near Verben village of Demydivsky district was characterized by a rather poor species composition. The growth of the species diversity of planktonic algae is facilitated by the presence of shallow water and the development of higher water and coastal aquatic vegetation.