NIKULINA T.V., VSHIVKOVA T.S., LUTAENKO K.A.
V.Ya.Levanidov memorial lectures 2025; (11): 142-151
The species composition of the diatom flora of the estuarine zone of the Chernaya Rechka River in 2022-2023 is represented by 114 species and intraspecific taxa. In the systematic structure, the largest number of taxa belongs to the genera Gomphonema (9 species), Navicula (12 species and variations) and Nitzschia (16 species). In periphyton communities, mass development of diatoms Melosira varians, Nitzschia a . fonticola, N. frustulum, N. inconspicua, Hannaea recta, Navicula lanceolata, N. cryptocephala, Meridion circulare, Ulnaria ulna was noted. The state of waters (the presence of organic pollution) in the Chernaya Rechka River was assessed using the Pantle-Buck method as modified by Sládeček. Analysis of the obtained data showed that, according to the saprobity indices, the waters of the watercourse had β-ο, ο-α and β saprobity degrees, corresponded to the betamesosaprobic zone, class III purity and were classified as slightly polluted waters.
