Nikulina T.V., Kulbachnyi S.E.
Izvestiya TINRO 2021; 201(3): 640-661
Species composition and taxonomic structure of phytoplankton communities in the main channel of the Amur at Khabarovsk (Russia) were monitored from spring to autumn of 2018-2019. In total, 187 species, varieties and forms of algae and cyanobacteria were found belonged to 8 phyla (Cyanobacteria, Bacillariophyta, Charophyta, Chlorophyta, Heterokontophyta, Rhodophyta, Euglenozoa, and Miozoa) and 75 genera. Diatoms formed the basis of the algal flora (94.7 % of the total species number). Mass vegetations of the diatoms and charophytes were observed with dominance of Asterionella formosa , Aulacoseira islandica , A. ambigua , A. granulata var. granulata , A . granulata var. angustissima , Ulnaria ulna , Diatoma tenue , Nitzschia acicularis , Stephanodiscus sp., Tabellaria flocculosa , Hannaea arcus var. rectus , Melosira varians , Fragilaria capucina var. vaucheriae , F. crotonensis , and Mougeotia sp. ster. Total number and biomass of plankton algae and cyanobacteria varied in the ranges of 1.74-5724.39 million cells/L and 2.5-2648.5 mg/L in spring-summer and 0.07-0.62 million cells/L and 0.2-1.4 mg/L in autumn. The water quality was evaluated by Pantle-Buck method modified by Sládeček as the betamezosaprobic III class (slightly polluted).
