Diatom composition in the ice suspensions of the Mid-Amur

The first data on diatom composition in the ice suspensions of the Amur River in winter are presented. 14 species with varieties from 7 families are found, 2 species of them being recorded for the first time in the south part of the Far East. The basis of aggregations is the centric species, especially from the class Coscinodiscophyсeae, family Stephanodiscaceae and genus Stephanodiscus. Stephanodiscus hantzschii as the indicator of polluted waters stands out among others diatoms by frequency of occurrence and ecology.