The hydrobiological condition transformation at Tchormozskij gulf in connection with separating by dam from Kamskoe reservoir

The transformation of Tchormozskij pond to the gulf of Kamskoe reservoir has defined the reduction of zooplankton and zoobenthos diversity, has increased the ichthyofauna diversity, has changed from mesotrophic statute to oligotrophic one. The daming up of the gulf with formation of a new reservoir (pond) connects with further the reduction of biodiversity, the simplification of benthic community structure and the increase of reservoir statute to mesotrophic one.