Abstract
According to literature data and data from the South Scientifi c Institute of Fishery and Oceanology investigations a retrospective (1934, 1955, 1986, 1989) analyses of distribution, structure and dynamic of the bottom macrozoobentose community in Kerch Channel of the Black sea was made. Their present condition are evaluated according to the results of the summer joint Russian-Ukrainian bentos survey of 2010. Considerable changes in the character of distribution and structure of biocenois of bentos organisms for the last 75 years were foundid. Species of the bottom animals and areas of the channel, where their maximum degradation was happened were revealed. Possible mechanisms of fi xed hydrobiological transformations are proposed.
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