A comparative analysis of the level of quantitative development of different sized phytoplankton groups in areas with hydrochemical regimes of the northwestern Black Sea and adjacent water bodies has been made. For these areas a higher number of contributions cells with a greater specific surface has been noted characterizing a more rapid metabolic rate. The interrelation between the morpho-structural organization of phytoplankton and the biogenic content of the area under study has been analyzed.

Keywords: phytoplankton, specific surface, morpho-structural organization, biogenic matters

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