. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. Phyto-plankton Winter Spring Summer. Winter ????? ? ? Autumn. Summer ??? Autumn Fig. 5. Biological seasons of plankton. A General indices (Bogorov). ? Phyto-plankton development (Usachev). 1 Cir- cumpolar part of Arctic Ocean, 2 Central region Of Kara Sea, 3 Laptev Sea, 4 Northern part of Barents Sea, 5 Southwestern part of Barents Sea. Zooplankton According to V. Bogorov's estimate, the zooplankton of our northern seas on the basis of existing data includes 321 species* of which 41 species are * I
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. Phyto-plankton Winter Spring Summer. Winter ????? ? ? Autumn. Summer ??? Autumn Fig. 5. Biological seasons of plankton. A General indices (Bogorov). ? Phyto-plankton development (Usachev). 1 Cir- cumpolar part of Arctic Ocean, 2 Central region Of Kara Sea, 3 Laptev Sea, 4 Northern part of Barents Sea, 5 Southwestern part of Barents Sea. Zooplankton According to V. Bogorov's estimate, the zooplankton of our northern seas on the basis of existing data includes 321 species* of which 41 species are * It must be borne in mind that the populations of separate seas and parts of them have not been studied equally well, as regards the qualitative variety of the fauna and flora. The Kara Sea plankton is probably as varied as that of the Barents Sea, but the former has been the subject of a more comprehensive Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zenkevich, L. A. (Lev Aleksandrovich), 1889-1970. New York, Interscience Publishers
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