. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. Cyanophyceae ÑиÑпгнÑÐ½Ð½Ñ Ñ Ñ iitwririiniixxuxii иимг/ÑÑÐ¶Ñ Ð»Ñ// ' \nnixx xi xu Fig. 228. Seasonal changes of certain groups of phytoplankton in the Sea of Azov (Okul). There are only 32 species of mass forms among them. Among the Blue- green algae there are: Microcystis feruginosa, Aphanizomenon flos aquae, Nodularia spumigena f. typica, var. lato-rea, Anabaena knipowitschi, A. hassalii var. macrospora; among the Protozoa, Silico-flagellata: Ebria tripartita; among
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. Cyanophyceae ÑиÑпгнÑÐ½Ð½Ñ Ñ Ñ iitwririiniixxuxii иимг/ÑÑÐ¶Ñ Ð»Ñ// ' \nnixx xi xu Fig. 228. Seasonal changes of certain groups of phytoplankton in the Sea of Azov (Okul). There are only 32 species of mass forms among them. Among the Blue- green algae there are: Microcystis feruginosa, Aphanizomenon flos aquae, Nodularia spumigena f. typica, var. lato-rea, Anabaena knipowitschi, A. hassalii var. macrospora; among the Protozoa, Silico-flagellata: Ebria tripartita; among the peridineans: Exuviella cordata, Proterocentrum micans and Gleno- dinium danicum; among the diatoms: Skeletonema costatum, Thalassiosira nana, Coscinodiscus biconicus, Leptocylindrus danicus, Rhizosolenia calcar- avis, Rh. radiatus, Chaetoceros subtile, Biddulfia mobiliensis, Ditylium bright- welli and Thalassionema nitzschioides. Phytoplankton biomass. The relative significance of phytoplankton in the productive processes is comparatively high, owing to the very weak develop- ment of coastal vegetation. As regards mass the main role in the phyto- plankton is played by the diatoms (about 55 per cent of all the phytoplankton in the whole of the Sea), the peridineans (about 41-2 per cent of all the phyto- plankton, chiefly in the open sea), and to a much lesser extent by the 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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