. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. 250 BIOLOGY OF THE SEAS OF THE four groups: (1) high Arctic, bathypelagic with a preponderance of echino- derms, Foraminifera, small-sized molluscs and polychaetes; (2) high Arctic shallow-water forms, also with a preponderance of echinoderms, mostly small brittle stars; (3) high Arctic forms from the littoral shallows with a pre- ponderance of molluscs; and (4) low Arctic Barents Sea g^5 6 ?2 ?????14 Fig. 107. A chart of the distribution of the bottom biocoenoses of the Kara Sea (
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. 250 BIOLOGY OF THE SEAS OF THE four groups: (1) high Arctic, bathypelagic with a preponderance of echino- derms, Foraminifera, small-sized molluscs and polychaetes; (2) high Arctic shallow-water forms, also with a preponderance of echinoderms, mostly small brittle stars; (3) high Arctic forms from the littoral shallows with a pre- ponderance of molluscs; and (4) low Arctic Barents Sea g^5 6 ?2 ?????14 Fig. 107. A chart of the distribution of the bottom biocoenoses of the Kara Sea (Filatova and Zenkevitch, 1957). 1 Portlandia aestua- riarum; 2 Portlandia arctica; 3 Astarte borealis placenta; 4 Ophiocten sericeum; 5 Ophiopleura borealis; 6 Ophiopleura-Elpidia; 7 Spio- chaetopterus typicus. Quantitative distribution of benthos. In spite of its great qualitative variety the bathypelagic fauna of the Kara Sea is much inferior in numbers to the benthos of the southern half of the Barents Sea (Fig. 109); however, in some regions of the Kara Sea it is higher than the benthos biomass of its northern part. The average benthos biomass of the western part of the Sea is 50 g/m2. As can be seen from the chart, the benthos biomass of the central part of the Sea, in the area of brown muds, is less than 5 g/m2, and at times is no more. 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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