. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE ARAL SEA 665 (1935) and I. Kulichenko (1944). The most recent comprehensive study was undertaken by E. Yablonskaya (1959), who has distinguished seven main biocoenoses. Practically the whole Sea is encircled (Fig. 315, 1) at little depth (2 to 10 m) by a zone of vegetation. Dreissena polymorpha is the pre- dominant form. The mean mass of charial algae is 67T58 g/m2; among the Zostera in the Maloe More—22-255 g/m2; among the soft macrophytes. ? r Fig. 315. Main benthos biocoenoses of the Aral Se
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE ARAL SEA 665 (1935) and I. Kulichenko (1944). The most recent comprehensive study was undertaken by E. Yablonskaya (1959), who has distinguished seven main biocoenoses. Practically the whole Sea is encircled (Fig. 315, 1) at little depth (2 to 10 m) by a zone of vegetation. Dreissena polymorpha is the pre- dominant form. The mean mass of charial algae is 67T58 g/m2; among the Zostera in the Maloe More—22-255 g/m2; among the soft macrophytes. ? r Fig. 315. Main benthos biocoenoses of the Aral Sea in 1954 to 1957 (Yablonskaya). See text for interpretation. (Potamogeton and others)—10-874 g/m2. This zone is followed by the sandy zone, which has a predominance of Adacna minima (Fig. 315,2) with a bio- mass of 6-181 g/m2. Still deeper (10 to 24 m) on the silty sand (Fig. 315, 3) the Dreissena and Adacna biocoenosis develops with a biomass of 15 to 14 g/m2. Chironomid larvae are the dominant form on the mud soil of Adzhibai Inlet (Fig. 315, 4), producing a biomass of up to 16-2 g/m2. All the central part of the Sea, with depths down to 27 m, on sand and grey mud soils is populated by the Chironomus, Dreissena and Adacna biocoenosis. 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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