. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE SEA OF OKHOTSK 797 with Macoma baltica, 275 specimens; Amphipoda, 625 specimens per 1 m a mean biomass of no less than 1 kg/m2. The upper horizons of the Sea of Okhotsk sublittoral are covered with large sea-weed beds with their accompanying fauna. In the bays at depths of 0 to 5 m grow the Sargassum sea-weeds Cystophyllum and Zostera. Lami- naria (L. agardti, L. bullata, L. saccharina, L. digitata, Alaria esculenta, Fig. 397. Echinarachnius parma colonies in La Perouse Strait at a depth of
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE SEA OF OKHOTSK 797 with Macoma baltica, 275 specimens; Amphipoda, 625 specimens per 1 m a mean biomass of no less than 1 kg/m2. The upper horizons of the Sea of Okhotsk sublittoral are covered with large sea-weed beds with their accompanying fauna. In the bays at depths of 0 to 5 m grow the Sargassum sea-weeds Cystophyllum and Zostera. Lami- naria (L. agardti, L. bullata, L. saccharina, L. digitata, Alaria esculenta, Fig. 397. Echinarachnius parma colonies in La Perouse Strait at a depth of 40 m (photographed by Zenkevitch). membranacea, A. ochotensis, Lessonia laminarioides) form dense growths somewhat deeper (5 to 20 m). All these vegetation beds are populated by a varied fauna of Bryozoa, Hydroidea, Mollusca, Polychaeta and Crustacea. Still deeper (from 15 to 30 m) red sea-weeds become significant {Phycodrya simosa, Ph. fimbriata, Odonthalia dentata, O. ochotensis, and various Polysiphonia sp. and Ptilota sp.) with a fauna of Hydroida, Bryozoa, Polychaeta, Crustacea, Echinodermata and Ascidia. At depths below 30 m the macrophytes gradually disappear, and growths of Porifera, Hydroidea and Bryozoans become significant. The ori- ginality of the bottom fauna of the Sea of Okhotsk is reflected in some details of its composition and distribution. The uncommon biocoenosis of Echinarachnius parma on pure fine-grain sands at depths of 20 to 60 m (Fig. 397) occupies a special place in the fauna. 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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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
