Abstract
Structure, quantitative indicators, distribution features and main communities of macrobenthos of Malokurilskaya Bay (Shikotan Island) are described. Four taxa defined the total biomass of macrozoobenthos: polychaetes, bivalves, decapods, and gastropods. The main regularities of the distribution of macrozoobenthos are given. Four bottom communities are marked: native communities of Chaetozone setosa + Macoma nipponica, Macoma nipponica + Liocyma fluctuosa, Pagurus ochotensis, and the community of the inner aquatic area of the port of Capitella capitata + Chaetozone setosa. Suspension / filter feeders, deposit feeders and detritus feeders dominate in the trophic structure of macrozoobenthos. The trophic community “suspension / filter feeders + detritus feeders” occupies the central and southern parts of the aquatic area on the fine-grained sands. The trophic community “deposit feeders + detritus feeders” is marked on the silts of the eastern part and on the fine-grained sands of the western part of the Bay. The trophic community “scavengers / detritus feeders / browsing + suspension / filter feeders” is localized at the exit of the Bay on medium-grained sands. Anthropogenic influence is the main factor affecting the distribution and abundance of macrozoobenthos.
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