Structure and distribution of pelagic ostracods (Ostracoda: Myodocopa) in the Arctic Ocean |
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Authors: | A G Bashmanov V G Chavtur |
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Institution: | (1) Ecology Department, Institute of Oceanology, Polish Academy of Sciences, Powstancow Warszawy 55, 81-712 Sopot, Poland;(2) George Deacon Division, National Oceanography Centre, Southampton, SO14 3ZH, UK |
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Abstract: | The study of the pelagic ostracod fauna of the Arctic Ocean based on materials collected by numerous Russian expeditions (1929–1993)
and data from the literature showed the extreme poorness of the Arctic pelagic ostracod fauna, its mainly North Atlantic genesis
and complete isolation from the Pacific fauna. Maximum ostracod abundance was observed in the epipelagic zone, and the greatest
species diversity occurred in the relatively warm deep Atlantic layer throughout the year. To the north, east, and west of
Franz Josef Land and Spitsbergen, the number of species and abundance indices of pelagic ostracods were decreased. In superficial
water layers of the Central Arctic, maximum ostracod density and biomass were recorded in June and September. The best bioindicator
of warm Atlantic water in the Arctic basin is Obtusoecia obtusata; and of cold polar water in the North Atlantic, Boroecia maxima. |
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