Abstract
Benthic fauna of the Oga Bay (the Kara Sea, Novaya Zemlya) was studied in 20152016 during the IO RAS expeditions on RV "Akademik Mstislav Keldysh". 5 grab stations (15 samples) at depths of 70140 m were sampled. Three macrobenthic communities consecutively replaced each others from the inner near-glacier part of the gulf towards the outher slope. The main factor determining the distribution of macrobenthic communities in the Oga Bay is the concentration of suspended matter in the water column and in the near-bottom layer, that caused by a very powerful level of sedimentation from the Goluboy (Oga) glacier. The depletion of benthic communities (qualitative and quantitative) which is typical for Arctic fjords with glacial inflow was shown. The specific community with the dominance of bivalve Portlandia arctica inhabits the main part of the bay. The peculiarities of the benthos of Arctic glacial bays are discussed.
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