Abstract
Macrobenthic communities in Baydaratskaya Bay were studied before and after the seafloor pipeline was begun to be laid out in the year 2011. Materials were collected during three surveys in 2007, 2012, and 2013. Ordination of the data based on community structure and composition revealed a clear depthrelated zonality of the communities. Stations deeper than 10 meters were dominated by bivalves, while shallower stations were dominated by nephtyid polychaetes. This structure persisted though the whole period studied, without any pronounced temporal trends. However, several deep-water stations near the pipeline path in the year 2013 revealed a distinct shift in the structure of macrofauna, with large bivalves disappearing, an increased abundance of small polychaetes, and a decrease in total biodiversity. Moreover, macrofauna were absent at one of these stations. We conclude that the structure and distribution of communities are relatively stable and mainly driven by depth. However, there are some local but evident disturbance effects, probably caused by recent human activity (dumping of dredged sediments).
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Original Russian Text © V.N. Kokarev, V.V. Kozlovsky, A.I. Azovsky, 2015, published in Okeanologiya, 2015, Vol. 55, No. 5, pp. 801–807.
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Kokarev, V.N., Kozlovsky, V.V. & Azovsky, A.I. Current state of macrobenthic communities in Baydaratskaya Bay (Kara Sea). Oceanology 55, 724–729 (2015). https://doi.org/10.1134/S0001437015050069
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DOI: https://doi.org/10.1134/S0001437015050069