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Portlandia-dominated Communities in the Arctic: Taxonomic Composition and Structure along the Geographical Gradient

Authors
  • Mokievsky, V. O.1
  • Udalov, A. A.1
  • Chava, A. I.1
  • Simakova, U. V.1
  • Kokarev, V. N.2
  • Neretina, T. V.3
  • 1 Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, 117218, Russia , Moscow (Russia)
  • 2 Faculty of Biosciences and Aquaculture, Nord University, Bodø, 8049, Norway , Bodø (Norway)
  • 3 Pertzov White Sea Biological Station, Department of Biology, Moscow State University, Moscow, 119991, Russia , Moscow (Russia)
Type
Published Article
Journal
Doklady Earth Sciences
Publisher
Pleiades Publishing
Publication Date
Aug 01, 2020
Volume
493
Issue
2
Pages
645–648
Identifiers
DOI: 10.1134/S1028334X20080140
Source
Springer Nature
Keywords
License
Yellow

Abstract

AbstractThe species composition and structure of bottom communities with a predominance of bivalve mollusks of the Portlandia genus, which are widespread on the shelf of the Russian Arctic, were analyzed. Molecular genetic analysis confirmed that Portlandia aestuariorum and P. arctica are valid species; it has been shown that all P. arctica from different regions belong to the same species regardless their morphological variations. Ten different variants of benthic communities from the White, Kara, Laptev, and East Siberian seas were described, in which P. aestuariorum and P. arctica play the dominant role. No associated species complexes have been identified for Portlandia spp. Communities practically do not have common species, and their composition and structure are determined by the selection of species with similar ecological preferences from the local fauna. The differences in communities are determined by both geographical and environmental factors.

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