Phylogeography of the temperate marine bivalve Cerastoderma edule (Linnaeus, 1758) (Bivalvia: Cardiidae) in the Subarctic: Unique diversity and strong population structuring at different spatial scales: Cardiidae) in the Subarctic: Unique diversity and strong population structuring at different spatial scales

Evgeny Genelt-Yanovskiy, Sophia Nazarova, Oleg Tarasov, Natalia Mikhailova, Petr Strelkov

Research output

1 Citation (Scopus)

Abstract

Using mitochondrial COI sequencing, we explored the genetic diversity and population structuring of the common cockle Cerastoderma edule (Linnaeus, 1758) in the Norwegian and Barents Seas. Phylogeographic diversity and hence the evolutionary history of C. edule on the Scandinavian and Russian coastlines were found to be richer than expected for populations of temperate species in postglacially colonized seas. A major phylogeographic break at Lofoten Islands separated a group of subarctic populations dominated by a distinct star-shaped clade of haplotypes from those to the south, extending to the North Sea and having highest gene diversities (h). At the northeastern edge of the range of C. edule, the Russian Murman coast, populations show a mosaic structure with considerable admixture of haplotypes from the south and high local-scale variation in haplotype diversity (ranging between 0 and 0.8). To explain this mosaic we refer to the core-satellite metapopulation model, with Norwegian populations as core, and Murman populations as satellites. Our results contradict the conventional biogeographic paradigm implying lack of metapopulation structuring in marine broadcast spawning invertebrates. Hypotheses considered to explain the origin of the unique variation in cockles from Northern Norway involve an early postglacial colonization and establishment of these populations (10–12 ka ago), a persistent oceanographic break at Lofoten, and a mitochondrial selective sweep associated with the postglacial recolonization of the subarctic seas by the boreal C. edule.

Translated title of the contributionФилогеография бореальной морской ракушки Cerastoderma edule (Linnaeus, 1758) (Bivalvia: Cardiidae) в субарктике: уникальное разнообразие и популяционная структурированность
Original languageEnglish
Pages (from-to)67-79
Number of pages13
JournalJournal of Zoological Systematics and Evolutionary Research
Volume57
Issue number1
Early online date11 Jun 2018
DOIs
Publication statusPublished - 1 Feb 2019

Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology
  • Molecular Biology
  • Genetics

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