Genetic variation in a small bivalve along a retreating glacier fjord, King George Island, Antarctica.

Carlos Muñoz-Ramirez, Maribel Beltrán-Concha, Karla Pérez-Araneda, Chester Sands, David Barnes, Alejandro Roman-Gonzalez, Ander De Lecea, Katherine Retallick, Katrien Van Landeghem, Katy Sheen, Kelly Gonnelli, James D. Scourse, Miguel Bascur, Antonio Brante

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Abstract

Climate change is strongly influencing regions of Antarctica but the consequences on microevolutionary processes have been little studied. Patterns of population genetic diversity were analysed in the Antarctic bivalve Nuculana inaequisculpta (Protobranchia: Nuculanidae) from a fjord with 70 years of documented climate-forced glacier retreat. Thirty-nine individuals from five sites at different distances from the glacier terminus were collected, and the COI gene was sequenced from each individual. No statistically significant genetic differentiation was found between sites nor a significant correlation between the proximity of glaciers and genetic diversity, suggesting a high dispersal capability and therefore, a planktonic larval stage for this species.
Original languageEnglish
Pages (from-to)151-156
JournalRevista de Biología Marina y Oceanografía
Volume56
Issue number2
DOIs
Publication statusPublished - 31 Dec 2021

Keywords

  • COI
  • climate change
  • dispersal capability
  • Western Antarctic Peninsula

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