Gene flow in the Antarctic bivalve Aequiyoldia eightsii (Jay, 1839) suggests a role for the Antarctic Peninsula Coastal Current in larval dispersal.

Autor:	Muñoz-Ramírez CP; Instituto de Entomología, Facultad de Ciencias Básicas, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile.; Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile.; Centro de Investigación en Biodiversidad y Ambientes Sustentables (CIBAS), Universidad Católica de la Santísima Concepción, Concepción, Chile., Barnes DKA; British Antarctic Survey, Natural Environment Research Council, Cambridge, UK., Cárdenas L; Centro FONDAP de Investigación Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Instituto de Ciencias Ambientales y Evolutivas, Facultad de Ciencias, UniversidadAustral de Chile, Valdivia, Chile., Meredith MP; British Antarctic Survey, Natural Environment Research Council, Cambridge, UK., Morley SA; British Antarctic Survey, Natural Environment Research Council, Cambridge, UK., Roman-Gonzalez A; College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall TR10 9EZ, UK., Sands CJ; British Antarctic Survey, Natural Environment Research Council, Cambridge, UK., Scourse J; College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall TR10 9EZ, UK., Brante A; Facultad de Ciencias, Universidad Católica de la Santísima Concepción, Concepción, Chile.; Centro de Investigación en Biodiversidad y Ambientes Sustentables (CIBAS), Universidad Católica de la Santísima Concepción, Concepción, Chile.
Jazyk:	angličtina
Zdroj:	Royal Society open science [R Soc Open Sci] 2020 Sep 16; Vol. 7 (9), pp. 200603. Date of Electronic Publication: 2020 Sep 16 (Print Publication: 2020).
DOI:	10.1098/rsos.200603
Abstrakt:	The Antarctic Circumpolar Current (ACC) dominates the open-ocean circulation of the Southern Ocean, and both isolates and connects the Southern Ocean biodiversity. However, the impact on biological processes of other Southern Ocean currents is less clear. Adjacent to the West Antarctic Peninsula (WAP), the ACC flows offshore in a northeastward direction, whereas the Antarctic Peninsula Coastal Current (APCC) follows a complex circulation pattern along the coast, with topographically influenced deflections depending on the area. Using genomic data, we estimated genetic structure and migration rates between populations of the benthic bivalve Aequiyoldia eightsii from the shallows of southern South America and the WAP to test the role of the ACC and the APCC in its dispersal. We found strong genetic structure across the ACC (between southern South America and Antarctica) and moderate structure between populations of the WAP. Migration rates along the WAP were consistent with the APCC being important for species dispersal. Along with supporting current knowledge about ocean circulation models at the WAP, migration from the tip of the Antarctic Peninsula to the Bellingshausen Sea highlights the complexities of Southern Ocean circulation. This study provides novel biological evidence of a role of the APCC as a driver of species dispersal and highlights the power of genomic data for aiding in the understanding of the influence of complex oceanographic processes in shaping the population structure of marine species. Competing Interests: We declare we have no competing interests. (© 2020 The Authors.)
Databáze:	MEDLINE
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