Heterogeneous microgeographic genetic structure of the common cockle (Cerastoderma edule) in the Northeast Atlantic Ocean: biogeographic barriers and environmental factors

• Published in: Heredity
• Main Authors: Vera Rodríguez, Manuel, Wilmes, Sophie B., Maroso, Francesco, Hermida Prieto, Miguel, Casanova Chiclana, Adrián, Iglesias, David, Cao Hermida, María Asunción, Culloty, Sarah C., Mahony, Kate, Orvain, Francis, Bouza Fernández, María del Carmen, Robiins, Peter E., Malham, Shelag K., Lynch, Sharon, Villalba, Antonio, Martínez Portela, Paulino
• Other Authors: Universidade de Santiago de Compostela. Departamento de Zooloxía, Xenética e Antropoloxía Física
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer
• Subjects: Evolutionary genetics; Genetic variation; Northeast Atlantic
• Online Access: http://hdl.handle.net/10347/30992; https://doi.org/10.1038/s41437-023-00646-1

The rights granted to the Author with respect to the Accepted Manuscript are subject to the conditions that (i) the Accepted Manuscript is not enhanced or substantially reformatted by the Author or any third party, and (ii) the Author includes on the Accepted Manuscript an acknowledgement in the following form, together with a link to the published version on the publisher’s website: “This version of the article has been accepted for publication, after peer review (when applicable) but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1038/s41437-023-00646-1. Use of this Accepted Version is subject to the publisher’s Accepted Manuscript terms of use https://www.springernature.com/la/open-research/policies/accepted-manuscript-terms#. Under no circumstances may an Accepted Manuscript be shared or distributed under a Creative Commons or other form of open access licence Knowledge of genetic structure at the finest level is essential for the conservation of genetic resources. Despite no visible barriers limiting gene flow, significant genetic structure has been shown in marine species. The common cockle (Cerastoderma edule) is a bivalve of great commercial and ecological value inhabiting the Northeast Atlantic Ocean. Previous population genomics studies demonstrated significant structure both across the Northeast Atlantic, but also within small geographic areas, highlighting the need to investigate fine-scale structuring. Here, we analysed two geographic areas that could represent opposite models of structure for the species: (1) the SW British Isles region, highly fragmented due to biogeographic barriers, and (2) Galicia (NW Spain), a putative homogeneous region. A total of 9250 SNPs genotyped by 2b-RAD on 599 individuals from 22 natural beds were used for the analysis. The entire SNP dataset mostly confirmed previous observations related to genetic diversity and differentiation; however, neutral ...