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Title: East is East and West is West: Population genomics and hierarchical analyses reveal genetic structure and adaptation footprints in the keystone species Paracentrotus lividus (Echinoidea)
Author: Carreras Huergo, Carlos
García-Cisneros, Alex
Wangensteen Fuentes, Owen S. (Simon)
Ordóñez Sánchez, Víctor
Palacín Cabañas, Cruz
Pascual Berniola, Marta
Turon Barrera, Xavier
Keywords: Equinoderms
Genètica de poblacions
Population Genetics
Issue Date: 14-Dec-2019
Publisher: John Wiley & Sons
Abstract: Aim The Atlanto‐Mediterranean edible purple sea urchin, Paracentrotus lividus, is a commercially exploited keystone species in benthic communities. Its browsing activity can deeply modify the littoral landscape, and changes in its abundance are of major conservation concern. This species is facing nowadays contrasting anthropogenic pressures linked to predator release, exploitation and sea warming. Management of this key species requires knowledge of its genetic structure, connectivity and local adaptation. Our goal was to assess the current global status of the species under a genomic perspective. Location Atlanto‐Mediterranean shores from Morocco and France to Turkey. Methods We used genotyping by sequencing (GBS) of 241 individuals belonging to 11 populations spanning the known range of distribution of the species. We obtained 3,348 loci for population genomics and outlier analyses. Results We identified significant genetic structure and a gradient matching the longitudinal position of the localities. A hierarchical analysis revealed two main clusters (Atlantic and Mediterranean) and subtler patterns of differentiation within them. Candidate markers for selection identified between and within these two main clusters were mostly different, likely indicating different selective pressures. Adaptation to maximum salinity and maximum temperature appeared as an important driver of the transition between Atlantic and Mediterranean basins. Other stressors, such as minimum temperature or range of temperature, seem to define the structuring within the Mediterranean.
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It is part of: Diversity and Distributions, 2019, vol. 26, p. 382-398
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ISSN: 1366-9516
Appears in Collections:Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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