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Evidence for rangewide panmixia despite multiple barriers to dispersal in a marine mussel
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Orientador(es)
Resumo(s)
Oceanographic features shape the distributional and genetic patterns of marine species by interrupting or promoting connections among populations. Although general patterns commonly arise, distributional ranges and genetic structure are species-specific and do not always comply with the expected trends. By applying a multimarker genetic approach combined with Lagrangian particle simulations (LPS) we tested the hypothesis that oceanographic features along northeastern Atlantic and Mediterranean shores influence dispersal potential and genetic structure of the intertidal mussel Perna perna. Additionally, by performing environmental niche modelling we assessed the potential and realized niche of P. perna along its entire native distributional range and the environmental factors that best explain its realized distribution. Perna perna showed evidence of panmixia across > 4,000 km despite several oceanographic breaking points detected by LPS. This is probably the result of a combination of life history traits, continuous habitat availability and stepping-stone dynamics. Moreover, the niche modelling framework depicted minimum sea surface temperatures (SST) as the major factor shaping P. perna distributional range limits along its native areas. Forthcoming warming SST is expected to further change these limits and allow the species to expand its range polewards though this may be accompanied by retreat from warmer areas.
Descrição
Palavras-chave
Mytilus-Galloprovincialis Lamarck Population Genetic-Structure Species distribution models Indigenous Perna-Perna Almeria-Oran Front Intertidal Mussels Climate-change South-Africa Multivariate-analysis Surface-temperature
Contexto Educativo
Citação
Editora
Nature Publishing Group