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Unexpected absence of island endemics: long distance dispersal in higher latitude sub Antarctic Siphonaria (Gastropoda: Euthyneura) species

Authordc.contributor.authorGonzález Wevar, Claudio 
Authordc.contributor.authorSegovia, Nicolás 
Authordc.contributor.authorRosenfeld, Sebastián 
Authordc.contributor.authorOjeda, Jaime 
Authordc.contributor.authorHune, Mathias 
Authordc.contributor.authorNaretto, Javier 
Authordc.contributor.authorSaucede, Thomas 
Authordc.contributor.authorBrickle, Paul 
Authordc.contributor.authorMorley, Simon 
Authordc.contributor.authorFeral, Jean Pierre 
Authordc.contributor.authorSpencer, Hamish G. 
Authordc.contributor.authorPoulin, Elie 
Cita de ítemdc.identifier.citationJournal of Biogeography. 2018;45: 874–884es_ES
Abstractdc.description.abstractAim: We assess biogeographical patterns, population structure and the range of species in the pulmonate genus Siphonaria across the sub-Antarctic. We hypothesized that locally endemic cryptic species will be found across the distribution of these direct-developing limpets in the sub-Antarctic. Location: The sub-Antarctic coasts of the Southern Ocean including South America, the Falkland/Malvinas, South Georgia, Kerguelen and Macquarie Islands. Methods: Multi-locus phylogenetic reconstructions, mtDNA time-calibrated divergence time estimations and population-based analyses of Siphonaria populations were used at the scale of the Southern Ocean. Results: We resolve two widely distributed lineages of Siphonaria (S. lateralis and S. fuegiensis) across the sub-Antarctic. MtDNA divergence time estimates suggest that they were separated around 4.0 Ma (3.0 to 8.0 Ma). Subsequently both species followed different evolutionary pathways across their distributions. Low levels of genetic diversity characterize the populations of both species, reflecting the role of Quaternary glacial cycles during their respective demographic histories, suggesting high levels of dispersal among geographically distant localities. Main conclusions: Siphonaria lateralis and S. fuegiensis constitute sister and broadly co-distributed species across the sub-Antarctic. Unexpected transoceanic similarities and low levels of genetic diversity in both these direct-developing species imply recurrent recolonization processes through long-distance dispersal to isolated sub-Antarctic islands. For such groups of Southern Ocean invertebrates, rafting may be more effective for long-distance dispersal than a free-living planktotrophic larval stage. This biogeographical model may explain why many marine species lacking a dispersal phase exhibit broad distributions, low genetic diversity and low population structure over thousands of kilometres.es_ES
Patrocinadordc.description.sponsorshipFondecyt Initiation Project 11140087 Instituto de Ecologia y Biodiversidad P05-002 ICM PFB 023 Fondecyt Regular Project 1151336 IPEV program 1044 Protekeres_ES
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile*
Link to Licensedc.rights.uri*
Sourcedc.sourceJournal of Biogeographyes_ES
Keywordsdc.subjectAntarctic circumpolar currentes_ES
Keywordsdc.subjectDirect developerses_ES
Keywordsdc.subjectLong distance dispersales_ES
Keywordsdc.subjectOceanic biogeographyes_ES
Keywordsdc.subjectSub Antarctices_ES
Títulodc.titleUnexpected absence of island endemics: long distance dispersal in higher latitude sub Antarctic Siphonaria (Gastropoda: Euthyneura) specieses_ES
Document typedc.typeArtículo de revistaes_ES
Indexationuchile.indexArtículo de publicación ISIes_ES

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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile