Genetic structure and demographic inference of the regular sea urchin Sterechinus neumayeri (Meissner, 1900) in the southern ocean: The role of the last glaciation

Simple item page
dc.contributor.authorDíaz, Angie
dc.contributor.authorGerard, Karin
dc.contributor.authorGonzález-Wevar, Claudio
dc.contributor.authorMaturana, Claudia
dc.contributor.authorFéral, Jean-Pierre
dc.contributor.authorDavid, Bruno
dc.contributor.authorSaucède, Thomas
dc.contributor.authorPoulin, Elie
dc.date.accessioned2018-11-28T18:44:25Z
dc.date.available2018-11-28T18:44:25Z
dc.date.issued2018-06-06
dc.description.abstractOne of the most relevant characteristics of the extant Southern Ocean fauna is its resiliency to survive glacial processes of the Quaternary. These climatic events produced catastrophic habitat reductions and forced some marine benthic species to move, adapt or go extinct. The marine benthic species inhabiting the Antarctic upper continental shelf faced the Quaternary glaciations with different strategies that drastically modified population sizes and thus affected the amount and distribution of intraspecific genetic variation. Here we present new genetic information for the most conspicuous regular sea urchin of the Antarctic continental shelf, Sterechinus neumayeri. We studied the patterns of genetic diversity and structure in this broadcast-spawner across three Antarctic regions: Antarctic Peninsula, the Weddell Sea and Ade lie Land in East Antarctica. Genetic analyses based on mitochondrial and nuclear markers suggested that S. neumayeri is a single genetic unit around the Antarctic continent. The species is characterized by low levels of genetic diversity and exhibits a typical star-like haplotype genealogy that supports the hypothesis of a single in situ refugium. Based on two mutation rates standardized for this genus, the Bayesian Skyline plot analyses detected a rapid demographic expansion after the Last Glacial Maximum. We propose a scenario of rapid postglacial expansion and recolonization of Antarctic shallow areas from a less ice-impacted refugium where the species survived the LGM. Considering the patterns of genetic diversity and structure recorded in the species, this refugium was probably located in East Antarctica.es_ES
dc.description.sponsorshipThis study was funded by the Instituto Antartico Chileno (INACH) grant D05-09 and the Comision Nacional de Investigacion Cientifica y Tecnologica (Conicyt) Ph.D. Grant D-21080136 to AD.es_ES
dc.identifier.citationPloS One 13(6) doi.10.1371/journal.pone.0197611es_ES
dc.identifier.issne1932-6203
dc.identifier.urihttp://hdl.handle.net/20.500.11894/1181
dc.language.isoenes_ES
dc.publisherTzen-Yuh Chiang, National Cheng Kung University, Taiwanes_ES
dc.relation.ispartofPlos Onees_ES
dc.relation.ispartofVol 13(6)
dc.rightsCreative Commons Attribution 4.0 International licensees_ES
dc.subjectCienciaes_ES
dc.subjectEspecies bentónicases_ES
dc.subjectErizo de mar antárticoes_ES
dc.titleGenetic structure and demographic inference of the regular sea urchin Sterechinus neumayeri (Meissner, 1900) in the southern ocean: The role of the last glaciationes_ES
dc.typeArtículoes_ES

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Gonzalez-Wevar_PLOS ONE httpsdoi.org10.1371journal.pone.0197611 June 6, 2018.pdf
Size:
2.09 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Artículos
Identidad del Fin del MundoUniversidad de Magallanes• Avenida Bulnes 01855 • Punta Arenas • ChileTeléfono: +56 61 207135 • Email: walter.molina@umag.clSistema desarrollado por Prodigio Consultores en Sistema Dspace