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High and distinct range-edge genetic diversity despite local bottlenecks

2013Journal article Restricted access
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dc.contributor.authorAssis, J.
dc.contributor.authorCastilho Coelho, N.
dc.contributor.authorAlberto, F.
dc.contributor.authorValero, Myriam
dc.contributor.authorRaimondi, P. T.
dc.contributor.authorReed, D. C.
dc.contributor.authorSerrão, Ester
dc.date.accessioned2014-05-29T10:15:32Z
dc.date.available2014-05-29T10:15:32Z
dc.date.issued2013
dc.date.updated2014-05-21T11:22:14Z
dc.description.abstractThe genetic consequences of living on the edge of distributional ranges have been the subject of a largely unresolved debate. Populations occurring along persistent low latitude ranges (rear-edge) are expected to retain high and unique genetic diversity. In contrast, currently less favourable environmental conditions limiting population size at such range-edges may have caused genetic erosion that prevails over past historical effects, with potential consequences on reducing future adaptive capacity. The present study provides an empirical test of whether population declines towards a peripheral range might be reflected on decreasing diversity and increasing population isolation and differentiation. We compare population genetic differentiation and diversity with trends in abundance along a latitudinal gradient towards the peripheral distribution range of Saccorhiza polyschides, a large brown seaweed that is the main structural species of kelp forests in SW Europe. Signatures of recent bottleneck events were also evaluated to determine whether the recently recorded distributional shifts had a negative influence on effective population size. Our findings show decreasing population density and increasing spatial fragmentation and local extinctions towards the southern edge. Genetic data revealed two well supported groups with a central contact zone. As predicted, higher differentiation and signs of bottlenecks were found at the southern edge region. However, a decrease in genetic diversity associated with this pattern was not verified. Surprisingly, genetic diversity increased towards the edge despite bottlenecks and much lower densities, suggesting that extinctions and recolonizations have not strongly reduced diversity or that diversity might have been even higher there in the past, a process of shifting genetic baselines.por
dc.identifier.citationAssis, J.F.; Castilho Coelho, N.; Alberto, F.; Valero, M.; Raimondi, P.; Reed, D.; Alvares Serrão, E. High and Distinct Range-Edge Genetic Diversity despite Local Bottlenecks, PLoS ONE, 8, 7, SI-SI, 2013.por
dc.identifier.doihttp://dx.doi.org/10.1371/journal.pone.0068646
dc.identifier.issn1932-6203
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4115
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherPublic Library of Sciencepor
dc.titleHigh and distinct range-edge genetic diversity despite local bottleneckspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPageSlpor
oaire.citation.issue7por
oaire.citation.startPageSlpor
oaire.citation.titlePLoS ONEpor
oaire.citation.volume8por
person.familyNameAssis
person.familyNameAlberto
person.familyNameSerrao
person.givenNameJorge
person.givenNameFilipe
person.givenNameEster A.
person.identifier1488456
person.identifierC-6686-2012
person.identifier.ciencia-id5C1D-05B6-29F7
person.identifier.ciencia-idBD15-2AC7-8AA3
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0002-6624-4820
person.identifier.orcid0000-0003-0593-3240
person.identifier.orcid0000-0003-1316-658X
person.identifier.ridG-9688-2012
person.identifier.scopus-author-id53463298700
person.identifier.scopus-author-id6701653422
person.identifier.scopus-author-id7004093604
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationc794f76b-9001-4ac1-913a-bb0f3aab6ef5
relation.isAuthorOfPublication4e95893d-e3c7-462f-a897-49bb8999b65b
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery45ccfe90-155c-4d6f-9e86-8f0fd064005f

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