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Range-edge genetic diversity: locally poor extant southern patches maintain a regionally diverse hotspot in the seagrass Zostera marina

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dc.contributor.authorDiekmann, O. E.
dc.contributor.authorSerrão, Ester
dc.date.accessioned2014-05-26T15:02:24Z
dc.date.available2014-05-26T15:02:24Z
dc.date.issued2012
dc.date.updated2014-05-21T11:36:50Z
dc.description.abstractRefugial populations at the rear edge are predicted to contain higher genetic diversity than those resulting from expansion, such as in post-glacial recolonizations. However, peripheral populations are also predicted to have decreased diversity compared to the centre of a species’ distribution. We aim to test these predictions by comparing genetic diversity in populations at the limits of distribution of the seagrass Zostera marina, with populations in the species’ previously described central diversity ‘hotspot’. Zostera marina populations show decreased allelic richness, heterozygosity and genotypic richness in both the ‘rear’ edge and the ‘leading’ edge compared to the diversity ‘hotspot’ in the North Sea ⁄ Baltic region. However, when populations are pooled, genetic diversity at the southern range is as high as in the North Sea ⁄ Baltic region while the ‘leading edge’ remains low in genetic diversity. The decreased genetic diversity in these southern Iberian populations compared to more central populations is possibly the effect of drift because of small effective population size, as a result of reduced habitat, low sexual reproduction and low gene flow. However, when considering the whole southern edge of distribution rather than per population, diversity is as high as in the central ‘hotspot’ in the North Sea ⁄ Baltic region. We conclude that diversity patterns assessed per population can mask the real regional richness that is typical of rear edge populations, which have played a key role in the species biogeographical history and as marginal diversity hotspots have very high conservation value.por
dc.identifier.citationDiekmann, O.E.; Serrão, E.A. Range-edge genetic diversity: Locally poor extant southern patches maintain a regionally diverse hotspot in the seagrass Zostera marina, Molecular Ecology, 21, 7, 1647-16, 2012.por
dc.identifier.doihttp://dx.doi.org/10.1111/j.1365-294X.2012.05500.x
dc.identifier.issn0962-1083
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4082
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWileypor
dc.subjectDiversity hotspotspor
dc.subjectEdge populationspor
dc.subjectSeagrassespor
dc.subjectZostera marinapor
dc.titleRange-edge genetic diversity: locally poor extant southern patches maintain a regionally diverse hotspot in the seagrass Zostera marinapor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1657por
oaire.citation.issue7por
oaire.citation.startPage1647por
oaire.citation.titleMolecular Ecologypor
oaire.citation.volume21por
person.familyNameSerrao
person.givenNameEster A.
person.identifierC-6686-2012
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0003-1316-658X
person.identifier.scopus-author-id7004093604
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery45ccfe90-155c-4d6f-9e86-8f0fd064005f

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