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Genetic diversity of a clonal angiosperm near its range limit: The case of Cymodocea nodosa at the Canary Islands

2006Journal article Open access
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dc.contributor.authorAlberto, F.
dc.contributor.authorARNAUD-HAOND, Sophie
dc.contributor.authorDuarte, C. M.
dc.contributor.authorSerrão, Ester
dc.date.accessioned2014-06-03T13:13:33Z
dc.date.available2014-06-03T13:13:33Z
dc.date.issued2006
dc.date.updated2014-05-21T13:39:33Z
dc.description.abstractThe seagrass Cymodocea nodosa forms a unique community in the Canary Islands, where it is classified as an endangered species. Biogeographic theory predicts that clonal species on islands near their distributional limits might show lower proportions of sexual (versus clonal) reproduction, lower genetic diversity, and higher differentiation. We addressed these hypotheses by comparing the genetic structure of C. nodosa from 10 meadows in the 4 main Canary Islands with2Iberian sites (Atlantic and Mediterranean) using microsatellites. A resampling method was proposed to standardize, among samples, genetic variability statistics estimating genotypic richness (R) and allelic richness (Â). A high degree of genotypic richness at the Canary Islands (R = 0.30 – 0.94, mean = 0.67) relative to Iberian sites revealed that C. nodosa performs effective sexual reproduction here. In contrast, lower  suggested a founder effect during the colonization of the archipelago, and similar allelic composition across all islands indicated colonization from a single source. A hotspot of genetic diversity was observed in El Medano (Tenerife), probably associated with lower drift in this meadow, the largest of the archipelago. Predominant north-south surface currents and a greater distance to the mainland could explain lower allelic richness of 2 northwestern sites on different islands and greater similarity between them. All meadows were differentiated from each other and there was no correlation between genetic and geographic distances. This non-equilibrium migration-mutation system was therefore mostly influenced by diversity resulting from genetic drift, and less by the homogenizing effects of gene flow.por
dc.identifier.citationAlberto, F.; Arnaud-Haond, S.; Duarte, C.M.; Serrão, E.A.Genetic diversity of a clonal angiosperm near its range limit: The case of Cymodocea nodosa at the Canary Islands, Marine Ecology Progress Series, 309, Março 2006, 117-129, 2006.por
dc.identifier.doihttp://dx.doi.org/ 10.3354/meps309117
dc.identifier.issn0171-8630
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4161
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherInter Researchpor
dc.relation.publisherversionhttp://www.int-res.com/abstracts/meps/v309/p117-129/por
dc.subjectSeagrasspor
dc.subjectCymodocea nodosapor
dc.subjectClonal plantpor
dc.subjectIsland biogeographypor
dc.subjectMicrosatellitespor
dc.subjectGenetic differentiationpor
dc.subjectMarine dispersalpor
dc.subjectPopulation gene flowpor
dc.titleGenetic diversity of a clonal angiosperm near its range limit: The case of Cymodocea nodosa at the Canary Islandspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage129por
oaire.citation.startPage117por
oaire.citation.titleMarine Ecology Progress Seriespor
oaire.citation.volume309por
person.familyNameAlberto
person.familyNameARNAUD-HAOND
person.familyNameSerrao
person.givenNameFilipe
person.givenNameSophie
person.givenNameEster A.
person.identifier1488456
person.identifierC-6686-2012
person.identifier.ciencia-idBD15-2AC7-8AA3
person.identifier.ciencia-id5A15-FF67-4075
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0003-0593-3240
person.identifier.orcid0000-0001-5814-8452
person.identifier.orcid0000-0003-1316-658X
person.identifier.scopus-author-id6701653422
person.identifier.scopus-author-id6602532118
person.identifier.scopus-author-id7004093604
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication4e95893d-e3c7-462f-a897-49bb8999b65b
relation.isAuthorOfPublication2b10c79a-8ca9-4449-ba02-0c240f00d921
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery45ccfe90-155c-4d6f-9e86-8f0fd064005f

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