Repository logo
 
Publication

Genetic differentiation and secondary contact zone in the seagrass Cymodocea nodosa across the Mediterranean-Atlantic transition region

2008-07Journal article Restricted access
Simple item page
dc.contributor.authorAlberto, F.
dc.contributor.authorMassa, S. I.
dc.contributor.authorManent, P.
dc.contributor.authorDiaz-Almela, E.
dc.contributor.authorARNAUD-HAOND, Sophie
dc.contributor.authorDuarte, C. M.
dc.contributor.authorSerrão, Ester
dc.date.accessioned2014-06-06T09:14:09Z
dc.date.available2014-06-06T09:14:09Z
dc.date.issued2008-07
dc.date.updated2014-05-21T13:33:12Z
dc.description.abstractAim  A central question in evolutionary ecology is the nature of environmental barriers that can limit gene flow and induce population genetic divergence, a first step towards speciation. Here we study the geographical barrier constituted by the transition zone between the Atlantic Ocean and the Mediterranean Sea, using as our model Cymodocea nodosa, a seagrass distributed throughout the Mediterranean and in the Atlantic, from central Portugal to Mauritania. We also test predictions about the genetic footprints of Pleistocene glaciations. Location  The Atlantic–Mediterranean transition region and adjacent areas in the Atlantic (Mauritania to south-west Portugal) and the Mediterranean. Methods  We used eight microsatellite markers to compare 20 seagrass meadows in the Atlantic and 27 meadows in the Mediterranean, focusing on the transition between these basins. Results  Populations from these two regions form coherent groups containing several unique, high-frequency alleles for the Atlantic and for the Mediterranean, with some admixture west of the Almeria–Oran Front (Portugal, south-west Spain and Morocco). These are populations where only one or a few genotypes were found, for all but Cadiz, but remarkably still show the footprint of a contact zone. This extremely low genotypic richness at the Atlantic northern edge contrasts with the high values (low clonality) at the Atlantic southern edge and in most of the Mediterranean. The most divergent populations are those at the higher temperature range limits: the southernmost Atlantic populations and the easternmost Mediterranean, both potential footprints of vicariance. Main conclusions  A biogeographical transition region occurs close to the Almeria–Oran front. A secondary contact zone in Atlantic Iberia and Morocco results from two distinct dispersal sources: the Mediterranean and southernmost Atlantic populations, possibly during warmer interglacial or post-glacial periods. The presence of high-frequency diagnostic alleles in present-day disjunct populations from the southernmost Atlantic region indicates that their separation from all remaining populations is ancient, and suggests an old, stable rear edge.por
dc.identifier.citationAlberto, F.; Massa, S.I.; Manent, P.; Diaz-Almela, E.; Arnaud-Haond, S.; Duarte, C.M.; Serrão, E.A.Genetic differentiation and secondary contact zone in the seagrass Cymodocea nodosa across the Mediterranean-Atlantic transition region, Journal of Biogeography, 35, 7, 1279-1294, 2008.por
dc.identifier.doihttp://dx.doi.org/ 10.1111/j.1365-2699.2007.01876.x
dc.identifier.issn0305-0270
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4211
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWileypor
dc.relation.publisherversionhttp://onlinelibrary.wiley.com/doi/10.1111/j.1365-2699.2007.01876.x/abstractpor
dc.subjectBiogeographical barrierpor
dc.subjectClonal plantpor
dc.subjectCymodocea nodosapor
dc.subjectGenetic structurepor
dc.subjectMarine connectivitypor
dc.subjectMicrosatellitespor
dc.subjectPleistocene glacial refugiapor
dc.subjectRange edgepor
dc.subjectSeagrasspor
dc.titleGenetic differentiation and secondary contact zone in the seagrass Cymodocea nodosa across the Mediterranean-Atlantic transition regionpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1294por
oaire.citation.issue7por
oaire.citation.startPage1297por
oaire.citation.titleJournal of Biogeographypor
oaire.citation.volume35por
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.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication4e95893d-e3c7-462f-a897-49bb8999b65b
relation.isAuthorOfPublication2b10c79a-8ca9-4449-ba02-0c240f00d921
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery4e95893d-e3c7-462f-a897-49bb8999b65b

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Genetic differentiation and secondary contact zone in the seagrass Cymodocea nodosa across the Mediterranean-Atlantic transition region.pdf
Size:
656.82 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.61 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CCM2-Artigos (em revistas ou actas indexadas)