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Drifting fronds and drifting alleles: range dynamics, local dispersal and habitat isolation shape the population structure of the estuarine seaweed Fucus ceranoides

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dc.contributor.authorNeiva, J.
dc.contributor.authorPearson, G. A.
dc.contributor.authorValero, Myriam
dc.contributor.authorSerrão, Ester
dc.date.accessioned2014-05-23T13:08:40Z
dc.date.available2014-05-23T13:08:40Z
dc.date.issued2012
dc.date.updated2014-05-21T11:29:08Z
dc.description.abstractAim: The seaweed Fucus ceranoides is restricted to spatially discrete estuarine habitats and lacks planktonic dispersal phases; it is therefore expected to exhibit strong population differentiation. Its cold-temperate affinities and mtDNA variation imply that the northern part of the species’ range, where F. ceranoides is now ubiquitous, was recently colonized after the onset of the last deglaciation, potentially resulting in areas with greater genetic homogeneity. Here we examine the population structure of F. ceranoides to test these predictions, emphasizing the contrasting genetic signatures of limited dispersal in refugial versus recently colonized regions. Location: North-eastern Atlantic estuaries from Portugal to Norway. Methods: A total of 504 individuals from 21 estuarine sites spanning the entire range of F. ceranoides were sampled and genotyped for nine microsatellite loci. Population structure was inferred from several genotypic and allele-frequency analyses. Geographical patterns of genetic diversity were used to reconstruct the historical biogeography of the species. Results: Genetic diversity and regional population differentiation showed a consistent decline with increasing latitude. Southernmost populations harboured most of the endemic variation, whereas the northern populations (> 55 N) were almost fixed for the same alleles across loci. In southern and central regions of its distribution, F. ceranoides showed striking population subdivision, with many of the sampled estuaries corresponding to coherent genetic units that were easily discriminated from one another with standard clustering methods. Main conclusions: The geographical pattern of genetic diversity supports the long-term refugial status of Iberia and a post-glacial range expansion of F. ceranoides into previously glaciated latitudes. Despite the species’ capacity to colonize newly available habitats, the genetic structure of F. ceranoides outside the recently (re)colonized range reveals that gene flow between populations is extremely low. This study provides a remarkable example of how infrequent and spatially limited dispersal can have contrasting effects at the scales of metapopulation (connectivity) versus range dynamics (habitat tracking), and of how dispersal restrictions can result in either genetic divergence or homogeneity depending on the maturity and demographic conditions of the populations.por
dc.identifier.citationNeiva, J.; Pearson, G.A.; Valero, M.; Serrão, E.A. Drifting fronds and drifting alleles: Range dynamics, local dispersal and habitat isolation shape the population structure of the estuarine seaweed Fucus ceranoides, Journal of Biogeography, 39, 6, 1167-11, 2012.por
dc.identifier.doihttp://dx.doi.org/10.1111/j.1365-2699.2011.02670.x
dc.identifier.issn0305-0270
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4057
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherBlackwellpor
dc.relation.publisherversionhttp://wileyonlinelibrary.com/journal/jbipor
dc.subjectEstuarypor
dc.subjectFucus ceranoidespor
dc.subjectMicrosatellitespor
dc.subjectNorth-eastern Atlanticpor
dc.subjectPopulation structurepor
dc.subjectPleistocene refugiumpor
dc.subjectPost-glacial expansionpor
dc.subjectRaftingpor
dc.titleDrifting fronds and drifting alleles: range dynamics, local dispersal and habitat isolation shape the population structure of the estuarine seaweed Fucus ceranoidespor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1178por
oaire.citation.issue6por
oaire.citation.startPage1167por
oaire.citation.titleJournal of Biogeographypor
oaire.citation.volume39por
person.familyNameMiranda Neiva
person.familyNamePearson
person.familyNameSerrao
person.givenNameJoão
person.givenNameGareth Anthony
person.givenNameEster A.
person.identifierM-3818-2013
person.identifier113536
person.identifierC-6686-2012
person.identifier.ciencia-id191B-5464-41F5
person.identifier.ciencia-id3315-9919-1A52
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0002-5927-4570
person.identifier.orcid0000-0002-0768-464X
person.identifier.orcid0000-0003-1316-658X
person.identifier.ridJ-3911-2013
person.identifier.scopus-author-id54895771800
person.identifier.scopus-author-id55916875600
person.identifier.scopus-author-id7004093604
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication9e246701-725f-473c-afbd-6ec7cd92d759
relation.isAuthorOfPublication0a10c448-c7f5-4c3b-9488-3917c707e35e
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery0a10c448-c7f5-4c3b-9488-3917c707e35e

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