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Phenotypic differentiation at southern limit borders: The case study of two fucoid macroalgal species with different life-history traits

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dc.contributor.authorAraújo, R.
dc.contributor.authorSerrão, Ester
dc.contributor.authorSousa-Pinto, I.
dc.contributor.authorÅberg, P.
dc.date.accessioned2014-05-28T14:37:00Z
dc.date.available2014-05-28T14:37:00Z
dc.date.issued2011
dc.date.updated2014-05-21T11:45:30Z
dc.description.abstractMarginal populations are often geographically isolated, smaller, and more fragmented than central populations and may frequently have to face suboptimal local environmental conditions. Persistence of these populations frequently involves the development of adaptive traits at phenotypic and genetic levels. We compared population structure and demographic variables in two fucoid macroalgal species contrasting in patterns of genetic diversity and phenotypic plasticity at their southern distribution limit with a more central location. Models were Ascophyllum nodosum (L.) Le Jol. (whose extreme longevity and generation overlap may buffer genetic loss by drift) and Fucus serratus L. (with low genetic diversity at southern margins). At edge locations, both species exhibited trends in life-history traits compatible with population persistence but by using different mechanisms. Marginal populations of A. nodosum had higher reproductive output in spite of similar mortality rates at all life stages, making edge populations denser and with smaller individuals. In F. serratus, rather than demographic changes, marginal populations differed in habitat, occurring restricted to a narrower vertical habitat range. We conclude that persistence of both A. nodosum and F. serratus at the southern-edge locations depends on different strategies. Marginal population persistence in A. nodosum relies on a differentiation in life-history traits, whereas F. serratus, putatively poorer in evolvability potential, is restricted to a narrower vertical range at border locations. These results contribute to the general understanding of mechanisms that lead to population persistence at distributional limits and to predict population resilience under a scenario of environmental change.por
dc.identifier.citationAraújo, R.; Serrão, E.A.; Sousa-Pinto, I.; Åberg, P.Phenotypic differentiation at southern limit borders: The case study of two fucoid macroalgal species with different life-history traits, Journal of Phycology, 47, 3, 451-462, 2011por
dc.identifier.doihttp://dx.doi.org/DOI: 10.1111/j.1529-8817.2011.00986.x
dc.identifier.issn0022-3646
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4109
dc.language.isoporpor
dc.peerreviewedyespor
dc.publisherPhycological Society of Americapor
dc.subjectAscophyllum nodosumpor
dc.subjectGeographic distribution limitspor
dc.subjectPhenotypic differentiationpor
dc.subjectPopulation persistencepor
dc.titlePhenotypic differentiation at southern limit borders: The case study of two fucoid macroalgal species with different life-history traitspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage462por
oaire.citation.startPage451por
oaire.citation.titleJournal of Phycologypor
oaire.citation.volume47por
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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