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Feed-backs between genetic structure and perturbation-driven decline in seagrass (Posidonia oceanica) meadows

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dc.contributor.authorDiaz-Almela, E.
dc.contributor.authorARNAUD-HAOND, Sophie
dc.contributor.authorVliet, M. S.
dc.contributor.authorÁlvarez, E.
dc.contributor.authorMarbà, N.
dc.contributor.authorDuarte, C. M.
dc.contributor.authorSerrão, Ester
dc.date.accessioned2014-06-05T09:09:48Z
dc.date.available2014-06-05T09:09:48Z
dc.date.issued2007
dc.date.updated2014-05-21T13:35:53Z
dc.description.abstractWe explored the relationships between perturbation-driven population decline and genetic/genotypic structure in the clonal seagrass Posidonia oceanica, subject to intensive meadow regression around four Mediterranean fish-farms, using seven specific microsatellites. Two meadows were randomly sampled (40 shoots) within 1,600 m2 at each site: the “impacted” station, 5–200 m from fish cages, and the “control” station, around 1,000 m downstream further away (considered a proxy of the pre-impact genetic structure at the site). Clonal richness (R), Simpson genotypic diversity (D*) and clonal sub-range (CR) were highly variable among sites. Nevertheless, the maximum distance at which clonal dispersal was detected, indicated by CR, was higher at impacted stations than at the respective control station (paired t-test: P < 0.05, N = 4). The mean number of alleles (Â) and the presence of rare alleles ( r) decreased at impacted stations (paired t-test: P < 0.05, and P < 0.02, respectively, N = 4). At a given perturbation level (quantified by the organic and nutrient loads), shoot mortality at the impacted stations significantly decreased with CR at control stations (R 2 = 0.86, P < 0.05). Seagrass mortality also increased with  (R 2 = 0.81, P < 0.10), R (R 2 = 0.96, P < 0.05) and D* (R 2 = 0.99, P < 0.01) at the control stations, probably because of the negative correlation between those parameters and CR. Therefore, the effects of clonal size structure on meadow resistance could play an important role on meadow survival. Large genotypes of P. oceanica meadows thus seem to resist better to fish farm-derived impacts than little ones. Clonal integration, foraging advantage or other size-related fitness traits could account for this effect.por
dc.identifier.citationDiaz-Almela, E.; Arnaud-Haond, S.; Vliet, M.S.; Álvarez, E.; Marbà, N.; Duarte, C.M.; Serrão, E.A.Feed-backs between genetic structure and perturbation-driven decline in seagrass (Posidonia oceanica) meadows, Conservation Genetics, 8, 6, 1377-1391, 2007.por
dc.identifier.doihttp://dx.doi.org/ 10.1007/s10592-007-9288-0
dc.identifier.issn1566-0621
dc.identifier.otherAUT: ESE00527;
dc.identifier.urihttp://hdl.handle.net/10400.1/4189
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSpringer Verlagpor
dc.relation.publisherversionhttp://link.springer.com/article/10.1007%2Fs10592-007-9288-0por
dc.subjectClonal sub-rangepor
dc.subjectGenetic diversitypor
dc.subjectPopulation declinepor
dc.subjectGenotypic diversitypor
dc.subjectFish-farm impactspor
dc.titleFeed-backs between genetic structure and perturbation-driven decline in seagrass (Posidonia oceanica) meadowspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1391por
oaire.citation.issue6por
oaire.citation.startPage1377por
oaire.citation.titleConservation Geneticspor
oaire.citation.volume8por
person.familyNameARNAUD-HAOND
person.familyNameSerrao
person.givenNameSophie
person.givenNameEster A.
person.identifierC-6686-2012
person.identifier.ciencia-id5A15-FF67-4075
person.identifier.ciencia-id5B13-B26E-B1EC
person.identifier.orcid0000-0001-5814-8452
person.identifier.orcid0000-0003-1316-658X
person.identifier.scopus-author-id6602532118
person.identifier.scopus-author-id7004093604
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication2b10c79a-8ca9-4449-ba02-0c240f00d921
relation.isAuthorOfPublication45ccfe90-155c-4d6f-9e86-8f0fd064005f
relation.isAuthorOfPublication.latestForDiscovery45ccfe90-155c-4d6f-9e86-8f0fd064005f

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