Reduced genetic diversity and increased population differentiation in peripheral and overharvested populations of <i>Gigartina skottsbergii</i> (Rhodophyta, Gigartinales) in southern Chile

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dc.contributor.authorFaugeron, S
dc.contributor.authorMartínez, EA
dc.contributor.authorCorrea, JA
dc.contributor.authorCardenas, L
dc.contributor.authorDestombe, C
dc.contributor.authorValero, M
dc.date.accessioned2025-01-21T01:07:53Z
dc.date.available2025-01-21T01:07:53Z
dc.date.issued2004
dc.description.abstractThis study assesses two hypotheses on the genetic diversity of populations of Gigartina skottsbergii Setchell et Gardner (Rhodophyta, Gigartinales) at the border of the species distribution: 1) peripheral populations display a reduced genetic diversity compared with central populations, and 2) genetic differentiation is higher among peripheral than among central populations. Two peripheral and four central populations were sampled along the Chilean coast and 113 haploid individuals were analyzed using 17 random amplification of polymorphic DNA loci. The genetic diversity was estimated by allele diversity (H-e), allele richness (A), and the mean pair-wise differences among multilocus genotypes. All three estimates consistently and significantly indicated a lower genetic diversity within the peripheral than within the central populations. Genetic differentiation between the two peripheral populations was stronger (F-ST=0.35) than between central populations at similar spatial scales (F-ST ranging from 0 to 0.25). In addition, it appeared from the distribution of pair-wise differences that peripheral populations are in demographic expansion after a recent bottleneck. The results are discussed in the specific context of potential overharvesting of these wild populations.
dc.fuente.origenWOS
dc.identifier.doi10.1111/j.1529-8817.2004.03114.x
dc.identifier.eissn1529-8817
dc.identifier.issn0022-3646
dc.identifier.urihttps://doi.org/10.1111/j.1529-8817.2004.03114.x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96394
dc.identifier.wosidWOS:000221644400002
dc.issue.numero3
dc.language.isoen
dc.pagina.final462
dc.pagina.inicio454
dc.revistaJournal of phycology
dc.rightsacceso restringido
dc.subjectgenetic diversity
dc.subjectmismatch distribution
dc.subjectoverharvest
dc.subjectRAPD
dc.subjectRhodophyta
dc.subjectseaweed
dc.subjectspecies border
dc.subject.ods15 Life on Land
dc.subject.ods14 Life Below Water
dc.subject.ods13 Climate Action
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.titleReduced genetic diversity and increased population differentiation in peripheral and overharvested populations of <i>Gigartina skottsbergii</i> (Rhodophyta, Gigartinales) in southern Chile
dc.typeartículo
dc.volumen40
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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