Atlantic forest fragmentation and genetic diversity of an isolated population of the Blue-manakin, Chiroxiphia caudata (Pipridae), assessed by microsatellite analyses

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dc.contributor.authorFrancisco, Mercival R.
dc.contributor.authorGaletti, Mauro [UNESP]
dc.contributor.authorGaletti Jr., Pedro Manoel
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionInstituto de Biologia da Conservação (IBC)
dc.date.accessioned2014-05-27T11:21:49Z
dc.date.available2014-05-27T11:21:49Z
dc.date.issued2006-03-01
dc.description.abstractHabitat fragmentation is predicted to restrict gene flow, which can result in the loss of genetic variation and inbreeding depression. The Brazilian Atlantic forest has experienced extensive loss of habitats since European settlement five centuries ago, and many bird populations and species are vanishing. Genetic variability analysis in fragmented populations could be important in determining their long-term viability and for guiding management plans. Here we analyzed genetic diversity of a small understory bird, the Blue-manakins Chiroxiphia caudata (Pipridae), from an Atlantic forest fragment (112 ha) isolated 73 years ago, and from a 10,000 ha continuous forest tract (control), using orthologous microsatellite loci. Three of the nine loci tested were polymorphic. No statistically significant heterozygote loss was detected for the fragment population. Although genetic diversity, which was estimated by expected heterozygosity and allelic richness, has been lower in the fragment population in relation to the control, it was not statistically significant, suggesting that this 112 ha fragment can be sufficient to maintain a blue-manakin population large enough to avoid stochastic effects, such as inbreeding and/or genetic drift. Alternatively, it is possible that 73 years of isolation did not accumulate sufficient generations for these effects to be detected. However, some alleles have been likely lost, specially the rare ones, what is expected from genetic drift for such a small and isolated population. A high genetic differentiation was detected between populations by comparing both allelic and genotypic distributions. Only future studies in continuous areas are likely to answer if such a structure was caused by the isolation resulted from the forest fragmentation or by natural population structure.en
dc.description.affiliationDepartamento de Genética e Evolução Universidade Federal de São Carlos, Rod. Washington Luis, km 235, CEP 13565-905, São Carlos, SP
dc.description.affiliationUniversidade Estadual Paulista (UNESP) Plant Phenology and Seed Dispersal Research Group Departamento de Ecologia, CEP 13506-900, Rio Claro, SP
dc.description.affiliationInstituto de Biologia da Conservação (IBC), Av. P-13, 293, Rio Claro, SP
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP) Plant Phenology and Seed Dispersal Research Group Departamento de Ecologia, CEP 13506-900, Rio Claro, SP
dc.format.extent21-28
dc.identifierhttp://www.ararajuba.org.br/sbo/ararajuba/artigos/Volume141/volume141.htm
dc.identifier.citationRevista Brasileira de Ornitologia, v. 14, n. 1, p. 21-28, 2006.
dc.identifier.file2-s2.0-41549119457.pdf
dc.identifier.issn0103-5657
dc.identifier.lattes3431375174670630
dc.identifier.scopus2-s2.0-41549119457
dc.identifier.urihttp://hdl.handle.net/11449/68803
dc.language.isoeng
dc.relation.ispartofRevista Brasileira de Ornitologia
dc.relation.ispartofjcr0.565
dc.relation.ispartofsjr0,329
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBirds
dc.subjectForest fragmentation
dc.subjectGenetic variability
dc.subjectManakins
dc.subjectallele
dc.subjectgenetic analysis
dc.subjectgenetic differentiation
dc.subjectgenetic drift
dc.subjectgenetic variation
dc.subjectgenotype
dc.subjecthabitat fragmentation
dc.subjectheterozygosity
dc.subjecthuman settlement
dc.subjectisolated population
dc.subjectpasserine
dc.subjectpopulation structure
dc.subjectspatial distribution
dc.subjectstochasticity
dc.subjectAtlantic Forest
dc.subjectSouth America
dc.subjectAves
dc.subjectChiroxiphia caudata
dc.subjectPipridae
dc.titleAtlantic forest fragmentation and genetic diversity of an isolated population of the Blue-manakin, Chiroxiphia caudata (Pipridae), assessed by microsatellite analysesen
dc.typeArtigo
unesp.author.lattes3431375174670630
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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