Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/17436
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dc.contributor.authorQuintela, Fernando Marques-
dc.contributor.authorGonçalves, Gislene Lopes-
dc.contributor.authorBertuol, Fabrício-
dc.contributor.authorGonzález, Enrique Manuel-
dc.contributor.authorFreitas, Thales Renato Ochotorena de-
dc.date.accessioned2020-06-15T21:42:45Z-
dc.date.available2020-06-15T21:42:45Z-
dc.date.issued2015-
dc.identifier.urihttps://repositorio.inpa.gov.br/handle/1/17436-
dc.description.abstractWe examined the phylogeography of the South American swamp rat Scapteromys tumidus using complete mitochondrial DNA cytochrome b sequences. This species is endemic to the Pampas biome and lives near the coastal plain but also in inland continental areas. The coastal domain of such region experienced a highly dynamic geological history. The inland fraction is part of Precambrian and Mesozoic spills and sedimentary basins, while most of the coastal plain was shaped by transgressive-regressive marine events in the Late Quaternary. As fluctuations in the sea level during this period produced large lateral displacements of the shoreline, originating four barrier-lagoon systems that shaped the present coastline, continental area significantly increased from this time. We hypothesized that the S. tumidus have expanded its range from that period, ramped by its adaptive ability to humid areas. Thus, we examined whether historical Pleistocene events had affected genetic variation of this species along its distributional range. Bayesian phylogenetic analysis and the haplotype network inferred two major genetic clusters along the distribution of S. tumidus. Neutrality tests suggest that populations experienced demographic changes and Bayesian skyline plot evidenced a marked recent demographic expansion pattern, intensified from 350 to 300 kya. Such date coincides with the formation of the lagunar barrier II (dated to ca 325 kya) and the concurrent initial formation of the coastal plain and increase in continental area. © 2015 Deutsche Gesellschaft fü Säugetierkunde.en
dc.language.isoenpt_BR
dc.relation.ispartofVolume 80, Número 6, Pags. 510-517pt_BR
dc.rightsRestrito*
dc.subjectGenetic Analysisen
dc.subjectGenetic Differentiationen
dc.subjectGenetic Variationen
dc.subjectPaleobiogeographyen
dc.subjectPhylogeographyen
dc.subjectPleistoceneen
dc.subjectPopulation Distributionen
dc.subjectGenetics, Populationen
dc.subjectQuaternaryen
dc.subjectRange Expansionen
dc.subjectRodenten
dc.subjectTransgression-regression Cycleen
dc.subjectSouth Americaen
dc.subjectScapteromys Tumidusen
dc.titleGenetic diversity of the swamp rat in South America: Population expansion after transgressive-regressive marine events in the Late Quaternaryen
dc.typeArtigopt_BR
dc.identifier.doi10.1016/j.mambio.2015.08.003-
dc.publisher.journalMammalian Biologypt_BR
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