Phylogeography and Pleistocene demographic history of the endangered marsh deer (Blastocerus dichotomus) from the Río de la Plata Basin

Márquez, Arístide; Maldonado, Jesús E.; González, Susana; Beccaceci, Marcelo D.; García, José Eduardo; Duarte, José Maurício Barbanti

doi:10.1007/s10592-005-9067-8

Cited by 37 publications

(31 citation statements)

References 40 publications

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“…Our expansion time estimates suggest that the studied species may have been exploring the area before the Holocene period, following an increase in moisture between 32,000 and 20,000 years ago in central Brazil (Ledru, 1993;SalgadoLaboriau et al, 1997). Our data are also in concordance with the pattern of demographic expansion reported for a species with similar habitat requirements, the marsh deer (Blastocerus dichotomus Illiger, 1815), in the same period and region (Marquez et al, 2006).…”

Section: Conservation Implicationssupporting

confidence: 90%

“…Clapperton (1993) proposed that the Pantanal region exhibited an arid climate during the last glacial period (25,000-15,000 ybp). More recent studies performed in areas near the Pantanal have identified a much humid weather than the previously suggested (de Oliveira, 1992;Ledru, 1993;Ferraz-Vicentini and Salgado-Laboriau, 1996;Assine and Soares, 2004). Our expansion time estimates suggest that the studied species may have been exploring the area before the Holocene period, following an increase in moisture between 32,000 and 20,000 years ago in central Brazil (Ledru, 1993;SalgadoLaboriau et al, 1997).…”

Section: Conservation Implicationssupporting

confidence: 57%

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Genetic diversity and evidence of recent demographic expansion in waterbird populations from the Brazilian Pantanal

Lopes

Lama

2007

Braz. J. Biol.

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The present study determined nuclear and mitochondrial (mtDNA) levels of genetic variability and phylogeographic patterns in breeding populations of Roseate Spoonbill (N = 57), Wood Stork (N = 89), and Jabiru Stork (N = 30), sampled in the Brazilian Pantanal. These species were selected since they are bioindicators of wetlands' health and are threatened in other parts of their distribution. As they are in close association with this ecosystem, they are appropriate for studying the effects of Pleistocene climatic changes on their demographic patterns. Levels of nuclear genetic diversity in Pantanal populations were not significantly different from those of other populations throughout the American continent, where they are considered threatened or of special concern. Reduced levels of mtDNA genetic diversity were observed in the Central American population of Jabiru Stork in comparison to the Pantanal population. Recent demographic expansion in the Pantanal was markedly evidenced by unimodal patterns of mismatch distribution and Fu's Fs neutrality test in these three species. We hypothesize that the average time of population expansion (between 30,843 and 14,233 years before present) is associated to responses of these birds' populations to paleoclimatic changes in these wetlands during the last glaciation period. We recommend special conservation efforts with the Jabiru Stork populations, a genetic monitoring program based on mtDNA, and an ecological characterization of these waterbirds species throughout their distribution range.Keywords: waterbirds, Pantanal, populations, genetic variability. Diversidade genética e evidências de expansão demográfica recente nas populações de aves aquáticas do Pantanal brasileiroResumo O presente estudo determinou níveis de variabilidade nuclear e mitocondrial (DNAmit) e padrões filogeográficos de populações reprodutivas de colhereiro (N = 57), cabeça-seca (N = 89) e tuiuiú (N = 30) do Pantanal brasileiro. Estas espécies foram selecionadas porque são bioindicadoras da integridade das áreas alagáveis e se encontram ameaça-das em outras partes da sua área de distribuição. Devido à sua estreita associação com esse tipo de ecossistema, seu estudo permite verificar os efeitos das mudanças climáticas do Pleistoceno nos seus padrões demográficos. Níveis de diversidade genética nuclear nas populações pantaneiras não diferiram significativamente dos encontrados em outras populações ao longo do continente americano onde são consideradas ameaçadas ou como de especial interesse para conservação. Níveis reduzidos de variabilidade genética DNAmit foram observados nas populações de tuiuiú da América Central, quando comparadas às populações do Pantanal. A expansão demográfica recente das três espécies no Pantanal ficou marcadamente evidenciada pelos padrões unimodais da distribuição das diferenças pareadas e pelo teste de neutralidade de Fs de Fu. Hipotetizamos que o tempo médio de expansão populacional (entre 30.843 e 14.233 anos antes do presente) está associado as respostas destas p...

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Section: Conservation Implicationssupporting

confidence: 90%

Section: Conservation Implicationssupporting

confidence: 57%

Genetic diversity and evidence of recent demographic expansion in waterbird populations from the Brazilian Pantanal

Lopes

Lama

2007

Braz. J. Biol.

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“…The mitochondrial DNA (mtDNA) control region has been extensively used in conservation studies of many species of vertebrates (Eizirik et al, 1998;Möller et al, 2001;Montoya-Burgos, 2003;Cantanhede et al, 2005;Márquez et al, 2006;Barnett et al, 2006;Tchaicka et al, 2007). Due to the high polymorphism on its 5' end in vertebrates (Avise, 1994;Taberlet, 1996), this segment has been widely used in populational studies of mustelids such as Gulo gulo (Wilson et al, 2000;Chappell et al, 2004), Mustela putorius (Davison et al, 2000), Martes foina (Davison et al, 2001), Enhydra lutris (Larson et al, 2002), and Lutra lutra (Mucci et al, 1999;Cassens et al, 2000;Pérez-Haro et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

Genetic diversity of the Neotropical otter (Lontra longicaudis Olfers, 1818) in Southern and Southeastern Brazil

Eizirik

2007

Braz. J. Biol.

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The Neotropical otter is one of the least known otter species, and it is considered to be threatened to various degrees throughout its geographic range. Little information exists on the ecological characteristics of this species, and no genetic study has been published about it until now, hampering the design of adequate conservation strategies for its populations. To contribute with genetic information to comprehensive conservation efforts on behalf of L. longicaudis, we characterized the molecular diversity of the 5' portion of the mtDNA control region in samples from this species collected in Southern and Southeastern Brazil. The sequence analysis revealed a high level of haplotype diversity (h = 0.819; SE = 0.0052) and nucleotide variability ranging from 0.0039 to 0.0067. One of the sampled haplotypes was the most common in both regions and, from this sequence, several other (locally occurring) haplotypes could be derived by single point mutations. No significant genetic differentiation was observed between the Southern and Southeastern regions.Keywords: Lontra longicaudis, mitochondrial DNA, control region, genetic diversity. Diversidade genética da lontra Neotropical (Lontra longicaudis Olfers, 1818) no Sul e Sudeste do Brasil ResumoA lontra Neotropical é uma das espécies de lontras menos conhecidas e apresenta diferentes graus de ameaça ao longo de sua distribuição geográfica. Pouca informação existe a respeito de aspectos ecológicos desta espécie e nenhum estudo genético foi publicado até o momento, dificultando a delimitação de estratégias adequadas de conservação para suas populações. Para contribuir com informação genética aos esforços de conservação de L. longicaudis, a diversidade molecular da porção 5' da região controladora do DNA mitocondrial foi caracterizada em amostras desta espécie coletadas nas regiões Sul e Sudeste do Brasil. A análise das seqüências revelou um alto nível de diversidade haplotípica (h = 0,819; SE = 0,0052) e variabilidade nucleotídica entre 0,0039 a 0,0067. Um dos haplótipos encontrados foi o mais comum em ambas as regiões e, desta seqüência, diversos outros haplótipos (de ocorrência restrita) podem ter se derivado através de mutações pontuais. Nenhuma diferenciação genética significante foi observada entre as regiões Sul e Sudeste.Palavras-chave: Lontra longicaudis, DNA mitocondrial, região controladora, diversidade genética.

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“…Studies conducted in some Neotropical deer using this region as genetic marker, as in the pampas deer and the gray brocket deer, showed that this is very polymorphic and informative (González et al, 1998;Bidegaray et al, 2003). But in other species as the huemul and the marsh deer it showed discrete variation, being informative to conduct phylogeographic studies (Jara et al, 2005;Márquez et al, 2006).…”

Section: Genetic Variationmentioning

confidence: 99%

“…The use of microsatellites to estimate population size can be based on: Capture Mark Recapture method (Seber, 1982) and rarefaction analysis (Kohn et al, 1999). Few studies have compared genetic estimation with field data estimations to test reliability and accuracy only in bear (Belleiman et al, 2005) not yet in neotropical mammals.…”

Section: Population Estimationmentioning

confidence: 99%

Non invasive methods for genetic analysis applied to ecological and behavioral studies in Latino-America

González

Duarte

2007

R. Bras. Zootec.

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-Documenting the presence and abundance of the neotropical mammals is the first step for understanding their population ecology, behavior and genetic dynamics in designing conservation plans. The combination of field research with molecular genetics techniques are new tools that provide valuable biological information avoiding the disturbance in the ecosystems, trying to minimize the human impact in the process to gather biological information. The objective of this paper is to review the available non invasive sampling techniques that have been used in Neotropical mammal studies to apply to determine the presence and abundance, population structure, sex ratio, taxonomic diagnostic using mitochondrial markers, and assessing genetic variability using nuclear markers. There are a wide range of non invasive sampling techniques used to determine the species identification that inhabit an area such as searching for tracks, feces, and carcasses. Other useful equipment is the camera traps that can generate an image bank that can be valuable to assess species presence and abundance by morphology. With recent advances in molecular biology, it is now possible to use the trace amounts of DNA in feces and amplify it to analyze the species diversity in an area, and the genetic variability at intraspecific level. This is particularly helpful in cases of sympatric and cryptic species in which morphology failed to diagnose the taxonomic status of several species of brocket deer of the genus Mazama.

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Phylogeography and Pleistocene demographic history of the endangered marsh deer (Blastocerus dichotomus) from the Río de la Plata Basin

Cited by 37 publications

References 40 publications

Genetic diversity and evidence of recent demographic expansion in waterbird populations from the Brazilian Pantanal

Genetic diversity and evidence of recent demographic expansion in waterbird populations from the Brazilian Pantanal

Genetic diversity of the Neotropical otter (Lontra longicaudis Olfers, 1818) in Southern and Southeastern Brazil

Non invasive methods for genetic analysis applied to ecological and behavioral studies in Latino-America

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