No population genetic structure in a widespread aquatic songbird from the Neotropics

Cadena, Carlos Daniel; Gutiérrez‐Pinto, Natalia; Dávila, Nicolás; Chesser, R. Terry

doi:10.1016/j.ympev.2010.12.014

Cited by 42 publications

(41 citation statements)

References 27 publications

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“…But the band-sharing using the different indices such as similarity and heterozygosity are sufficient to distinct some of the sampling locality in the Garhwal and Kumaun region. But within population it is difficult to detect the level of genetic diversity using the RAPD marker in our study and similar in other study which suggested the use of mitochondrial markers (Ali et al, 2004;Cadena et al, 2011). The UPGMA analysis permitted the clustering of different individuals of three Schistura species from Garhwal and Kumaun region with distinguished clade at population level but unable to distinguished individuals of the same population and similar finding were also reported by (Rodrigues et al, 2007).…”

Section: Discussionsupporting

confidence: 81%

Genetic Diversity between Populations of the Genus Schistura McClelland from the Garhwal and Kumaun Region Using RAPD Marker

Negi¹,

Joshi²

2015

Asian J. of Biotechnology

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Genetic based study provide emphasis on the population study of geographically isolated population, gene flow among them and evolutionary history of the species. In the present study, we aimed to detect the genetic variations in species of genus Schistura from Uttarakhand. Very little is known for the pattern of distribution and genetic diversity of the species of genus Schistura from the Garhwal and Kumaun region. Out of six primer only four primers were used to generate the fragments patterns from the samples collected. Polymorphism within and between the populations were assayed and total 60 bands were amplified ranging from 1-150 kb. Maximum number of bands was observed in Schistura montanus from the Srinagar, Garhwal and Uttarkashi regions. Total 60 bands were amplified in the all four primer with high percentage of polymorphic loci 50% Schistura montanus from Garhwal region and 28.8% in the S. montanus from the Kumaun region were observed. The level of heterozygosity were found 0.006-0.18 in the all three species. The percentage of polymorphism was 50% within the populations and high heterozygosity the sample of S. montanus when compared with other species. Observed pattern of RAPD markers reveals that the samples from the Garhwal region exhibit high diversity and used four primers are sufficient to distinguish the different population in the both region except the samples of the S. gangiticus of Garhwal region.

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Section: Discussionsupporting

confidence: 81%

Genetic Diversity between Populations of the Genus Schistura McClelland from the Garhwal and Kumaun Region Using RAPD Marker

Negi¹,

Joshi²

2015

Asian J. of Biotechnology

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“…The high intra‐ and interspecific homogenization among riparian assemblages documented for other Amazonian organisms (e.g. Aleixo, ; Cadena et al ., ) was corroborated, especially for the assemblages associated with large rivers (Igapó forests). This indicates that dispersal across and along the river is facilitated for these organisms.…”

Section: Discussionmentioning

confidence: 63%

The combined influence of riverine barriers and flooding gradients on biogeographical patterns for amphibians and squamates in south‐eastern Amazonia

Moraes

Pavan²,

Barros

et al. 2016

Journal of Biogeography

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Aim Our aim was to investigate how the distance to water (flooding gradients) and riverine barriers (Tapajós and Jamanxim rivers) influence the distributional patterns of amphibian and squamate assemblages in the middle Tapajós River region, south‐eastern Amazonia. We also considered the planned hydroelectric dams on both rivers in reviewing the possible impacts of these factors on the amphibian and squamate assemblages. Location Middle Tapajós River system, south‐eastern Amazonia. Methods We conducted diurnal and nocturnal surveys combining pitfall traps and active searches along both banks of the Tapajós and Jamanxim rivers. We identified specimens using an integrative morphological, acoustic, ecological and molecular approach and evaluated the influence of riverine barriers and distance to water using uni‐ and multivariate ordinations, regressions and ANOVA. Results We found changes in species composition for both groups along the flooding gradient and differential riverine barrier effects. The rivers restricted the distribution of 33% of the amphibian species and 8% of the squamates. For amphibians, the main distributional barrier was the Tapajós River, while for squamates both rivers were of similar importance. The assemblages most affected by riverine barriers were non‐riparian amphibians and squamates, as well as riparian amphibians associated with small streams. The functional groups most affected were small, diurnal terrestrial amphibians and small–medium, diurnal partly tree‐dwelling squamates. Main conclusions The Tapajós River is a distributional boundary for lineages centred in western and eastern Amazonia. The fact that many taxa occur on both banks suggests that the Tapajós is a recent or semi‐permeable barrier, while the Jamanxim is an even more recent or weaker barrier. Anthropogenic activities that affect water level, flooding cycles and river flow may influence these natural patterns and cause changes to the equilibrium of the riverine barrier effect. Studies seeking to identify these influences should focus on the most affected functional groups.

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“…Speciose groups such as canopy specialists and species restricted to seasonally flooded habitats with potentially higher dispersal capacity have shown different biogeographic patterns and lower intraspecific divergence than understory species [62], [63]. For example, genetic studies conducted on species associated with rivers and seasonally flooded forests such as Xiphorhynchus kienerii and X. obsoletus [64] and Chrysomus icterocephalus [65] have revealed very low levels of sequence divergence and widespread haplotype sharing, likely due to higher rates of gene flow along waterways.…”

Section: Discussionmentioning

confidence: 99%

A Trans-Amazonian Screening of mtDNA Reveals Deep Intraspecific Divergence in Forest Birds and Suggests a Vast Underestimation of Species Diversity

et al. 2012

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The Amazonian avifauna remains severely understudied relative to that of the temperate zone, and its species richness is thought to be underestimated by current taxonomy. Recent molecular systematic studies using mtDNA sequence reveal that traditionally accepted species-level taxa often conceal genetically divergent subspecific lineages found to represent new species upon close taxonomic scrutiny, suggesting that intraspecific mtDNA variation could be useful in species discovery. Surveys of mtDNA variation in Holarctic species have revealed patterns of variation that are largely congruent with species boundaries. However, little information exists on intraspecific divergence in most Amazonian species. Here we screen intraspecific mtDNA genetic variation in 41 Amazonian forest understory species belonging to 36 genera and 17 families in 6 orders, using 758 individual samples from Ecuador and French Guiana. For 13 of these species, we also analyzed trans-Andean populations from the Ecuadorian Chocó. A consistent pattern of deep intraspecific divergence among trans-Amazonian haplogroups was found for 33 of the 41 taxa, and genetic differentiation and genetic diversity among them was highly variable, suggesting a complex range of evolutionary histories. Mean sequence divergence within families was the same as that found in North American birds (13%), yet mean intraspecific divergence in Neotropical species was an order of magnitude larger (2.13% vs. 0.23%), with mean distance between intraspecific lineages reaching 3.56%. We found no clear relationship between genetic distances and differentiation in plumage color. Our results identify numerous genetically and phenotypically divergent lineages which may result in new species-level designations upon closer taxonomic scrutiny and thorough sampling, although lineages in the tropical region could be older than those in the temperate zone without necessarily representing separate species. In-depth phylogeographic surveys are urgently needed to avoid underestimating tropical diversity, and the use of mtDNA markers can be instrumental in identifying and prioritizing taxa for species discovery.

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No population genetic structure in a widespread aquatic songbird from the Neotropics

Cited by 42 publications

References 27 publications

Genetic Diversity between Populations of the Genus Schistura McClelland from the Garhwal and Kumaun Region Using RAPD Marker

Genetic Diversity between Populations of the Genus Schistura McClelland from the Garhwal and Kumaun Region Using RAPD Marker

The combined influence of riverine barriers and flooding gradients on biogeographical patterns for amphibians and squamates in south‐eastern Amazonia

A Trans-Amazonian Screening of mtDNA Reveals Deep Intraspecific Divergence in Forest Birds and Suggests a Vast Underestimation of Species Diversity

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