Initial Assessment of Genetic Diversity in Ten Bird Species of South American Cerrado

Bates, John M.; Tello, José G.; Silva, José Maria Cardoso da

doi:10.1076/snfe.38.2.87.15924

Cited by 39 publications

(42 citation statements)

References 34 publications

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“…These patterns may be due to the use of continuous environments at the river banks in a generalist manner by these species. A similar pattern was observed in Chrysomus icterocephalus (Icteridae; Cadena et al., ), but in this case, besides habitat connectivity, the use of open vegetation areas by these birds may also promote gene flow (Bates, Tello, & Da Silva, ). Contrastingly, in a study of bird communities covering over 3,000 km of floodplain forests along the Amazonas and Solimões rivers, Cohn‐Haft, Naka, and Fernandes () found several closely related species to replace each other along the continuous floodplain, with some congruent replacement regions, indicating that other factors such as competitive exclusion and landscape history may promote disjunct distributions of floodplain species.…”

Section: Discussionsupporting

confidence: 55%

Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islands

Choueri

Gubili

Borges

et al. 2017

Journal of Biogeography

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Aim: To investigate the evolution of the avifauna associated to Amazonian fluvial islands, focusing on the Negro River archipelagos.Locations: Fluvial islands in the Amazon Basin.Methods: One generalist floodplain species (Hypocnemoides melanopogon) and three river island specialists (Myrmotherula assimilis, Myrmoborus lugubris and Thamnophilus nigrocinereus) were studied (Thamnophilidae). We sequenced two mitochondrial genes and genotyped eight microsatellite loci. Phylogenetic relationships among intraspecific lineages and divergence times were estimated using Bayesian Inference.Haplotype networks, AMOVA (analysis of molecular variance) and Mantel tests were used to verify the spatial organization of genetic diversity. Gene flow and population structure were evaluated using a dissimilarity index, Bayesian inference and allele frequencies. Historical demography was inferred through neutrality tests and Extended Bayesian skyline plots (EBSP).Results: River island specialists have evolved distinct lineages in different Amazonian tributaries, but exhibit very weak population structure within the Negro river basin. The generalist floodplain species had no population structure along the Amazon basin or within the Negro river basin. Signals of weak and recent (Pleistocene) population expansion were recovered for all species.Main conclusions: River islands specialists show stronger population structure within Amazonia than floodplain generalists. They show a common spatial and temporal pattern of divergence between populations from the Negro islands and western Amazonia (upper and middle Solimões), which may be related to Amazonian drainage evolution. Island specialists had low genetic diversity within the Negro basin, while the higher and unstructured diversity pattern found in the floodplain generalist species may be a consequence of higher dispersal caused by the seasonal flooding pulse. River islands populations have a recent and dynamic history of contact and isolation, with small historical fluctuations of population sizes, which is in sharp contrast with the patterns found in upland forest birds.

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Section: Discussionsupporting

confidence: 55%

Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islands

Choueri

Gubili

Borges

et al. 2017

Journal of Biogeography

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“…This occurs especially for understory species (Burney & Brumfield, ). Otherwise, typically savanna (cerrado) species appear to have low population genetic structure, even across large geographical distances and biogeographical barriers (Bates, Tello & Silva, ). The genetic structure of X. atronitens , on the other hand, shows an intermediate pattern between the observed for forest and savanna taxa.…”

Section: Discussionmentioning

confidence: 99%

Combining phylogeography and landscape genetics ofXenopipo atronitens(Aves: Pipridae), a white sandcampinaspecialist, to understand Pleistocene landscape evolution in Amazonia

Capurucho

Cornelius

Borges

et al. 2013

Biol J Linn Soc Lond

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Open vegetation (campinas and campinaranas) associated with white sand patches occurs in the form of islands in a forested matrix throughout the Amazon basin. Bird species restricted to these habitats have patchy distributions, although connectivity may have been influenced by past glacial cycles as a result of the substitution of forest by savanna. Because these landscape changes are a matter of debate in the history of Amazonia, we studied the diversification of Xenopipo atronitens, a white sand specialist, aiming to infer the effects of past climate changes. The split of Xenopipo atronitens from its sister species, Xenopipo uniformis, may be related to Tepuis erosion and retreat of escarpments during the Miocene, or to a dispersal event. Compared with birds from terra firme forest, X. atronitens has low genetic structure. Low levels of unidirectional gene flow were found from the Guyana Shield to adjacent areas. Demographic expansion starting approximately 25 kyr BP was detected for some populations and is probably related to the Last Glacial Maximum and subsequent climate improvement. Landscape genetic analyses indicate that the forested (terra firme) matrix acts as a barrier for the dispersal of X. atronitens. The results of the present study indicate that glacial cycles have deeply influenced Amazonian biogeographical history, demonstrating a complex interaction between forest and nonforest habitats during the Pleistocene. © 2013 The Linnean Society of London, Biological Journal of the Linnean Society, 2013, 110, 60–76.

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“…Although forests have provided fruitful foci of study, approximately 15% of South America is covered in various types of natural open lowland and montane grassland (Eva et al., ), which hold a unique avifauna of open habitats. The dynamics of diversification in open landscapes may differ greatly from those in forested habitats (Bates, Tello, & Silva, ). For example, grassland taxa are presumably more vagile due to seasonal climatic fluctuations and fire regimes that force movements of grassland inhabitants (Hovick, Elmore, & Fuhlendorf, ; Little, Hockey, & Jansen, ).…”

Section: Introductionmentioning

confidence: 99%

From pampa to puna: Biogeography and diversification of a group of Neotropical obligate grassland birds (Anthus:Motacillidae)

van

Norambuena

Etienne

2019

J Zool Syst Evol Res

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The evolution of Neotropical birds of open landscapes remains largely unstudied. We investigate the diversification and biogeography of a group of Neotropical obligate grassland birds (Anthus: Motacillidae). We use a multilocus phylogeny of 22 taxa of Anthus to test the hypothesis that these birds radiated contemporaneously with the development of grasslands in South America. We employ the R package DDD to analyze the dynamics of Anthus diversification across time in Neotropical grasslands, explicitly testing for shifts in dynamics associated with the Miocene development of grasslands, the putative Pleistocene expansion of arid lowland biomes, and Pleistocene sundering of Andean highland grasslands. A lineage‐through‐time plot revealed increases in the number of lineages, and DDD detected shifts to a higher clade‐level carrying capacity during the late Miocene, indicating an early burst of diversification associated with grassland colonization. However, we could not corroborate the shift using power analysis, probably reflecting the small number of tips in our tree. We found evidence of a divergence at ~1 Mya between northern and southern Amazonian populations of Anthus lutescens, countering Haffer's idea of Pleistocene expansion of open biomes in the Amazon Basin. We used BioGeoBears to investigate ancestral areas and directionality of colonization of Neotropical grasslands. Members of the genus diversified into, out of, and within the Andes, within‐Andean diversification being mostly Pleistocene in origin.

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Initial Assessment of Genetic Diversity in Ten Bird Species of South American Cerrado

Cited by 39 publications

References 34 publications

Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islands

Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islands

Combining phylogeography and landscape genetics ofXenopipo atronitens(Aves: Pipridae), a white sandcampinaspecialist, to understand Pleistocene landscape evolution in Amazonia

From pampa to puna: Biogeography and diversification of a group of Neotropical obligate grassland birds (Anthus:Motacillidae)

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