Gregory Thom results 7
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Habitat specialization predicts demographic response and vulnerability of floodplain birds in AmazoniaNARA Subscribed
The annual flooding cycle of Amazonian rivers sustains the largest floodplains on Earth, which harbour a unique bird community. Recent studies suggest that habitat specialization drove different patterns of population structure and gene flow in floodplain birds. However, the lack of a direct estimate of habitat affinity prevents a proper test of its effects on population histories. In this work, we used occurrence data, satell...
Although vicariant processes are expected to leave similar genomic signatures among codistributed taxa, ecological traits such as habitat and stratum can influence genetic divergence within species. Here, we combined landscape history and habitat specialization to understand the historical and ecological factors responsible for current levels of genetic divergence in three species of birds specialized in seasonally flooded hab...
Aim The distribution and connectivity of floodplain environments along major Amazonian rivers changed considerably over time following physiographic and climatic events. However, how historical alteration in floodplain habitats affected endemic species' demography and diversification is not fully understood. We tested if historical demographic changes of populations occurring on the floodplains of a major Amazon Basin tributar...
Aim We aim to test the biogeographic drivers of diversification and gene‐flow at the Isthmus of Panama using a species complex of suboscine birds as a case study. We specifically evaluate whether diversification in these birds is better explained by continuous parapatry or a Refuge Model of periodic isolation and gene‐flow due glacial cycling. Location The Isthmus of Panama (Neotropics). Taxon Pachyramphus aglaiae and Pachyram...
TRY plant trait database – enhanced coverage and open accessNARA Subscribed
Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodivers...
Establishing links between phenotypic and genotypic variation is a central goal of evolutionary biology, as they might provide important insights into evolutionary processes shaping genetic and species diversity in nature. One of the more intriguing possibilities is when no genetic divergence is found to be associated with conspicuous phenotypic divergence. In that case, speciation theory predicts that phenotypic divergence ma...
Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islandsNARA Subscribed
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 ge...
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