| a genomic investigation of the putative contact zone between divergent brown creeper (certhia americana) lineages: chromosomal patterns of genetic differentiation. | sky islands, or montane forest separated by different lowland habitats, are highly fragmented regions that potentially limit gene flow between isolated populations. in the sky islands of the madrean archipelago (arizona, usa), various taxa display different phylogeographic patterns, from unrestricted gene flow among sky islands to complex patterns with multiple distinct lineages. using genomic-level approaches allows the investigation of differential patterns of gene flow, selection, and genetic ... | 2016 | 26794151 |
| chromosomal patterns of diversity and differentiation in creepers: a next-gen phylogeographic investigation of certhia americana. | with methods for sequencing thousands of loci for many individuals, phylogeographic studies have increased inferential power and the potential for applications to new questions. in songbirds, strong patterns of inter-chromosomal synteny, the published genome of a songbird and the ability to obtain thousands of genetic loci for many individuals permit the investigation of differentiation between and diversity within lineages across chromosomes. here, we investigate patterns of differentiation and ... | 2015 | 25853518 |
| isolation-driven divergence: speciation in a widespread north american songbird (aves: certhiidae). | lineage, or true 'species', trees may differ from gene trees because of stochastic processes in molecular evolution leading to gene-tree heterogeneity. problems with inferring species trees because of excessive incomplete lineage sorting may be exacerbated in lineages with rapid diversification or recent divergences necessitating the use of multiple loci and individuals. many recent multilocus studies that investigate divergence times identify lineage splitting to be more recent than single-locu ... | 2011 | 21933295 |
| cryptic diversity in a widespread north american songbird: phylogeography of the brown creeper (certhia americana). | the identification of species via morphological characteristics has traditionally left cryptic species undescribed in taxa under selection for morphological conservation (or a lack of selection for morphological change). treecreepers (genus: certhia) have a conserved morphological appearance, making it difficult to ascertain relationships in the genus based on morphology alone. recent genetic and song structure studies of eurasian treecreepers identified cryptic species within old world certhia ... | 2011 | 21168520 |
| a meta-analysis of bird responses to uniform partial harvesting across north america. | most data on the effects of partial-harvest silviculture (where live trees are purposely retained at the time of harvest) on birds come from one or a few discrete harvesting treatments. it is thus difficult to infer species responses across a continuous gradient of tree retention from individual studies. to quantify the levels of tree retention expected to produce specified changes in the relative abundance of individual species, we carried out a meta-analysis of 42 studies that examined the imp ... | 2007 | 17883488 |