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Probing Evolutionary Patterns in Neotropical Birds through DNA Barcodes
These findings confirm the efficacy of species delimitation in birds via DNA barcodes, even when tested on a global scale, and demonstrate how large libraries of a standardized gene region provide insight into evolutionary processes.
Conservation of grassland birds in the western hemisphere
“The sweeping vista of the world’ s natural grasslands-be they steppes, savannas, rangelands, punas or prairies-occupy nearly seven billion hectares; over half of the earth’ s land surface. Add to
The similarity between the results of this and previous studies contributes to the growing evidence suggesting that the patterns of the evolution of postzygotic isolation, and the process of speciation in general, are shared among animal groups.
Body mass and habitat correlates of song structure in a primitive group of birds
Positive contrasts of bandwidth were associated with positive contrasts of habitat, confirming that songs of open-habitat species have a wider bandwidth than those of their more closed habitat relatives.
Hybridization patterns and the evolution of reproductive isolation in ducks
The authors' analyses of the number of interspecific crosses in relation to phylogenetic distance found a significant deviation between the observed and expected distribution of crosses controlling for the topology of the Anatinae phylogeny.
Repeated divergent selection on pigmentation genes in a rapid finch radiation
This work sequenced the genomes of a phenotypically diverse set of species to search for differentiated genomic regions, finding many divergent regions contain genes involved in the melanogenesis pathway, with the strongest signal originating from putative regulatory regions.
Molecular phylogenetics and diversification of the genus Sporophila (Aves: Passeriformes).
Preliminary phylogenetic analyses indicated that a rapid radiation within the last half-million years that may be related to the high level of sexual selection present in Sporophila might have been promoted by marine ingressions and egressions that occurred in some southern coastal regions of South America in the Late Pleistocene.
Unique caudal plumage of Jeholornis and complex tail evolution in early birds
Jeholornis reveals that tail evolution was complex and not a simple progression from frond to fan, and probably evolved as the result of complex interactions between natural and sexual selective pressures and served both aerodynamic and ornamental functions.
Convergent Evolution of Hemoglobin Function in High-Altitude Andean Waterfowl Involves Limited Parallelism at the Molecular Sequence Level
A comparative analysis of hemoglobin (Hb) function in eight phylogenetically replicated pairs of high- and low-altitude waterfowl taxa shows that convergent changes in protein function can occur through multiple historical paths, and can involve multiple possible mutations.
Acoustic frequencies and body mass in new world doves
It is shown that closed habitat species use significantly higher MAX than their more open habitat relatives, which contrasts with the one reported in studies based on community-wide comparisons, which in general do not correct song data for phylogeny and body mass, or include oscine species.