targeted reforestation could reverse declines in connectivity for understory birds in a tropical habitat connectivity between protected areas isolated by habitat clearing is a key conservation goal in the humid tropics. in northeastern costa rica, payments for environmental services (pes) and a government ban on deforestation have subsidized forest protection and reforestation in the san juan-la selva biological corridor (sjlsbc), resulting in a decline in mature forest loss and the expansion of tree plantations. we use field studies and graph models to assess how conservation effor ...201627755750
multilocus phylogeography of the wedge-billed woodcreeper glyphorynchus spirurus (aves, furnariidae) in lowland amazonia: widespread cryptic diversity and paraphyly reveal a complex diversification pattern.amazonian rivers function as important barriers to dispersal of amazonian birds. studying population genetics of lineages separated by rivers may help us to uncover the dynamics of biological diversification in the amazon. we reconstructed the phylogeography of the wedge-billed woodcreeper, glyphorynchus spirurus (furnariidae) in the amazon basin. sampling included 134 individuals from 63 sites distributed in eight amazonian areas of endemism separated by major amazonian rivers. nucleotide seque ...201323063588
modeling environmentally associated morphological and genetic variation in a rainforest bird, and its application to conservation better understand how environment shapes phenotypic and genetic variation, we explore the relationship between environmental variables across ecuador and genetic and morphological variation in the wedge-billed woodcreeper (glyphorynchus spirurus), a common neotropical rainforest bird species. generalized dissimilarity models show that variation in amplified fragment length polymorphism markers was strongly associated with environmental variables on both sides of the andes, but could also part ...201025567899
divergence with gene flow and fine-scale phylogeographical structure in the wedge-billed woodcreeper, glyphorynchus spirurus, a neotropical rainforest bird.determining the relative roles of vicariance and selection in restricting gene flow between populations is of central importance to the evolutionary process of population divergence and speciation. here we use molecular and morphological data to contrast the effect of isolation (by mountains and geographical distance) with that of ecological factors (altitudinal gradients) in promoting differentiation in the wedge-billed woodcreeper, glyphorynchus spirurus, a tropical forest bird, in ecuador. ta ...200919538341
historical relationships among neotropical lowland forest areas of endemism as determined by mitochondrial dna sequence variation within the wedge-billed woodcreeper (aves: dendrocolaptidae: glyphorynchus spirurus).studies of the distribution of south american taxa have identified several areas of endemism that may have contributed to the historical diversification of the region. we constructed a phylogeny of glyphorynchus spirurus (aves: dendrocolaptidae) populations using mtdna sequence data from portions of cytochrome b, nadh dehydrogenase subunit ii (nd2), and complete nadh dehydrogenase subunit iii (nd3). using this phylogeny we evaluate five previous hypotheses of area-relationships, two based on phy ...200212128035
diurnal variation in corticosterone release among wild tropical forest birds.glucocorticoids are adrenal steroid hormones essential to homeostatic maintenance. their daily variation at low concentrations regulates physiology and behavior to sustain proper immunological and metabolic function. glucocorticoids rise well above these baseline levels during stress to elicit emergency-state responses that increase short-term survival. despite this essence in managing life processes under both regular and adverse conditions, relationships of glucocorticoid release to environmen ...201627152116
chromosome painting in glyphorynchus spirurus (vieillot, 1819) detects a new fission in passeriformes.glyphorynchus spirurus (gsp), also called the wedge-billed woodcreeper (furnariidae) has an extensive distribution in the americas, including the atlantic coast of brazil. nevertheless, there is no information about its karyotype or genome organization. to contribute to the knowledge of chromosomal evolution in passeriformes we analysed the karyotype of glyphorynchus spirurus by classic and molecular cytogenetics methods. we show that glyphorynchus spirurus has a 2n = 80 karyotype with a fundame ...201830138388
habitat fragmentation differentially shapes neutral and immune gene variation in a tropical bird species.habitat fragmentation is a major cause of biodiversity loss, responsible for an alteration of intraspecific patterns of neutral genetic diversity and structure. although neutral genetic variation can be informative for demographic inferences, it may be a poor predictor of adaptive genetic diversity and thus of the consequences of habitat fragmentation on selective evolutionary processes. in this context, we contrasted patterns of genetic diversity and structure of neutral loci (microsatellites) ...202032934360
Displaying items 1 - 8 of 8