A5052851911- Genetic diversity and population structure
- Evolution and Paleontology Studies
- Paleontology and Evolutionary Biology
- Paleontology and Stratigraphy of Fossils
- Species Distribution and Climate Change
- Genomics and Phylogenetic Studies
- Inflammatory Bowel Disease
- Plant and animal studies
- Avian ecology and behavior
- Microscopic Colitis
- Pacific and Southeast Asian Studies
- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Ecology and Vegetation Dynamics Studies
- Morphological variations and asymmetry
- Plant Diversity and Evolution
- Plant and Fungal Species Descriptions
- Isotope Analysis in Ecology
- Geology and Paleoclimatology Research
- Eosinophilic Esophagitis
- Adolescent and Pediatric Healthcare
- Hydrology and Sediment Transport Processes
- Education, Healthcare and Sociology Research
- Animal Vocal Communication and Behavior
- Helicobacter pylori-related gastroenterology studies
University of New Mexico
2016-2025
Norte Maar
2023
New Mexico Museum of Natural History and Science
2023
University of Chicago
2018-2021
University of Kansas
2009-2020
Biodiversity Research Institute
2020
American Museum of Natural History
2014-2017
Cornell University
2007
Avian diversification has been influenced by global climate change, plate tectonic movements, and mass extinction events. However, the impact of these factors on hyperdiverse perching birds (passerines) is unclear because family level relationships are unresolved timing splitting events among lineages uncertain. We analyzed DNA data from 4,060 nuclear loci 137 passerine families using concatenation coalescent approaches to infer a comprehensive phylogenetic hypothesis that clarifies all...
Abstract Songbirds (oscine passerines) are the most species-rich and cosmopolitan bird group, comprising almost half of global avian diversity. originated in Australia, but evolutionary trajectory from a single species an isolated continent to worldwide proliferation is poorly understood. Here, we combine first comprehensive genome-scale DNA sequence data set for songbirds, fossil-based time calibrations, geologically informed biogeographic reconstructions provide well-supported hypothesis...
The avian family Timaliidae is a species rich and morphologically diverse component of African Asian tropical forests. morphological diversity within the has attracted interest from ecologists evolutionary biologists, but systematists have long suspected that this might also mislead taxonomy, recent molecular phylogenetic work supported hypothesis. We produced analyzed data set 6 genes almost 300 individuals to assess history family. Although analysis required extensive adjustment program...
Natural history museums are vital repositories of specimens, samples and data that inform about the natural world; this Formal Comment revisits a Perspective advocated for adoption compassionate collection practices, querying whether it will ever be possible to completely do away with whole animal specimen collection.
Todiramphus chloris is the most widely distributed of Pacific's 'great speciators'. Its 50 subspecies constitute a species complex that over 16 000 km from Red Sea to Polynesia. We present, our knowledge, first comprehensive molecular phylogeny this enigmatic radiation kingfishers. Ten Pacific are embedded within T. complex, rendering it paraphyletic. Among these five remote islands Eastern Polynesian, as well widespread migratory taxon, sanctus. Our results offer strong support Todiramphus,...
Abstract The complex island archipelagoes of Wallacea and Melanesia have provided empirical data behind integral theories in evolutionary biology, including allopatric speciation biogeography. Yet, questions regarding the relative impact layered biogeographic barriers, such as deep-water trenches isolated systems, on faunal diversification remain underexplored. One barrier is Wallace’s Line, a significant boundary that largely separates Australian Asian biodiversity. To assess roles...
Abstract Dry forest bird communities in South America are often fragmented by intervening mountains and rainforests, generating high local endemism. The historical assembly of dry likely results from dynamic processes linked to numerous population histories among codistributed species. Nevertheless, species may diversify the same way through time if landscape environmental features, or ecologies, similarly structure populations. Here we tested whether six co‐distributed taxon pairs that...
Abstract Aim Kingfishers are the most species‐rich family in avian order, Coraciiformes. Their modern distribution is largely pantropical; however, global species diversity unevenly distributed. For example, 19 of 114 kingfisher occur New Guinea, whereas only six entire World. This disparity suggests regions with high richness could represent ancestral range family. Furthermore, some clades kingfishers ( Ceyx , Todiramphus ) thought to be product rapid insular radiations. Here, we...
With more than 70 described subspecies distributed from Java to Fiji, the Golden Whistler species complex (Aves: Pachycephala pectoralis/melanura) is world's most geographically variable bird species. We sequenced ten genes totalling 5743 bp 202 individuals and 32 nominal subspecies, mostly Australasian Polynesian lineages. used concatenated maximum likelihood Bayesian inference, as well coalescent tree analysis, reconstruct a phylogeny. The resulting phylogeny densely sampled robust...
Abstract The resolution of the Tree Life has accelerated with advances in DNA sequencing technology. To achieve dense taxon sampling, it is often necessary to obtain from historical museum specimens supplement modern genetic samples. However, material generally degraded, which presents various challenges. In this study, we evaluated how coverage at variant sites and missing data among samples impacts phylogenomic inference. We explored these patterns brush-tongued parrots (lories lorikeets)...
Abstract Hybridization, introgression, and reciprocal gene flow during speciation, specifically the generation of mitonuclear discordance, are increasingly observed as parts speciation process. Genomic approaches provide insight into where, when, how adaptation operates after can measure historical modern introgression. Whether adaptive or neutral in origin, hybridization cause discordance by placing mitochondrial genome one species (or population) nuclear background another species. The...
Abstract Many organisms possess multiple discrete genomes (i.e. nuclear and organellar), which are inherited separately may have unique even conflicting evolutionary histories. Phylogenetic reconstructions from these can yield different patterns of relatedness, a phenomenon known as cytonuclear discordance. In many animals, mitonuclear discordance discordant histories between the mitochondrial genomes) has been widely documented, but its causes often considered idiosyncratic inscrutable. We...
The exponential growth of molecular sequence data over the past decade has enabled construction numerous clade-specific phylogenies encompassing hundreds or thousands taxa. These independent studies often include overlapping data, presenting a unique opportunity to build macrophylogenies (phylogenies sampling > 1,000 taxa) for entire classes across Tree Life. However, inference large trees remains constrained by logistical, computational, and methodological challenges. Avian Life provides...
Islands have long represented natural laboratories for studying many aspects of ecology and evolutionary biology, from speciation to community assembly. One aspect that has been well documented is the correlation between island size taxonomic diversity, likely due decreased complexity population on small islands. This same logic can apply genetic which should predictably decrease with effective size. The size-diversity received support over years but often focuses single metrics diversity....
To assess faecal calprotectin [Fcal] levels before and after therapeutic de-escalation, to predict clinical relapse in patients with inflammatory bowel disease [IBD].From a prospectively maintained database, we enrolled 160 IBD [112 Crohn's disease/48 ulcerative colitis] remission, Fcal measured within 8 weeks de-escalation. Clinical was defined using the Harvey-Bradshaw index or Simple Colitis Activity Index.Using receiver operating characteristic [ROC] curve, >100 µg/g best threshold...
Abstract Animals must balance various costs and benefits when deciding to breed. The of breeding at different times have received much attention, but most studies been limited investigating short‐term season‐to‐season fitness effects. However, early, versus late, in a season may influence lifetime over many years, trading off complex ways across the breeder’s lifespan. In this study, we examined complete life histories 867 female tree swallows ( Tachycineta bicolor ) Ithaca, New York,...
We reconstructed the phylogeographic relationships of Variable Dwarf-Kingfisher (Ceyx lepidus) using DNA sequence data. Maximum likelihood and Bayesian analysis methods were used to reconstruct trees from a multilocus data set all 15 named subspecies Ceyx lepidus species complex. The concatenated data-set length was 2,471 base pairs included two mitochondrial genes noncoding nuclear introns. Support for monophyly C. equivocal. instead found support clade including plus endemic Philippine...
The evolution of pantropically distributed clades has puzzled palaeo- and neontologists for decades regarding the different hypotheses about where they originated. In this study, we explored how a pantropical distribution arose in diverse clade with rich fossil history: avian order Coraciiformes. This group played central role debate biogeographical history Neoaves. However, lacked coherent species tree to inform study its evolutionary dynamics. Here, present first complete Coraciiformes,...
As a dispersive lineage expands its distribution across heterogeneous landscape, it leaves behind allopatric populations with varying degrees of geographic isolation that often differentiate rapidly. In the case oceanic islands, even narrowly separated differentiate, which seems contrary to highly nature founding lineage. This pattern lineages differentiating narrow sea barriers has perplexed biologists for more than century. We used two reduced-representation genomic datasets examine...
Abstract Tropical mountains feature marked species turnover along elevational gradients and across complex topography, resulting in great concentrations of avian biodiversity. In these landscapes, particularly among morphologically conserved difficult to observe groups, limits still require clarification. One such lineage is Scytalopus tapaculos, which are the most birds. Attention their distinctive vocal repertoires phylogenetic relationships has resulted a proliferation newly identified...