A5014073311- Avian ecology and behavior
- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Wildlife Ecology and Conservation
- Isotope Analysis in Ecology
- Animal Behavior and Reproduction
- Plant and animal studies
- Animal Ecology and Behavior Studies
- Marine animal studies overview
- Physiological and biochemical adaptations
- Fish Ecology and Management Studies
- Bat Biology and Ecology Studies
- Energy and Environment Impacts
- Data Analysis with R
- Animal Vocal Communication and Behavior
- Impact of Light on Environment and Health
- COVID-19 epidemiological studies
- Fire effects on ecosystems
- Aeolian processes and effects
- Rangeland and Wildlife Management
- Marine Bivalve and Aquaculture Studies
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Morphological variations and asymmetry
- Geographies of human-animal interactions
University of Michigan
2024-2025
University of Colorado Denver
2020-2025
Yale University
2021-2024
Institute for Biodiversity
2024
Recent widespread reductions in body size across species have been linked to increasing temperatures; simultaneous increases wing length relative broadly observed but remain unexplained. Size and shape may change independently of one another, or these morphological shifts be linked, with mediating directly driving the degree which changes. Using hierarchical Bayesian models a time series 27 366 specimens from five North American migratory passerine bird species, we tested roles that climate...
Trade-offs between current and future reproduction manifest as a set of co-varying life history metabolic traits, collectively referred to 'pace life' (POL). Seasonal migration modulates environmental dynamics putatively affects POL, however, the mechanisms by which migratory behaviour shapes POL remain unclear. We explored how interacts with shape POL. Using an individual-based model movement metabolism, we compared fitness-optimized trade-offs among strategies. found annual experienced...
Species distribution models (SDMs) have become a common tool in studies of species–environment relationships but can be negatively affected by positional uncertainty underlying species occurrence data. Previous work has documented the effect on model predictive performance, its consequences for inference about remain largely unknown. Here we use over 12 000 combinations virtual and real environmental variables species, as well case study, to investigate how accurately SDMs recover after...
Movement is a key means by which animals cope with variable environments. As they move, construct individual niches composed of the environmental conditions experience. Niche axes may vary over time and covary one another as make tradeoffs between competing needs. Seasonal migration expected to produce substantial niche variation move keep pace major life history phases fluctuations in conditions. Here, we apply time-ordered principal component analysis examine dynamic variance covariance...
Abstract Organisms assess biotic and abiotic cues at multiple sites when deciding where to settle. However, due temporal constraints on this prospecting, the suitability of available habitat may be difficult for an individual are most reliable, or time they making settlement decisions. For migratory birds, postbreeding season optimal prospect inform decisions future breeding seasons. We investigated fall movements flammulated owls ( Psiloscops flammeolus ) within after fledglings had gained...
Determining patterns in annual movements of animals is an important component population ecology, particularly for migratory birds where migration timing and routes, wintering habitats have key bearing on dynamics. From 2009 to 2011, we used light-level geolocators document the Flammulated Owls (Psiloscops flammeolus). Four males departed from breeding areas Colorado fall between ≤5 21 October, arrived Mexico 11 October 3 November, ≤6 April, returned 15 May. Core three were located...
Abstract Over the past five decades, a large number of wild animals have been individually identified by various observation systems and/or temporary tracking methods, providing unparalleled insights into their lives over both time and space. However, so far there is no comprehensive record uniquely nor where data metadata are stored, for example photos, physiological genetic samples, disease screens, information on social relationships. Databases currently do not offer unique identifiers...
Physiological and behavioral processes interact with environmental conditions to strongly influence organismal life history strategies which covary latitude. However, few studies have articulated explicit linkages between metabolism across latitudinal gradients. Interactions resource dynamics may give rise not only patterns of variation in mean traits, but also the ranges (diversity) those traits same Here we show that range viable realized metabolic/life covaries amplitude seasonal...
Science provides a method to learn about the relationships between observed patterns and processes that generate them. However, inference can be confounded when an pattern cannot clearly wholly attributed hypothesized process. Over-reliance on traditional single-hypothesis methods (i.e. null hypothesis significance testing) has resulted in replication crises several disciplines, ecology exhibits features common these fields (e.g. low-power study designs, questionable research practices,...
Abstract Seasonal migration is a widespread phenomenon undertaken by myriad organisms, including birds. Competing hypotheses about ultimate drivers of seasonal in birds contrast relative resource abundances at high latitudes (“southern home hypothesis”) against avoidance winter scarcity (“dispersal‐migration hypothesis”). However, direct tests these competing have been rare and to date limited historical biogeographic reconstructions. Here we derive novel predictions the dynamics individual...
We document the first observed instance of polygyny in Flammulated Owls (Otus flammeolus) and among insectivorous raptors. Chronologies male's two nests, which were 510 m apart, separated by nearly 2 weeks. Each brood initially consisted three owlets, similar to mean size monogamous pairs. The male delivered considerably fewer prey secondary nest, compared with prey-delivery rates at nests males during nestling period. Evidence suggested that all owlets fledged from primary brood, but only...
Abstract Trade-offs between current and future reproduction manifest as a set of co-varying life history metabolic traits, collectively referred to “pace life” (POL). Seasonal migration modulates realized environmental dynamics putatively affects POL, however, the mechanisms by which migratory behavior shapes POL remain unclear. We explored how interacts with shape POL. Using an individual based model movement metabolism we compared fitness-optimized trade-offs among strategies. found annual...
Abstract Understanding the geographic distributions of animals is central to ecological inquiry and conservation planning. Movement-based habitat selection models, like discrete-time step-selection functions, are useful for identifying key environmental attributes which select upon can nearly perfectly capture preference patterns between conditions. However, predictions based only on often fail accurately describe true distributions. We show that by integrating local patterns, movement...
Abstract The niche is a key concept that unifies ecology and evolutionary biology. However, empirical theoretical treatments of the are mostly performed at species level, neglecting individuals as important units ecological processes. So far, formal mathematical link between individual-level niches higher organismal-level has been lacking, hampering unification theories more accurate forecasts biodiversity change. To fill in this gap, we propose bottom-up approach to derive population from...
Long-distance animal migration complicates our ability to understand population dynamics and conserve migratory species. Twice each year, billions of songbirds embark on physiologically demanding dangerous migrations, but we still know little about the rates or drivers mortality during because challenges associated with tracking small organisms. Here, implement new methods estimate survival directly from continent-wide automated telemetry data indirectly mark-recapture in two species...