A5048514589- Wildlife Ecology and Conservation
- Species Distribution and Climate Change
- Animal Ecology and Behavior Studies
- Wildlife-Road Interactions and Conservation
- Ecology and biodiversity studies
- Marine animal studies overview
- Animal Behavior and Welfare Studies
- Fish Ecology and Management Studies
- Ecology and Vegetation Dynamics Studies
- Remote Sensing and LiDAR Applications
- Arctic and Antarctic ice dynamics
- Bat Biology and Ecology Studies
- Genetic and phenotypic traits in livestock
- Human-Animal Interaction Studies
- Forest Management and Policy
- Rangeland Management and Livestock Ecology
- Avian ecology and behavior
- Rangeland and Wildlife Management
- Fire effects on ecosystems
- Atmospheric and Environmental Gas Dynamics
- Robotics and Sensor-Based Localization
- Satellite Image Processing and Photogrammetry
University of Illinois Urbana-Champaign
2023-2025
Illinois Department of Natural Resources
2025
State University of New York
2020-2024
SUNY College of Environmental Science and Forestry
2020-2024
York University
2021-2024
Illinois Archaeological Survey
2024
Universidade Federal de Uberlândia
2024
California Department of Fish and Wildlife
2024
University of California, Davis
2024
Forschungsverbund Berlin
2024
COVID-19 lockdowns in early 2020 reduced human mobility, providing an opportunity to disentangle its effects on animals from those of landscape modifications. Using GPS data, we compared movements and road avoidance 2300 terrestrial mammals (43 species) during the same period 2019. Individual responses were variable with no change average or behavior, likely due lockdown conditions. However, under strict 10-day 95th percentile displacements increased by 73%, suggesting permeability. Animals'...
ABSTRACT Motivation SNAPSHOT USA is an annual, multicontributor camera trap survey of mammals across the United States. The growing dataset intended for tracking spatial and temporal responses mammal populations to changes in land use, cover climate. These data will be useful exploring drivers relative abundance distribution, as well impacts species interactions on daily activity patterns. Main Types Variables Contained 2019–2023 contains 987,979 records image sequence 9694 deployment...
Abstract Protected areas may be important refuges for large carnivores, but many are not enough to sustain viable populations. Without sufficient dispersal between protected areas, carnivore populations inside them at risk of becoming genetically isolated and demographically vulnerable. In this study, we use the jaguar population in around Emas National Park Brazilian Cerrado as a case study evaluate demographic sustainability within small potentially area. We used camera trapping data...
Within optimality theory, an animal's home range can be considered a fitness-driven attempt to obtain resources for survival and reproduction while minimizing costs. We assessed whether brown bears (Ursus arctos) in two island populations maximized resource patches within ranges (Resource Dispersion Hypothesis [RDH]) or occupied only areas necessary meet their biological requirements (Temporal Resource Variability [TRVH]) at annual seasonal scales. further examined how intrinsic factors...
Understanding the types and magnitude of human-caused mortality is essential for maintaining viable large carnivore populations. We used a database cause-specific to examine how hunting regulations landscape configurations influenced North American gray wolves (Canis lupus). Our dataset included 21 studies that monitored fates 3564 reported 1442 mortalities. Human-caused accounted 61% overall, with 23% due illegal harvest, 16% legal 12% result management removal. The overall proportion...
Abstract Prey must balance resource acquisition with predator avoidance for survival and reproduction. To reduce risk of predation, prey may avoid areas high use, but if they are unable to due requirements, instead change their habitat use or movement speed mitigate predation risk. response depend on spatially temporally varying forage availability as well seasonal variation in vulnerability alternate foods predators. quantify how respond spatial temporal brown bear we examined Roosevelt elk...
Abstract Within optimal foraging theory animals should maximize their net energy gain while minimizing energetic costs. Energetic expenditure in wild is therefore key to measure proxies of fitness. Accelerometers are an effective tool study animal movement-based energetics, but retrieval the device usually required and often difficult. movement across three axes ( x , y z ) can be calibrated measures oxygen consumption from captive animals, providing estimates overall expenditure. Measuring...
Climate change is altering the predictability of timing resource pulses and how consumers interact with them, resulting in phenomena placed under trophic mismatch hypothesis (TMH). This occurs when a consumer fails to overlap capitalize on availability key food pulse. Such changes predator-prey interactions can alter nutrient transfer, destabilize webs, reduce species reproduction survival. Brown bears (Ursus arctos) Kodiak Archipelago, Alaska, USA, have purportedly altered their foraging...
Abstract Context The forestry industry provides important goods, services and economic benefits, but timber harvest can adversely impact ecosystem services, including wildlife habitat. Timber planning integrate habitat quality through multi-objective optimization for suitability. Objectives Our objective was to develop a method find optimal solutions suitability individually concurrently, then apply the Roosevelt elk ( Cervus elaphus roosevelti ) on Afognak Island, Alaska. Methods We...
Ungulates are key components of ecosystems due to their effects on lower trophic levels, role as prey, and value for recreational subsistence harvests. Understanding factors that drive ungulate population dynamics can inform protection important habitat successful management populations. To ascertain correlates dynamics, we evaluated the five non-exclusive hypotheses abundance recruitment: winter severity, spring nutritional limitation (spring bottleneck), summer-autumn maternal condition...
<title>Abstract</title> The jaguar (<italic>Panthera onca</italic>) is endangered along all its geographical distribution, including Brazil. Assessments of population dynamics are scarce despite their relevance to efficiently design conservation measures and acknowledge the demographic health populations. This study uses camera trap data from 4 surveys spanning 8 years gain knowledge on in Emas National Park (ENP), one largest Conservation Units Brazilian Cerrado biome. ENP located within a...
not-yet-known unknown One of the most difficult challenges for wildlife managers is reliably estimating populations. Camera traps combined with spatial capture recapture (SCR) models are a popular tool population estimation. They have limitations, however, including long data processing times. Drones thermal imagery an emerging populations, but how they compare to other methods remain poorly studied. We compared use camera and SCR drone surveys densities Sitka black-tailed deer (Odocoileus...
Abstract Telemetry studies allow scientists to track animal movements and study species ecology without direct visual observation. Fitting telemetry devices requires physical or chemical capture restraint of animals. Ground darting is a commonly used technique cervids but locating animals dart finding individuals post induction remains challenge. Here we present an application using thermal imaging drones help locate, ground dart, monitor target ensure safe immobilization. We immobilized 10...
One of the most difficult challenges for wildlife managers is reliably estimating populations. Camera traps combined with spatial capture–recapture (SCR) models are a popular tool population estimation. They have limitations, however, including long data processing times. Drones thermal imagery an emerging populations, but how they compare to other methods remain poorly studied. We compared use camera and SCR drone surveys densities Sitka black‐tailed deer Odocoileus hemionus sitkensis on...
Abstract Protected areas that restrict human activities can enhance wildlife habitat quality. Efficacy of protected be improved with increased protection from illegal and presence buffer surround a core area. Habitat value also affected by seasonal variation in anthropogenic pressures. We examined space use African lions ( Panthera leo ) within area, Serengeti National Park, Tanzania, surrounding varying strengths. used lion locations logistic regression models during wet dry seasons to...
Abstract Within optimal foraging theory animals should maximize their net energy gain while minimizing energetic costs. Energetic expenditure in wild is therefore key to measure proxies of fitness. Accelerometers are an effective tool study animal movement-based energetics but retrieval the device usually required and often difficult. Measuring expenditures using a global positioning system (GPS) approach could provide alternative method ecology. We compared accelerometer GPS methods...
Abstract Within optimal foraging theory animals should maximize their net energy gain while minimizing energetic costs. Energetic expenditure in wild is therefore key to measure proxies of fitness. Accelerometers are an effective tool study animal movement-based energetics but retrieval the device usually required and often difficult. Measuring expenditures using a global positioning system (GPS) approach could provide alternative method ecology. We compared accelerometer GPS methods...
Abstract Within optimality theory, an animal’s home range can be considered a fitness-driven attempt to obtain resources for survival and reproduction while minimizing costs. We assessed whether brown bears ( Ursus arctos ) in two island populations maximized resource patches within ranges (Resource Dispersion Hypothesis [RDH]) or occupied only areas necessary meet their biological requirements (Temporal Resource Variability [TRVH]) at annual seasonal scales. further examined how intrinsic...