A5026463108- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Influenza Virus Research Studies
- Coastal wetland ecosystem dynamics
- Fish Ecology and Management Studies
- Animal Disease Management and Epidemiology
- Marine animal studies overview
- Viral Infections and Vectors
- Marine and coastal plant biology
- Marine and fisheries research
- Species Distribution and Climate Change
- Wildlife-Road Interactions and Conservation
- Rangeland and Wildlife Management
- Isotope Analysis in Ecology
- Mercury impact and mitigation studies
- Animal Behavior and Reproduction
- Coastal and Marine Dynamics
- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- COVID-19 epidemiological studies
- Animal Nutrition and Physiology
- Bird parasitology and diseases
- Animal Vocal Communication and Behavior
- Zoonotic diseases and public health
- Climate variability and models
Western Ecological Research Center
2014-2025
United States Geological Survey
2016-2025
University of Oklahoma
2023-2025
NASA Research Park
2023
Port and Airport Research Institute
2021
National Audubon Society
2014-2020
University of Maryland, College Park
2020
Audubon Nature Institute
2016-2017
San Diego State University
2017
United States Fish and Wildlife Service
1992-2013
A comprehensive field and modeling study indicates vulnerability of tidal wetlands to sea-level rise on the U.S. Pacific coast.
Significance Highly pathogenic avian influenza virus H5N1 first emerged in Asia and subsequently unfolded into the panzootic, causing major economic losses poultry sector. However, we still do not understand regional long-distance transmission seasonal patterns of H5N1. In this study, addressed issue by combining outbreak records, whole-genome sequences viral samples, satellite tracking data for four species migratory birds Asia. We show that timing outbreaks migration are closely associated...
Geese need to hug the land fly high Animal migrations provide numerous examples of astonishing feats. Impressive even among these is migration bar-headed geese across Himalayan Mountains, which reach heights thousands meters. Bishop et al. remotely monitored birds' heart rates, movement, and body temperature during migration. The “hug” landforms, taking advantage drafting wind patterns. This unexpected strategy conserves energy, though it means repeatedly lose, must then regain, altitude....
Summary 1. Migratory birds are major candidates for long‐distance dispersal of zoonotic pathogens. In recent years, wildfowl have been suspected contributing to the rapid geographic spread highly pathogenic avian influenza (HPAI) H5N1 virus. Experimental infection studies reveal that some wild ducks, geese and swans shed this virus asymptomatically hence potential it as they move. 2. We evaluate dispersive HPAI viruses by through an analysis movement range rate monitored satellite telemetry...
Poyang Lake is situated within the East Asian Flyway, a migratory corridor for waterfowl that also encompasses Guangdong Province, China, epicenter of highly pathogenic avian influenza (HPAI) H5N1. The lake largest freshwater body in China and significant congregation site waterfowl; however, surrounding rice fields poultry grazing have created an overlap with wild waterbirds, situation conducive to transmission. Reports HPAI H5N1 healthy ducks at raised concerns about potential resilient...
Birds that fly over mountain barriers must be capable of meeting the increased energetic cost climbing in low-density air, even though less oxygen may available to support their metabolism. This challenge is magnified by reduction maximum sustained rates large birds. Bar-headed geese ( Anser indicus ) make one highest and most iconic transmountain migrations world. We show those populations winter at sea level India are passing Himalayas 1 d, typically between 4,000 6,000 m 7–8 h....
Understanding how environmental conditions, especially wind, influence birds' flight speeds is a prerequisite for understanding many important aspects of bird flight, including optimal migration strategies, navigation, and compensation wind drift. Recent developments in tracking technology the increased availability data on large-scale weather patterns have made it possible to use path annotation link location animals conditions such as speed direction. However, there are various measures...
Background Qinghai Lake in central China has been at the center of debate on whether wild birds play a role circulation highly pathogenic avian influenza virus H5N1. In 2005, an unprecedented epizootic killed more than 6000 migratory including over 3000 bar-headed geese (Anser indicus). H5N1 subsequently spread to Europe and Africa, following years re-emerged along Central Asia flyway several times. Methodology/Principal Findings To better understand potential involvement H5N1, we studied...
We used satellite transmitters to track the 2000–2003 spring migrations of adult female Northern Pintails (Anas acuta L., 1758) from California's Central Valley, USA. PTT-tagged departed during late February mid-March, and 77%–87% stopped first in region south-central Oregon, extreme northwestern Nevada, northeastern California (SONEC). Subsequently, most migration strategies characterized by length stay SONEC subsequent destinations: (i) extended SONEC, migrated April early May directly...
Abstract Despite a large body of research concerning mercury (Hg) in birds, no single tissue has been used consistently to assess Hg exposure, and this hampered comparisons across studies. We evaluated the relationships concentrations among tissues four species waterbirds (American avocets [ Recurvirostra americana ], black‐necked stilts Himantopus mexicanus Caspian terns Hydroprogne caspia ; formerly Sterna Forster's forsteri ]) three life stages (prebreeding adults, breeding chicks) San...
The potential existence of a wild bird reservoir for highly pathogenic avian influenza (HPAI) has been recently questioned by the spread and persisting circulation H5N1 HPAI viruses, responsible concurrent outbreaks in migratory domestic birds over Asia, Europe, Africa. During large-scale surveillance programme Eastern Middle East, Africa, we detected viruses H5N2 subtype with (HP) viral genotype healthy two waterfowl species sampled Nigeria. We monitored survival regional movements one...
Highly pathogenic avian influenza (HPAI) H5N1 virus persists in Asia, posing a threat to poultry, wild birds, and humans. Previous work Southeast Asia demonstrated that HPAI risk is related domestic ducks people. Other studies discussed the role of migratory birds long distance spread H5N1. However, interplay between local persistence long-distance dispersal has never been studied. We expand previous geospatial analysis include South integrate with migration data satellite-tracked waterfowl...
Bar-headed geese are renowned for migratory flights at extremely high altitudes over the world's tallest mountains, Himalayas, where partial pressure of oxygen is dramatically reduced while flight costs, in terms rate consumption, greatly increased. Such a mismatch paradoxical, and it not clear why might fly higher than absolutely necessary. In addition, direct empirical measurements high-altitude lacking. We test whether migrating bar-headed actually minimize altitude make use favourable...
Identifying movement routes and stopover sites is necessary for developing effective management conservation strategies migratory animals. In the case of birds, a collection migration routes, known as flyway, often hundreds to thousands kilometers long can extend across political boundaries. Flyways encompass entire geographic range between breeding non-breeding areas population, species, or group they provide spatial frameworks international borders. Existing flyway maps are largely...
A unique pattern of highly pathogenic avian influenza (HPAI) H5N1 outbreaks has emerged along the Central Asia Flyway, where infection wild birds been reported with steady frequency since 2005. We assessed potential for two hosts HPAI H5N1, bar-headed goose (Anser indicus) and ruddy shelduck (Tadorna tadorna), to act as agents virus dispersal this 'thoroughfare'. used an eco-virological approach compare migration 141 marked GPS satellite transmitters during 2005–2010 with: 1) spatio-temporal...
Abstract Studies of pathogen transmission typically overlook that wildlife hosts can include both migrant and resident populations when attempting to model circulation. Through the application stable isotopes in flight feathers, we estimated migration strategy mallards ( A nas platyrhynchos ) occurring on C alifornia wintering grounds. Our study demonstrates mallards‐ a principal host avian influenza virus AIV nature, contribute differently gene flow depending strategy. No difference...
Casazza, M. L., C. T. Overton, T.-V. D. Bui, J. Hull, Albertson, V. K. Bloom, S. Bobzien, McBroom, Latta, P. Olofson, Rohmer, Schwarzbach, R. Strong, E. Grijalva, Wood, Skalos, and Takekawa. 2016. Endangered species management ecosystem restoration: finding the common ground. Ecology Society 21(1):19.http://dx.doi.org/10.5751/ES-08134-210119
Habitat loss can trigger migration network collapse by isolating migratory bird breeding grounds from nonbreeding grounds. Theoretically, habitat have vastly different impacts depending on the site's importance within corridor. However, migration-network connectivity and of site are not completely understood. We used GPS tracking data 4 species in Asian flyways to construct networks proposed a framework for assessing species. node-removal process identify stopover sites with highest impact...
-We captured 575 Xantus' Murrelets (Synthliboramphus hypoleucus) with spotlights and dip nets at 3 islands in the Southern California Channel Islands during April May of 1995-1997. Working night (2100-0500 h), 3-person teams inflatable boats located murrelets a spotlight them from waters near known breeding colonies Santa Barbara, Anacapa, San Clemente Islands. Our average capture rate was 4.7 hr'1, but we up to 12.3 hr. We recaptured 34 or 6% total. recommend this simple, inexpensive, safe...
We examined habitat preferences of 106 radio-marked Western Sandpipers (Calidris mauri) in the San Francisco Bay estuary during winter and spring at two scales: comparing proportions habitats their home range with available study area (second-order selection), radio locations different availability (third-order selection). Daily seasonal differed significantly as changed temporally. Under second-order selection, preferred tidal sloughs mud flats on low tides, salt-pond levees high tides....