A5086437002- Species Distribution and Climate Change
- Amphibian and Reptile Biology
- Bat Biology and Ecology Studies
- Wildlife Ecology and Conservation
- Animal Vocal Communication and Behavior
- Ecology and biodiversity studies
- Marine and fisheries research
- Fish Ecology and Management Studies
- Turtle Biology and Conservation
- Animal Behavior and Reproduction
United States Geological Survey
2013-2025
Western Ecological Research Center
2013-2022
Urban expansion is a prominent threat to biodiversity, particularly for terrestrial mammals, which are significantly impacted by disruptions in habitat connectivity and loss. It can also lead increased human‑wildlife conflicts that contribute species decline. public works projects, such as flood control areas, may coincidentally preserve significant habitat, but their potential conservation remains understudied. Hansen Dam, located the city of Los Angeles, California, USA, one...
Abstract We conducted surveys for the Endangered Sierra Madre yellow-legged frog Rana muscosa throughout southern California to evaluate current distribution and status of species. Surveys were during 2000–2009 at 150 unique streams lakes within San Gabriel, Bernardino, Jacinto, Palomar mountains California. Only nine small, geographically isolated populations detected across four mountain ranges, all tested positive amphibian chytrid fungus Batrachochytrium dendrobatidis . Our data show...
Synergistic effects of habitat loss, drought, and climate change exacerbate amphibian declines. In southern California urbanization continues to convert natural habitat, while prolonged drought reduces surface water availability. Protection biodiversity may be provided through mitigation; however, the long-term effectiveness different strategies is often unreported. As a mitigation measure for building new development within occupied Spea hammondii (western spadefoot) in Orange County,...
Prolonged drought due to climate change has negatively impacted amphibians in southern California, U.S.A. Due the severity and length of current drought, agencies researchers had growing concern for persistence arroyo toad (Anaxyrus californicus), an endangered endemic amphibian this region. Range-wide surveys species not been conducted at least 20 years. In 2017-2020, we collaborative toads historical locations. We surveyed 88 115 total sites having records confirmed that is currently...
Conservation translocations, the human-mediated movement and release of a living organism for conservation benefit, are increasingly recommended in species’ recovery plans as technique mitigating population declines or augmenting genetic diversity. However, translocation protocols species with broad distributions may require regionally specific considerations to increase success, environmental gradients pose different constraints on establishment persistence parts range. Here we report...
Climate change and prolonged drought have negatively impacted amphibians in southern California, U.S.A. Due to the severe from 2012–2016, agencies researchers had growing concern for persistence of arroyo toad ( Anaxyrus californicus ), an endangered endemic amphibian this region. Range-wide surveys species not been conducted at least 20 years. In 2017–2020 we collaborative toads historical locations. We surveyed 87 115 total sites having records confirmed that is currently extant 60 19 25...