A5058709791- Fish Ecology and Management Studies
- Hydrology and Watershed Management Studies
- Fish biology, ecology, and behavior
- Species Distribution and Climate Change
- Amphibian and Reptile Biology
- Crustacean biology and ecology
- Scientific Computing and Data Management
- Research Data Management Practices
- Insect and Pesticide Research
- Mosquito-borne diseases and control
- Wildlife Ecology and Conservation
- Hydrology and Sediment Transport Processes
- Environmental Toxicology and Ecotoxicology
- Insect and Arachnid Ecology and Behavior
- Soil erosion and sediment transport
- Plant and animal studies
- Ecosystem dynamics and resilience
- Problem and Project Based Learning
- Risk Perception and Management
- Pharmaceutical and Antibiotic Environmental Impacts
- Environmental Monitoring and Data Management
- Aquatic and Environmental Studies
- Ego Development and Educational Practices
- Ocean Acidification Effects and Responses
- Conservation, Biodiversity, and Resource Management
Pacific Northwest Research Station
2022-2023
Environmental Protection Agency
2016-2022
US Forest Service
2022
Oak Ridge Institute for Science and Education
2021
VA Office of Research and Development
2018
University of Georgia
2013-2015
Smithsonian Environmental Research Center
2007
Organization for Tropical Studies
2005
Woodwell Climate Research Center
2005
ABSTRACT: Land cover and land use change have long been known to influence the chemical, physical, biological characteristics of streams. This study makes maps derived from fine resolution satellite imagery an extensive stream quality dataset determine relationship between small watershed health rankings composition configuration. Landscape metrics were digital impervious surface area (ISA), tree (percent), agricultural crop within Montgomery County, Maryland. Watershed developed by state...
Abstract The importance of thermal refuges in a rapidly warming world is particularly evident for migratory species, where individuals encounter wide range conditions throughout their lives. In this study, we used spatially explicit, individual‐based simulation model to evaluate the buffering potential cold‐water anadromous salmon and trout ( Oncorhynchus spp.) migrating upstream through warm river corridor that can expose physiologically stressful temperatures. We considered migration...
The objective of the current study was to use a biomarker-based approach investigate influence atrazine exposure on American toad (Anaxyrus americanus) and grey tree frog (Hyla versicolor) tadpoles. Atrazine is one most frequently detected herbicides in environmental matrices throughout United States. In surface waters, it has been found at concentrations from 0.04-2859μg/L thus presents likely scenario for non-target species such as amphibians. Studies have examined effect metamorphic...
Summary In tropical streams, omnivorous shrimp may be important nutrient recyclers, because they have a lower body P demand than fish. However, little is known about the controls on recycling by freshwater shrimp. Across series of lowland streams that range in dissolved P, we describe: (i) stoichiometry relation to stream level; (ii) rates excretion shrimp; (iii) trophic level using natural stable isotope values (δ 15 N); and (iv) importance as recyclers. Shrimp elemental composition varied...
Diadromous fish populations face multiple challenges along their migratory routes. These include suboptimal water quality, harvest, and barriers to longitudinal lateral connectivity. Interactions among factors influencing migration success make it challenging assess management options for improving conditions riverine corridors. We describe a spatially explicit simulation model that integrates complex individual behaviors of fall-run Chinook Salmon (Oncorhynchus tshawytscha) summer-run...
Recent increases in the burn area and severity of wildfires western US have raised concerns about impact on stream water temperature–a key determinant cold-water fish habitats. However, effect seasonal temperatures concern, including winter summer, are not fully understood. In this study, we assessed wildfire burns at Boulder Creek (Oregon), Elk Gibbon River (Wyoming) watersheds downstream summer for first three post-fire years. To obtain results independent choice analytical method,...
Freshwater shrimps are an important biotic component of tropical ecosystems. However, they can have a low probability detection when abundances low. We sampled 3 the most common freshwater shrimp species, Macrobrachium olfersii, carcinus, and heterochirus, used occupancy modeling logistic regression models to improve our limited knowledge distribution these cryptic species by investigating both local- landscape-scale effects at La Selva Biological Station in Costa Rica. Local-scale factors...
Chemical exposure estimation through the dermal route is an underemphasized area of ecological risk assessment for terrestrial animals. Currently, there are efforts to create models estimate doses from this pathway use in assessment. One significant limitation has been insufficient published data characterize and support selection parameterization appropriate models, particularly amphibians habitats. Recent publications measuring pesticide terrestrial-phase have begun rectify situation. We...
Abstract: Freshwater migratory shrimps, an important component of tropical aquatic ecosystems, are vulnerable to land-use change during their upstream and downstream migrations. At La Selva Biological Station in the Sarapiquí region Costa Rica, shrimp population data were collected between 1988 1989, before massive occurred that could potentially affect recruitment upstream. Using generalized linear models a Bayesian inference framework, relative abundance Macrobrachium olfersi recent...