Wetland and Aquatic Research Center

Species Stressors

Research into the cause and mitigation of environmental and anthropogenic stressors that potentially impact the health and reproductive capacity of species of management concern. Current focal areas include conventional and unconventional energy development (oil, gas, wind, solar, hydroelectric), ecological flows, land use, and agriculture.
Filter Total Items: 35
Date published: July 23, 2021
Status: Active

Assessing Environmental Stress in Mature Mangrove Stands: Linkages to Nutrient Loading

WARC Researchers are comparing tree and root growth, soil CO2 flux, and surface elevation change between fertilized and unfertilized mangrove forests to assess the potential impact of increased nutrient loading and to help rate mangrove stand vulnerability.

Date published: September 18, 2020
Status: Active

Adapting to Climate Change: Trends and Severe Storm Responses by Migratory Landbirds and Their Habitats

USGS scientists will be analyzing weather surveillance radar observations of birds departing stopover habitats to measure responses to climate change.

Contacts: T.J. Zenzal, Ph.D., Dr. Jeff Buler, Randy Wilson
Date published: June 4, 2020
Status: Active

Interaction of Environmental Stressors and Batrachochytrium dendrobatidis (Bd) Pathogen Loads on Survival of Green Frogs (Lithobates clamitans)

The U.S. Geological Survey Amphibian Research Monitoring Initiative (ARMI) is using a combination of swabbing, non-lethal tissue sampling, soil and water sampling, and collection of a variety of other environmental variables to determine the relationships between the prevalence and pathogen load of Bd infection and environmental stressors on green treefrog survival.

Date published: May 28, 2020
Status: Active

Capture-Mark-Recapture of Treefrogs at Bayou Teche National Wildlife Refuge

WARC researchers are gathering amphibian data to better understand the impact of natural disasters on treefrog populations and examine post-event processes.

Date published: February 26, 2020
Status: Active

Impacts of coastal and watershed changes on upper estuaries: causes and implications of wetland ecosystem transitions along the US Atlantic and Gulf Coasts

Estuaries and their surrounding wetlands are coastal transition zones where freshwater rivers meet tidal seawater.  As sea levels rise, tidal forces move saltier water farther upstream, extending into freshwater wetland areas. Human changes to the surrounding landscape may amplify the effects of this tidal extension, impacting the resiliency and function of the upper estuarine wetlands. One...

Contacts: Ken Krauss, Ph.D., Gregory Noe, Camille LaFosse Stagg, Ph.D., Hongqing Wang, Ph.D., Eric J Ward, Ph.D., Jamie A. Duberstein, William H. Conner, Zhaohua Dai, Thomas L. O'Halloran
Date published: April 4, 2019
Status: Active

Health Effects and Behavioral Response of Florida Manatees (Trichechus manatus latirostris) to Persistent Algal Bloom and Associated Loss of Seagrass Resources in Brevard County, Florida

USGS researchers are working with partners to assess the health and foraging behavior of Florida manatees in the northern Indian River Lagoon and Banana River, areas that have experienced declining seagrasses due to an extended phytoplankton bloom. 

Date published: March 26, 2019
Status: Active

Population Ecology of Florida Manatees

USGS is working with partners to understand how the federally protected Florida manatee population changes over time and responds to threats.

Date published: March 5, 2019
Status: Active

Quantitative Framework to Model Risk of Collisions between Marine Wildlife and Boats

Collisons between wildlife and vehicles threaten many species, and can lead to human loss of life, injuries, and loss of property. USGS is developing models to help evaluate the effectiveness of wildlife protection zones and optimize the design of these protected areas. 

Date published: March 5, 2019
Status: Active

Adaptive Harvest Management of European Geese

Pink-footed geese in Svalbard are a highly valued resource, but their increasing population causes conflicts with agricultural needs. USGS is devloping population models to help inform management of optimal harvest strategies. 

Date published: February 27, 2019
Status: Active

Effects of Native and Non-native Fishes on Native Apple Snail Population Dynamics

The Florida apple snail is a critical component of the state's wetland food webs. USGS scientists assess the effects of native and non-native fishes on the native snail populations.

Contacts: Pamela J Schofield, Ph.D., Daniel Slone, Ph.D., Philip C. Darby, Ph.D., Silvia M. Gutierre, Ph.D.
Date published: June 18, 2018
Status: Active

Studying Immune Responses in the American Kestrel (Falco sparverius)

The objectives of this study are to (1) investigate whether the immune system will respond to chemical stressors, such as new flame retardant compounds, and (2) determine if such chemical stressors influence white blood cells (WBC) responses after exposure to a viral pathogen mimicking bird flu.

Date published: April 3, 2018
Status: Active

Effect of Chronic Neonicotinoid Insecticide Exposure upon Monarch Development

The long-term viability of monarch butterfly (Danaus plexippus) populations in North America is in doubt.