Wetland and Aquatic Research Center
Bigger May Not Be Better When It Comes to Mississippi River Diversions
New WARC-led research shows large-scale river diversions may change water quality in estuaries, affecting economically important shellfish and fishesLearn more
Rainfall & Temperature Changes Expected to Transform Coastal Wetlands
New study finds changes in rainfall and temperature are predicted to transform wetlands in the Gulf of Mexico and around the world within the century.Read more
USGS and NASA Find Widespread Coastal Land Losses from Gulf Oil Spill
Dramatic, widespread shoreline loss along Louisiana’s coast caused by the 2010 BP Deepwater Horizon oil spill has been revealed by a new study.Learn more
WARC conducts relevant and objective research, develops new approaches and technologies, and disseminates scientific information needed to understand, manage, conserve, and restore wetlands and other aquatic and coastal ecosystems and their associated plant and animal communities throughout the nation and the world.
The WARC Strategic Science Plan demonstrates the alignment of the WARC goals with the USGS mission areas, associated programs, and other DOI initiatives.Learn More
Have you seen me? Report sightings of non-native and invasive aquatic plant and animal species to the Nonindigenous Aquatic Species (NAS) information resource.Report Sightings
Coastal Louisiana wetlands make up the seventh largest delta on Earth and support the largest commercial fishery in the lower 48 states. However, Louisiana currently undergoes ~90% of the total coastal wetland loss in the continental U.S.Learn more
The Fish Slam event discovered two nonnative fish species never seen before in Big Cypress National Preserve.
New research shows how river diversions may change water quality in estuaries.
Changes in rainfall and temperature are predicted to transform wetlands in the Gulf of Mexico and around the world within the century, a new study from the USGS and the University of Texas Rio Grande Valley concludes.
Expert elicitation, uncertainty, and the value of information in controlling invasive species
We illustrate the utility of expert elicitation, explicit recognition of uncertainty, and the value of information for directing management and research efforts for invasive species, using tegu lizards (Salvator merianae) in southern Florida as a case study. We posited a post-birth pulse, matrix model in which four age classes of tegus are recognized: hatchlings, 1 year-old, 2 year-olds, and 3 +...
Relationships between salinity and short-term soil carbon accumulation rates form marsh types across a landscape in the Mississippi River Delta
Salinity alterations will likely change the plant and environmental characteristics in coastal marshes thereby influencing soil carbon accumulation rates. Coastal Louisiana marshes have been historically classified as fresh, intermediate, brackish, or saline based on resident plant community and position along a salinity gradient. Short-term total carbon accumulation rates were assessed by...
Structured decision making as a conservation tool for recovery planning of two endangered salamanders
At least one-third of all amphibian species face the threat of extinction, and current amphibian extinction rates are four orders of magnitude greater than background rates. Preventing extirpation often requires both ex situ (i.e., conservation breeding programs) and in situ strategies (i.e., protecting natural habitats). Flatwoods salamanders (Ambystoma bishopi and A. cingulatum) are protected...