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.
Conservation genetics of American crocodile, Crocodylus acutus, populations in Pacific Costa Rica
Maintaining genetic diversity is crucial for the survival and management of threatened and endangered species. In this study, we analyzed genetic diversity and population genetic structure at neutral loci in American crocodiles, Crocodylus acutus, from several areas (Parque Nacional Marino Las Baulas, Parque Nacional Santa Rosa, Parque Nacional Palo Verde, Rio Tarcoles, and Osa Conservation Area...
Demersal fish assemblages on seamounts and other rugged features in the northeastern Caribbean
Recent investigations of demersal fish communities in deep (>50 m) rugged habitats have considerably increased our knowledge of the factors that influence the assemblage structure of fishes across mesophotic to deep-sea depths. Although habitat types influence deepwater fish distribution, whether different rugged seafloor features provide functionally equivalent habitat for fishes is poorly...
Manatee grazing impacts on a mixed species seagrass bed
The endangered manatee Trichechus manatus is one of few large grazers in seagrass systems. To assess the long-term impacts of repeated grazing on seagrasses, we selected a study site within Kennedy Space Center in the northern Banana River, Brevard County, Florida, that was typically grazed by large numbers of manatees in spring. Two 13x13 m manatee exclosures and 2 paired open plots of equal...