Wetland and Aquatic Research Center

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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.

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Have you seen me? Report sightings of non-native and invasive aquatic plant and animal species to the Nonindigenous Aquatic Species (NAS) information resource.

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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.

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News

Three non-native fish found in the Big Cypress
March 29, 2017

The Fish Slam event discovered two nonnative fish species never seen before in Big Cypress National Preserve.

 

 

The Caernarvon Freshwater Diversion structure, located at the head of Breton Sound Estuary, became operational in 1992.
February 8, 2017

New research shows how river diversions may change water quality in estuaries. 

Wading birds feed near wooden posts marking a research site in a Louisiana salt marsh
January 25, 2017

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.

Publications

Conservation genetics of American crocodile, Crocodylus acutus, populations in Pacific Costa Rica
Year Published: 2017

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
Year Published: 2017

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
Year Published: 2017

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...