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.
Science for Detection, Containment, and Control of Invasive Species
USGS scientists focus on the development of innovative prevention, prediction, early detection, containment, and control tools.
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WARC ScienceNews
Friday's Findings - September 10 2021
Thresholds and Consequences of Ecophysiological Water Use in Forested Wetlands of the Southeast with Salinity: Why We Study Trees
Date: September 10, 2021 from 2-2:30 p.m. eastern time
Speakers: Ken Krauss, Research Ecologist, USGS Wetland and Aquatic Research Center; Jamie Duberstein, Research Professor, Clemson University;...
Photo Roundup - July-August 2021
A selection of coastal and ocean images and videos from across the USGS
Assessing Contaminants at Virgin Islands National Park and the Coral Reef National Monument
The U.S. Virgin Islands attracts more than two million people each year, most of whom are eager to explore the white sandy beaches and tropical marine ecosystems, including coral reefs.
Publications
A protocol for modelling generalised biological responses using latent variables in structural equation models
In this paper we consider the problem of how to quantitatively characterize the degree to which a study object exhibits a generalized response. By generalized response, we mean a multivariate response where numerous individual properties change in concerted fashion due to some internal integration. In latent variable structural equation modeling (...
Akomolafe, Gbenga; Grace, James; Steiner, Magdalena Instrumental variable methods in structural equation models
Instrumental variable regression (RegIV) provides a means for detecting and correcting parameter bias in causal models. Widely used in economics, recently several papers have highlighted its potential utility for ecological applications. Little attention has thus far been paid to the fact that IV methods can also be implemented within structural...
Morrissey, Michael; Grace, James Extreme precipitation and flooding contribute to sudden vegetation dieback in a coastal salt marsh
Climate extremes are becoming more frequent with global climate change and have the potential to cause major ecological regime shifts. Along the northern Gulf of Mexico, a coastal wetland in Texas suffered sudden vegetation dieback following an extreme precipitation and flooding event associated with Hurricane Harvey in 2017. Historical salt marsh...
Stagg, Camille; Osland, Michael; Moon, Jena A.; Feher, Laura; Laurenzano, Claudia; Lane, Tiffany C.; Jones, William; Hartley, Stephen