Wetland and Aquatic Research Center


Eutrophication occurs when a body of water receives an excessive nutrient load, particularly phosphorus and nitrogen. This often results in an overgrowth of algae. As the algae die and decompose, oxygen is depleted from the water, and this lack of oxygen in the water causes the death of aquatic animals, like fish.
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Date published: April 17, 2016

Watershed Controls of Freshwater Wetland Nutrient Stoichiometry and Sensitivity to Eutrophication

When it comes to freshwater wetlands, hydrology plays a large role in nutrient stoichiometry and sensitivity to nutrient inputs. Although wetland biogeochemists intuitively understand these important relationships between landscape position, hydrology, and sensitivity to nutrient inputs, these relationships have never been quantified using geospatial data. The objective of this project will be...

Date published: April 6, 2016

Surface Water Hydrology and Nitrate Dynamics in Delta Islands of Prograding Wax Lake Delta, Louisiana

The Wax Lake Delta is an ideal ecosystem to study the effects of a large-scale river diversion on the biogeochemistry of coastal wetlands, and the capacity of these wetlands to assimilate nutrients delivered by these diversions. USGS works to develop a better understanding of surface water hydrology and nitrate dynamics in this area. 

Date published: March 10, 2016
Status: Active

Contaminants Assessments in the Coral Reefs of the Virgin Islands National Park and Virgin Islands Coral Reef National Monument

Coral reefs around the world are exposed to a number of environmental contaminants. USGS researchers investigate the issue of contamination on the reefs around the U.S. Virgin Islands.

Date published: April 17, 2009

Integrative Studies of Florida Spring Ecosystems

Florida's springs are a source of cultural, recreational, and ecological importance. But land-use changes and increased demands for groundwater due to the state's growing population have led to widespread impairment of these unique ecosystems.