Wetland and Aquatic Research Center


Environmental contaminants come from many human activities, including industry, energy production, agriculture, transportation, recreation, wastewater treatment, and urban horticulture. WARC researchers conduct risk assessments of contaminants, like heavy metals, methyl mercury, copper, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and organochlorine pesticides (such as DDT and DDE). Other contaminants of interest due to their impacts on wetland and aquatic ecosystems and species health include fragrances/musks, flame retardants, triclosan, personal-care products, and pharmaceuticals. WARC looks at the effects of these potentially damaging contaminants on wetland and aquatic plants and animals.
Filter Total Items: 12
Date published: July 31, 2018
Status: Active

Computer-Assisted Sperm Motion Analysis in Measuring Reproductive Effects in Bass

The objective of this research is to assess the sensitivity of female and male LMB reproductive capabilities at the time of year when they are physiologically preparing for spawning season (also known as gonad recrudescence).

Date published: April 3, 2018
Status: Active

Effect of Chronic Neonicotinoid Insecticide Exposure upon Monarch Development

The long-term viability of monarch (Danaus plexippus) butterfly populations in North America is in doubt.

Date published: February 7, 2018
Status: Active

Relative Sensitivity of Adult Mosquitoes and Butterflies to Adult Mosquito Control Pesticides

Mosquito control on Department of the Interior (DOI) managed lands is a resource management challenge. The pesticides used to control mosquitoes may also affect nontarget organisms whose conservation is one of the primary responsibilities of resource managers.

Date published: October 31, 2017
Status: Active

Detecting Differences in Bacterial Metabolism in the Buffalo National River

Each year, the Buffalo National River (BUFF) attracts 1.6 million visitors, many of whom enjoy recreational water activities. Since 2013, a confined animal feeding operation (CAFO) for swine has been operating on Big Creek, a BUFF tributary.

Date published: April 30, 2016

Amphibian Occupancy Modeling in the South-Central Amphibian Research and Monitoring Initiative (ARMI) Region

In response to growing public concerns about this loss of biodiversity, the U.S. Congress funded the Amphibian Research and Monitoring Initiative (ARMI), a national program coordinated by the U.S. Geological Survey.

Date published: April 26, 2016
Status: Active

Monarch Butterfly Utilization of Milkweed Plants Grown in Close Proximity to Corn Treated by a Neonicotinoid Insecticide (Seed Treatment)

Monarch butterfly populations have declined sufficiently to result in noticeably fewer overwintering at sites in central Mexico as in California.

Date published: April 18, 2016
Status: Completed

Baseline Aquatic Contamination and Endocrine Status in Resident Fish Populations of Biscayne National Park and in the Adjacent Coastal Environment

As part of the Comprehensive Everglades Restoration Plan, water managers are planning to use treated wastewater from the South District Wastewater Treatment Plant (WWTP) to supplement the canal waters that will be used to rehydrate wetlands adjacent to the Biscayne National Park (Park).

Date published: April 15, 2016

NRDA: Deepwater ROV Sampling to Assess Potential Impacts to Hardbottom Coral Communities and Associates from the Deepwater Horizon Oil Spill

The MC252 oil spill introduced hydrocarbons, dispersants, and drilling muds into the Gulf of Mexico, potentially adversely affecting the seafloor environment surrounding the spill site. 

Date published: March 17, 2016

Use of a Sustained-Release Chemical Delivery Device in Assessing Effects of Systemic Insecticides

Neonicotinoid insecticides the fastest growing insecticide worldwide - and may play a role in the declines of terrestrial and aquatic vertebrate species.

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: February 25, 2016
Status: Completed

Mosquito Control Pesticide Impacts to Butterflies: Implications for Imperiled Butterfly Conservation on a National Wildlife Refuge

USGS researchers evaluate the impact of a pesticide on two imperiled butterfly species in the Florida Keys.

Date published: February 25, 2016

Methylmercury Impacts to Reproduction in the Eastern Mosquitofish (Gambusia holbrooki)

USGS researchers investigate the effects of methylmercury contamination on reproduction of the Eastern mosquitofish, a common fish in South Florida.