Wetland and Aquatic Research Center
Invasive Cuban Treefrogs Establish First Known Population in Louisiana
A population of the invasive treefrogs has been discovered in New Orleans, more than 430 miles from the nearest known population in Florida.Read more
New Genetic Test Detects Manatees' Recent Presence in Waterways
WARC scientists have developed the first lab test that can pick up traces of manatees' genetic material in fresh or saltwaterLearn 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.
Wade into USGS WARC's wetland and aquatic science!Learn More
Sea turtles, pythons, & manatees, oh my: USGS science in FloridaLearn more
A population of exotic invasive Cuban treefrogs has been discovered in New Orleans, more than 430 miles (700 kilometers) from the nearest known population in Florida, making this the first known breeding population in the mainland United States outside that state, reports a new study by the U.S. Geological Survey.
Scroll down to hear and download calls of Cuban treefrogs and two native treefrogs.
Hurricanes Harvey, Irma, Maria, and Nate may have spread non-native freshwater plants and animals into new water bodies, where some of them can disrupt living communities or change the landscape.
Environmental DNA picks up traces of the elusive mammals’ saliva, skin, waste, or exhaled breaths.
Spatial distribution and ecological risk assessment of heavy metals in coastal surface sediments in the Hebei Province offshore area, Bohai Sea, China
Seven hundred and nine surface sediment samples, along with deeper sediment samples, were collected from Hebei Province along the coastal section of the Bohai Sea, China, and analyzed for grain size, concentrations of organic carbon (Corg) and heavy metals (Cu, Pb, Zn, Cr, Cd, As, and Hg). Results indicated that the average concentrations in the...Ding, Xigui; Ye, Siyuan; Yuan, Hongming; Krauss, Ken W.
A parasitism-mutualism-predation model consisting of crows, cuckoos and cats with stage-structure and maturation delays on crows and cuckoos
In this paper, a parasitism-mutualism-predation model is proposed to investigate the dynamics of multi-interactions among cuckoos, crows and cats with stage-structure and maturation time delays on cuckoos and crows. The crows permit the cuckoos to parasitize their nestlings (eggs) on the crow chicks (eggs). In return, the cuckoo nestlings produce...Luo, Yantao; Zhang, Long; Teng, Zhidong; DeAngelis, Donald L.
Associations between urban sprawl and life expectancy in the United States
In recent years, the United States has had a relatively poor performance with respect to life expectancy compared to the other developed nations. Urban sprawl is one of the potential causes of the high rate of mortality in the United States. This study investigated cross-sectional associations between sprawl and life expectancy for metropolitan...Hamidi, Shima; Ewing, Reid; Tatalovich, Zaria; Grace, James B.; Berrigan, David