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.

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Sea turtles, pythons, & manatees, oh my: USGS science in Florida

Sea turtles, pythons, & manatees, oh my: USGS science in Florida

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News

A Cuban treefrog on a palm frond
April 25, 2018

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.

An image of a Giant Applesnail
April 23, 2018

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.

Manatee and Dr. Margaret Hunter underwater
March 19, 2018

Environmental DNA picks up traces of the elusive mammals’ saliva, skin, waste, or exhaled breaths.

 

Publications

Year Published: 2018

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.
Ding, X., Ye, S., Yuan, H., and Krauss, K.W., 2018, Spatial distribution and ecological risk assessment of heavy metals in coastal surface sediments in the Hebei Province offshore area, Bohai Sea, China: Marine Pollution Bulletin, v. 131, Part A, p. 655-661, https://doi.org/10.1016/j.marpolbul.2018.04.060.

Year Published: 2018

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.
Luo, Y., Zhang, L., Teng, Z., and DeAngelis, D.L., 2018, A parasitism-mutualism-predation model consisting of crows, cuckoos and cats with stage-structure and maturation delays on crows and cuckoos: Journal of Theoretical Biology, v. 446, p. 212-228, https://doi.org/10.1016/j.jtbi.2018.02.028.

Year Published: 2018

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
Hamidi, S., Ewing, R., Tatalovich, Z., Grace, J.B., and Berrigan, D., 2018, Associations between urban sprawl and life expectancy in the United States: International Journal of Environmental Research and Public Health, v. 15, no. 5, art, 861, https://doi.org/10.3390/ijerph15050861.