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We conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens and landscapes of the Southeastern United States and the Caribbean region.

Filter Total Items: 232
Marsh core, Barataria Basin, Louisiana
April 6, 2016

Will wetland vertical accretion rates be enough to keep up with the predicted rates of sea level rise? USGS looks at soil properties and geochronology in Louisiana wetlands. ...

Wax Lake Delta, Louisiana
April 6, 2016

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. ...

BearTRAK entry cell phone app illustration
April 6, 2016

"BearTrak" is an app that provides a central repository for Louisiana Black Bear tracking data, allowing managers to access information more quickly and reliably....

Three pythons well camoflaged
April 6, 2016

Traditional approaches to locating Burmese pythons - including visual searches and trapping - have resulted in low detection. Environmental DNA - or eDNA - is increasingly being used to detect the presence of non-native species, particularly when traditional methods may not be adequate. ...

Captured Burmese python
April 6, 2016

Invasive Burmese pythons threaten the success of Everglades restoration efforts. To assist with management and population control decision making, USGS scientists are implementing genetic studies to identify potential new entry pathways and to help quantify the size of the breeding population....

Gathering baseline data on mangrove terrapin body size
April 5, 2016

Long-term capture-recapture research in the Everglades National Park provides baseline information on the Diamondback Terrapin, a species that may be threatened by human disturbances.

Measure sediment on aquatic vegetation
April 5, 2016

Diversions are being used to encourage Missippi River delta growth via increased sediment availability to coastal wetlands. USGS studies hydrodynamics and sediment transport in Louisiana to better understand how marshes and deltas respond to these sediment inputs. ...

Monitoring Effects of Barrier Island Restoration on Piping Plovers in Louisiana
April 1, 2016

The federally threatened piping plover relies on sand-beach habitat year-round for nesting, foraging, and roosting, habitat that is particularly vulnerable to loss and degradation from coastal development, recreation activities, erosion, and sea-level rise. ...

Argentine black-and-white tegu (Tupinambis merianae)
March 30, 2016

Tegus are breeding, they have a diverse diet, and they are established in areas throughout South Florida. USGS is tracking this problematic reptile species to better understand their movements and habitat use to help managers prevent dispersal into new areas.

Bee pollinating a flowering coastal prairie plant
March 18, 2016

Much of Louisiana's coastal prairie has been converted to rice and sugarcane cultivation. USGS is inventorying bee populations in these areas to explore how effective restoration efforts have been....

Okaloosa Darter
March 18, 2016

USGS' and Loyola University New Orleans' innovative research techniques played a role in the decision to downlist the Okaloosa Darter, a freshwater fish endemic to northwest Florida, from Endangered to Threatened....

PolSAR image coverage of the Gulf coast on 23-24
March 17, 2016

Remote sensing helps USGS scientists detect and map surface oil in coastal environments.

Filter Total Items: 183
Year Published: 2015

Plant-plant interactions in a subtropical mangrove-to-marsh transition zone: effects of environmental drivers

Questions Does the presence of herbaceous vegetation affect the establishment success of mangrove tree species in the transition zone between subtropical coastal mangrove forests and marshes? How do plant–plant interactions in this transition zone respond to variation in two primary coastal environmental drivers? Location Subtropical...

Howard, Rebecca J.; Krauss, Ken W.; Cormier, Nicole; Day, Richard H.; Biagas, Janelda M.; Allain, Larry K.
Howard, R.J., Krauss, K.W., Cormier, N., Day, R.H., Biagas, J., and Allain, L., 2015, Plant-plant interactions in a subtropical mangrove-to-marsh transition zone: effects of environmental drivers: Journal of Vegetation Science, v. 26, no. 6, p. 1198-1211, http://dx.doi.org/10.1111/jvs.12309.

Year Published: 2015

Habitat use patterns of the invasive red lionfish Pterois volitans: a comparison between mangrove and reef systems in San Salvador, Bahamas

The Indo-Pacific red lionfish Pterois volitans is widespread both in its native and its non-native habitats. The rapid invasion of this top predator has had a marked negative effect on fish populations in the Western Atlantic and the Caribbean. It is now well documented that lionfish are invading many tropical and sub-tropical habitats....

Pimiento, Catalina; Nifong, James C.; Hunter, Margaret E.; Monaco, Eric; Silliman, Brian R.

Year Published: 2015

Predicting ecological responses of the Florida Everglades to possible future climate scenarios: Introduction

Florida’s Everglades stretch from the headwaters of the Kissimmee River near Orlando to Florida Bay. Under natural conditions in this flat landscape, water flowed slowly downstream as broad, shallow sheet flow. The ecosystem is markedly different now, altered by nutrient pollution and construction of canals, levees, and water control structures...

Aumen, Nicholas G.; Havens, Karl E; Best, G. Ronnie; Berry, Leonard
Attribution: Southeast

Year Published: 2015

Wide-ranging phylogeographic structure of invasive red lionfish in the Western Atlantic and Greater Caribbean

The red lionfish (Pterois volitans) is an invasive predatory marine fish that has rapidly expanded its presence in the Western Hemisphere. We collected 214 invasive red lionfish samples from nine countries and territories, including seven unpublished locations. To more comprehensively evaluate connectivity, we compiled our d-loop sequence ...

Butterfield, John S.; Díaz-Ferguson, Edgardo; Silliman, Brian R.; Saunders, Jonathan W.; Buddo, Dayne; Mignucci-Giannoni, Antonio A.; Searle, Linda; Allen, Aarin Conrad; Hunter, Margaret E.

Year Published: 2015

Do shrubs reduce the adverse effects of grazing on soil properties?

Increases in the density of woody plants are a global phenomenon in drylands, and large aggregations of shrubs, in particular, are regarded as being indicative of dysfunctional ecosystems. There is increasing evidence that overgrazing by livestock reduces ecosystem functions in shrublands, but that shrubs may buffer the negative effects of...

Eldridge, David J.; Beecham, Genevieve; Grace, James B.
Eldridge, D.J., Beecham, G., and Grace, J.B., 2015, Do shrubs reduce the adverse effects of grazing on soil properties?: Ecohydrology, Online Early, http://dx.doi.org/10.1002/eco.1600.

Year Published: 2015

Value of information in natural resource management: technical developments and application to pink-footed geese

The “value of information” (VOI) is a generic term for the increase in value resulting from better information to guide management, or alternatively, the value foregone under uncertainty about the impacts of management (Yokota and Thompson, Medical Decision Making 2004;24: 287). The value of information can be characterized...

Williams, Byron K.; Johnson, Fred A.
Williams, B. K., and F. A. Johnson. 2015. Value of information in natural resource management: technical developments and application to pink-footed geese. Ecology and Evolution 6:In press.

Year Published: 2015

Evaluating the piscicide rotenone as an option for eradication of invasive Mozambique tilapia in a Hawaiian brackish-water wetland complex

Mozambique tilapia Oreochromis mossambicus were recently discovered in ‘Aimakapā Fishpond, a 12-hectare brackish-water wetland complex in Kaloko-Honokōhau National Historical Park, on the Island of Hawai’i. As a possible eradication method, we evaluated rotenone, a natural piscicide used in fish management and the active...

Nico, Leo; Englund, Ronald A.; Jelks, Howard L.

Year Published: 2015

Modelling the effects of seasonality and socioeconomic impact on the transmission of Rift Valley fever virus

Rift Valley fever (RVF) is an important mosquito-borne viral zoonosis in Africa and the Middle East that causes human deaths and significant economic losses due to huge incidences of death and abortion among infected livestock. Outbreaks of RVF are sporadic and associated with both seasonal and socioeconomic effects. Here we propose an almost...

Xiao, Yanyu; Beier, John C.; Cantrell, Robert Stephen; Cosner, Chris; DeAngelis, Donald L.; Ruan, Shigui
Xiao, Y., Beier, J.C., Cantrell, R.S., Cosner, C., DeAngelis, D.L., and Ruan, S., 2015, Modelling the effects of seasonality and socioeconomic impact on the transmission of Rift Valley fever virus: PLoS, Neglected Tropical Diseases, v. 9, no. 1, art. e3388, http://dx.doi.org/10.1371/journal.pntd.0003388.

Year Published: 2015

Global change and conservation triage on National Wildlife Refuges

National Wildlife Refuges (NWRs) in the United States play an important role in the adaptation of social-ecological systems to climate change, land-use change, and other global-change processes. Coastal refuges are already experiencing threats from sea-level rise and other change processes that are largely beyond their ability to influence, while...

Johnson, Fred A.; Eaton, Mitchell; McMahon, Gerard; Raye Nilius; Mike Bryant; Dave Case; Martin, Julien; Wood, Nathan J.; Laura Taylor
Johnson, F.A., Eaton, M.J., McMahon, G., Nilius, R., Bryant, M.R., Case, D.J., Martin, J., Wood, N.J., and Taylor, L., 2015, Global change and conservation triage on National Wildlife Refuges: Ecology and Society, v. 20, no. 4, art. 14, 8 p., http://dx.doi.org/10.5751/ES-07986-200414.

Year Published: 2015

One carp, two carp: are there more carp in the Wailoa River?

The February, 2015 issue of Hawaii Fishing News included the annual list of Hawai`i records for the largest fish of various species caught in the state. Among the new records was one for a 15-pound grass carp (Ctenopharyngodon idella) caught by Avery Berido in the Wailoa River at Hilo on September 13, 2013. A photograph taken by Mr. Berido of the...

Mundy, Bruce C; Nico, Leo; Tagawa, Annette
Mundy B., Nico, L.G., and Tagawa, A., 2015, One carp, two carp: Are there more grass carp in the Wailoa River?: Hawaii Fishing News, v. 40, no. 6, p. 18-19.

Year Published: 2015

The role of citzens in detecting and responding to a rapid marine invasion

Documenting and responding to species invasions requires innovative strategies that account for ecological and societal complexities. We used the recent expansion of Indo-Pacific lionfish (Pterois volitans/miles) throughout northern Gulf of Mexico coastal waters to evaluate the role of stakeholders in documenting and responding to a rapid marine...

Scyphers, Stephen B.; Powers, Sean P.; Akins, J. Lad; Drymon, J. Marcus; Martin, Charles M.; Schobernd, Zeb H.; Schofield, Pamela J.; Shipp, Robert L.; Switzer, Theodore S.
Scyphers, S.B., S.P. Powers, J.L. Akins, J.M. Drymon, C.W. Martin, Z.H. Schobernd, P.J. Schofield,  R.L. Shipp and T.S. Switzer.  2014.  The role of citizens in detecting and responding to a rapid marine invasion.  Conservation Letters  DOI: 10.1111/conl.12127

Year Published: 2014

Predicting spatial and temporal distribution of Indo-Pacific lionfish (Pterois volitans) in Biscayne Bay through habitat suitability modeling

Invasive species may exhibit higher levels of growth and reproduction when environmental conditions are most suitable, and thus their effects on native fauna may be intensified. Understanding potential impacts of these species, especially in the nascent stages of a biological invasion, requires critical information concerning spatial and temporal...

Bernal, Nicholas A.; DeAngelis, Donald L.; Schofield, Pamela J.; Sullivan Sealey, Kathleen