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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.

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Metro Nashville Flood Monitoring Project
September 19, 2016

Metro Nashville Flood Monitoring Project-This project monitors the Cumberland River and it's tributaries around the Nashville Metro Area. You can learn more at: http://tn.water.usgs.gov/projects/metronashville/index.html...

Self-documenting envelope method for quantifying egg mass hatch-out
September 15, 2016

Maculata applesnails (Pomacea maculata) are exotic freshwater snails that have been widely introduced along the Gulf of Mexico coast. The snails can significantly impact freshwater macrophytes and reduce the quality of water bodies.

Nutria caught by camera trap at the Dugas Road Landfill, Lafayette LA
August 30, 2016

Nutrias (Myocastor coypus) are an aquatic rodent imported from South America to the United States in the 1920-40’s for the fur farms. Since their original importation they have become established in the wild in many regions of the United States....

Maculata applesnail (Pomacea maculata)
August 25, 2016

Maculata applesnails (Pomacea maculata) are exotic freshwater snails that have been widely introduced along the Gulf of Mexico coast. They can significantly impact freshwater macrophytes and reduce water quality.

A genetic analysis illustration
August 10, 2016

The Molecular Ecology Laboratory applies genetic and genomic technologies to address a variety of complex questions and conservation issues facing the management of the Nation's fish and wildlife resources. Together with our partners, we design and implement studies to document genetic diversity and the distribution of genetic variation among individuals, populations, and species....

Aerial image, Chincoteague NWR boundary
August 2, 2016

Tropical storms and hurricanes wreak havoc with coastal forests where damage can vary with wind speed and approach from isolated treefalls to wide-area blowdowns of whole forests.

Weighing sturgeon prior to tagging
August 1, 2016

The Gulf sturgeon, Acipenser oxyrinchus desotoi, has been listed as Threatened since 1991. Beginning in 1986, USGS has been investigating sturgeon population abundance and ecology throughout its range, but mostly in the Suwannee River.

Port of the Islands (POI) basin
August 1, 2016

Critical information predicting condition changes in manatee habitat resulting from the alteration of freshwater flows to estuaries is needed to develop the PSRP Detailed Design and PSRP Operations Plan components and complete consultation under the Endangered Species Act.

Validated modeling and sampling methodology
August 1, 2016

Turbid water conditions make the delineation and characterization of benthic habitats difficult by traditional in situ and remote sensing methods. Consequently, only a small fraction of this valuable resource has been mapped or characterized....

Student Intern Alejandro Grajal-Puche holds an Argentine black and white tegu lizard.
July 7, 2016

This project involves ongoing development of tools for the detection and capture of invasive reptiles in Florida, with an emphasis on Burmese pythons (Python bivittatus) and Black and white tegu lizards (Salvator merianae). The goals are to reduce the risk of reptile invasions in high-value resources such as Everglades National Park and the Florida Keys, to access early...

The CWPPRA outreach staff at WARC speaking to a large group
June 22, 2016

The Coastal Wetlands Planning, Protection and Restoration Act (CWPPRA) is federal legislation enacted in 1990 designed to identify, prepare, and fund construction of coastal wetlands restoration projects.

Ornate Chorus Frog, Pseudacris ornata
June 17, 2016

Freshwater wetlands provide critical habitat for a diverse array of organisms, including many amphibians. Yet, under the threat of climate change, these habitats are among the most imperiled ecosystems on Earth.

Filter Total Items: 172
Detection limits of quantitative and digital PCR assays and their influence in presence-absence surveys of environmental DNA
Year Published: 2017

Detection limits of quantitative and digital PCR assays and their influence in presence-absence surveys of environmental DNA

A set of universal guidelines is needed to determine the limit of detection (LOD) in PCR-based analyses of low concentration DNA. In particular, environmental DNA (eDNA) studies require sensitive and reliable methods to detect rare and cryptic species through shed genetic material in environmental samples. Current strategies for assessing...

Hunter, Margaret; Dorazio, Robert M.; Butterfield, John S.; Meigs-Friend, Gaia; Nico, Leo; Ferrante, Jason
Hunter, M.E., Dorazio, R.M., Butterfield, J.S.S., Meigs-Friend, G., Nico, L.G., and Ferrante, J.A., 2016, Detection limits of quantitative and digital PCR assays and their influence in presence-absence surveys of environmental DNA: Molecular Ecology Resources, Accepted Online Early, http://dx.doi.org/10.1111/1755-0998.12619.
A landscape-scale assessment of above- and belowground primary production in coastal wetlands: Implications for climate change-induced community shifts
Year Published: 2017

A landscape-scale assessment of above- and belowground primary production in coastal wetlands: Implications for climate change-induced community shifts

Above- and belowground production in coastal wetlands are important contributors to carbon accumulation and ecosystem sustainability. As sea level rises, we can expect shifts to more salt-tolerant communities, which may alter these ecosystem functions and services. Although the direct influence of salinity on species-level primary production has...

Stagg, Camille L.; Schoolmaster, Donald R.; Piazza, Sarai C.; Snedden, Gregg; Steyer, Gregory D.; Fischenich, Craig J; McComas, Robert W.
Stagg, C.L., Schoolmaster, D.R., Jr., Piazza, S.C., Snedden, G., Steyer, G.D., Fischenich, C.J., and McComas, R.W., 2016, A landscape-scale assessment of above- and belowground primary production in coastal wetlands: implications for climate change-induced community shifts: Estuaries and Coasts, First Online, http://dx.doi.org/10.1007/s12237-016-0177-y.
Mangrove expansion and contraction at a poleward range limit: Climate extremes and land-ocean temperature gradients
Year Published: 2017

Mangrove expansion and contraction at a poleward range limit: Climate extremes and land-ocean temperature gradients

Within the context of climate change, there is a pressing need to better understand the ecological implications of changes in the frequency and intensity of climate extremes. Along subtropical coasts, less frequent and warmer freeze events are expected to permit freeze-sensitive mangrove forests to expand poleward and displace freeze-tolerant salt...

Osland, Michael J.; Day, Richard H.; Hall, Courtney T.; Brumfield, Marisa D; Dugas, Jason; Jones, William R.
Litterfall production of mangroves in the Huizache-Caimanero lagoon system, México
Year Published: 2017

Litterfall production of mangroves in the Huizache-Caimanero lagoon system, México

The ecological legacy of the Huizache-Caimanero lagoon system has long been known as a trophically rich and productive ecosystem that supported artisanal fisheries of local and regional importance; however, a decline in fisheries' yields has been observed in recent decades. Mangroves are a fundamental component of this ecosystem, though data...

Flores-Cárdenas, Francisco; Hurtado-Oliva, Miguel Ángel; Doyle, Thomas W.; Nieves-Sotol, Mario; Díaz-Castro, Sara; Manzano-Sarabia, Marlenne
Flores-Cárdenas, F., Hurtado-Oliva, M.A., Doyle, T.W., Nieves-Soto, M., Díaz-Castro, S., and Manzano-Sarabia, M., xxxx, Litterfall production of mangroves in Huizache-Caimanero lagoon system, México, Journal of Coastal Research, Online Ahead of Print, http://dx.doi.org/10.2112/JCOASTRES-D-15-00242.1.
Hydrologic modeling in a marsh-mangrove ecotone: Predicting wetland surface water and salinity response to restoration in the Ten Thousand Islands region of Florida, USA
Year Published: 2017

Hydrologic modeling in a marsh-mangrove ecotone: Predicting wetland surface water and salinity response to restoration in the Ten Thousand Islands region of Florida, USA

At the fringe of Everglades National Park in southwest Florida, United States, the Ten Thousand Islands National Wildlife Refuge (TTINWR) habitat has been heavily affected by the disruption of natural freshwater flow across the Tamiami Trail (U.S. Highway 41). As the Comprehensive Everglades Restoration Plan (CERP) proposes to restore the natural...

Michot, B.D.; Meselhe, E.A.; Krauss, Ken W.; Shrestha, Surendra; From, Andrew S.; Patino, Eduardo
Michot, B., Meselhe, E., Krauss, K., Shrestha, S., From, A., and Patino, E., 2015, Hydrologic modeling in a marsh-mangrove ecotone: predicting wetland surface water and salinity response to restoration in the Ten Thousand Islands region of Florida, USA: Journal of Hydrologic Engineering, D4015002, http://dx.doi.org/10.1061/(ASCE)HE.1943-5584.0001260.
Status of scientific knowledge, recovery progress, and future research directions for the Gulf Sturgeon, Acipenser oxyrinchus desotoi Vladykov, 1955
Year Published: 2016

Status of scientific knowledge, recovery progress, and future research directions for the Gulf Sturgeon, Acipenser oxyrinchus desotoi Vladykov, 1955

The Gulf Sturgeon, Acipenser oxyrinchus desotoi, is an anadromous species of Acipenseridae and native to North America. It currently inhabits and spawns in the upper reaches of seven natal rivers along the northern coast of the Gulf of Mexico from the Suwannee River, Florida, to the Pearl River, Louisiana, during spring to autumn. Next to the...

Sulak, Kenneth J.; Parauka, F; Slack, W. Todd; Ruth, T; Randall, Michael; Luke, K; Mette, M. F; Price, M. E
Sulak, K. J., Parauka, F., Slack, W.T., Ruth, R.T., Randall, M.T., Luke, K., Mettee, M.F., and Price, M.E., 2016, Status of scientific knowledge, recovery progress, and future research directions for the Gulf Sturgeon, Acipenser oxyrinchus desotoi Vladykov, 1955: Journal of Applied Ichthyology, v. 32, suppl. 1, p. 87-161, http://dx.doi.org/10.1111/jai.13245.
Are we working towards global research priorities for management and conservation of sea turtles?
Year Published: 2016

Are we working towards global research priorities for management and conservation of sea turtles?

In 2010, an international group of 35 sea turtle researchers refined an initial list of more than 200 research questions into 20 metaquestions that were considered key for management and conservation of sea turtles. These were classified under 5 categories: reproductive biology, biogeography, population ecology, threats and conservation strategies...

Rees, A.F.; Alfaro-Shigueto, J.; Barata, P.C.R.; Bjorndal, K.A.; Bolten, A.B.; Bourjea, J.; Broderick, A.C.; Campbell, L.M.; Cardona, L.; Carreras, C.; Casale, P.; Ceriani, S.A.; Dutton, P.H.; Eguchi, T.; Formia, A.; Fuentes, M.M.P.B.; Fuller, W.J.; Girondot, M.; Godfrey, M.H.; Hamann, M.; Hart, Kristen M.; Hays, G.C.; Hochscheid, S.; Kaska, Y.; Jensen, M.P.; Mangel, J.C.; Mortimer, J.A.; Naro-Maciel, E.; Ng, C.K.Y.; Nichols, W.J.; Phillott, A.D.; Reina, R.D.; Revuelta, O.; Schofield, G.; Seminoff, J.A.; Shanker, K.; Tomás, J.; van de Merwe, J.P.; Van Houtan, K.S.; Vander Zanden, H.B.; Wallace, B.P.; Wedemeyer-Strombel, K.R.; Work, Thierry M.; Godley, B.J.
Overcoming challenges to the recovery of declining amphibian populations in the United States
Year Published: 2016

Overcoming challenges to the recovery of declining amphibian populations in the United States

The US Endangered Species Act of 1973 (ESA) affords many potential benefits to species threatened with extinction. However, most at-risk amphibians—one of the most imperiled vertebrate groups—remain unlisted under the provisions of the ESA, and many impediments to recovery exist for those species that have been listed. Of the 35 US amphibian...

Walls, Susan; Ball, Lianne C.; Barichivich, William J.; Dodd, Kenneth; Enge, Kevin M; Gorman, Thomas A.; O'Donnell, Katherine; Palis, John G; Semlitsch, Raymond D.
Walls, S.C., Ball, L.C., Barichivich, W.J., Dodd, C.K., Jr., Enge, K.M., Gorman,T.A., O'Donnell, K.M., Palis, J.G., and Semlitsch, R.D., 2016, Overcoming challenges to the recovery of declining amphibian populations in the United States: BioScience, First Online, http://dx.doi.org/10.1093/biosci/biw153.
The practice of prediction: What can ecologists learn from applied, ecology-related fields?
Year Published: 2016

The practice of prediction: What can ecologists learn from applied, ecology-related fields?

The pervasive influence of human induced global environmental change affects biodiversity across the globe, and there is great uncertainty as to how the biosphere will react on short and longer time scales. To adapt to what the future holds and to manage the impacts of global change, scientists need to predict the expected effects with some...

Pennekamp, Frank; Adamson, Matthew; Petchey, Owen L; Poggiale, Jean-Christophe; Aguiar, Maira; Kooi, Bob W.; Botkin, Daniel B.; DeAngelis, Don
Pennekamp, F., Adamson, M.W., Petchey, O.L., Poggiale, J.-C., Aguiar, M., Kooi, B.W., Botkin, D.B., and DeAngelis, D.L., 2016, The practice of prediction: What can ecologists learn from applied, ecology-related fields?: Ecological Complexity, Available Online, http://dx.doi.org/10.1016/j.ecocom.2016.12.005.
Barrier island breach evolution: Alongshore transport and bay-ocean pressure gradient interactions
Year Published: 2016

Barrier island breach evolution: Alongshore transport and bay-ocean pressure gradient interactions

Physical processes controlling repeated openings and closures of a barrier island breach between a bay and the open ocean are studied using aerial photographs and atmospheric and hydrodynamic observations. The breach site is located on Pea Island along the Outer Banks, separating Pamlico Sound from the Atlantic Ocean. Wind direction was a major...

Safak, Ilgar; Warner, John C.; List, Jeffrey
Safak, I., J. C. Warner, and J. H. List (2016), Barrier island breach evolution: Alongshore transport and bay-ocean pressure gradient interactions, J. Geophys. Res. Oceans, 121, doi:10.1002/2016JC012029.
Mechanisms of aquatic species invasions across the South Atlantic Landscape Conservation Cooperative region
Year Published: 2016

Mechanisms of aquatic species invasions across the South Atlantic Landscape Conservation Cooperative region

Invasive species are a global issue, and the southeastern United States is not immune to the problems they present. Therefore, various analyses using modeling and exploratory statistics were performed on the U.S. Geological Survey Nonindigenous Aquatic Species (NAS) Database with the primary objective of determining the most appropriate use of...

Benson, Amy J.; Stith, Bradley M.; Engel, Victor C.
Benson, A.J., Stith, B.M., and Engel, V.C., 2016, Mechanisms of aquatic species invasions across the South Atlantic Landscape Conservation Cooperative region: U.S. Geological Survey Scientific Investigations Report 2016–5148, 68 p., https://doi.org/10.3133/sir20165148.
A rare Uroglena bloom in Beaver Lake, Arkansas, spring 2015
Year Published: 2016

A rare Uroglena bloom in Beaver Lake, Arkansas, spring 2015

A combination of factors triggered a Uroglena volvox bloom and taste and odor event in Beaver Lake, a water-supply reservoir in northwest Arkansas, in late April 2015. Factors contributing to the bloom included increased rainfall and runoff containing increased concentrations of dissolved organic carbon, followed by a stable pool, low nutrient...

William R. Green and Brad Hufhines
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Digital Elevation Model in the Atchafalaya Basin, LA
2016 (approx.)
Digital Elevation Model in the Atchafalaya Basin, LA
 Beach erosion at Rodanthe, NC, along the coast on August 30, 2011, three days after landfall of Hurricane Irene
April 14, 2016
Oblique aerial photograph near Rodanthe, NC, along the coast on August 30, 2011, three days after landfall of Hurricane Irene. A breach was carved through the barrier island, severing NC Highway 12. The storm surge was approximately 2 m high on the sound-side and was less on the ocean-side. Flow from the sound to the ocean may have played a role in cutting the breaches between Oregon Inlet and...
A colony of the soft coral known as the "bent sea rod" stands bleached on a reef off of Islamorada, Florida.
April 12, 2016
A colony of the soft coral known as the "bent sea rod" stands bleached on a reef off of Islamorada, Florida. Hard and soft corals are presently bleaching- losing their symbiotic algae – all over the coral reefs of the Florida Keys due to unusually warm ocean temperatures this summer. Months with waters warmer than 85 F have become more frequent in the last several decades compared to a century...
Monarchs
2015 (approx.)
The Eastern, migratory population of monarch butterflies has declined by about 80 percent over the last decade.
Image shows sand in a hand
2015 (approx.)
Frac sands used in unconventional oil and gas development.
Elkhorn coral has died and turned to rubble.
2015 (approx.)
These Elkhorn corals ( Acropora palmata ) near Buck Island, U.S. Virgin Islands have died and collapsed into rubble. As coral reef structure degrades, valuable habitat for marine life is lost and nearby coastlines become more susceptible to storms, waves and erosion.
Strong River at D'Lo Mississippi
2015 (approx.)
This image was taken at the Strong River at D'Lo, Mississippi by Shane Stocks who is a Hydrologic Technician out of the Jackson, MS office. Shane used an infared camera to take this long exposure shot of the river.
U.S. Life-Saving Station in Portsmouth Historic Village, Cape Lookout National Seashore
November 2015 (approx.)
A U.S. Life-Saving Station in Portsmouth Historic Village, Cape Lookout National Seashore. The station was build in 1894 to rescue ship-wrecked mariners. This is one of many cultural resources at Cape Lookout National Seashore that may be threatened by climate change. Erin Seekamp, a researcher working with the DOI Southeast Climate Science Center (managed by USGS), is developing a method to...
The 1859 Cape Lookout Lighthouse and keeper's quarters
September 2015 (approx.)
The 1859 Cape Lookout Lighthouse and keeper's quarters, Cape Lookout National Seashore. This is one of many cultural resources at Cape Lookout National Seashore that may be threatened by climate change. Erin Seekamp, a researcher working with the DOI Southeast Climate Science Center (managed by USGS), is developing a method to identify which of the Park's cultural resources are most in need of...
The 1907 Keeper's Quarters, Cape Lookout National Seashore
September 2015 (approx.)
The 1907 Keeper's Quarter's, Cape Lookout National Seashore. This house was originally located by the lighthouse, but was moved in 1958 when it was no longer needed and was used as a private residence. This is one of many cultural resources at Cape Lookout National Seashore that may be threatened by climate change. Erin Seekamp, a researcher working with the DOI Southeast Climate Science Center (...
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Image shows a flooded street with a USGS truck nearby
August 19, 2016

All affected USGS scientists are alive and well, and our flood work continues...

Catawba rhododendron blooming at Round Bald, NC
August 11, 2016

“From the mountains to the coast, the southeastern U.S. contains ecosystems that harbor incredible biodiversity. Many of those ecosystems are already highly at risk from urbanization and other human land-use change. Identifying the ecosystems at risk from climate change will help inform conservation and management to ensure we don’t lose that biodiversity.” (Jennifer Constanza, report author)

USGS science for a changing world logo
March 14, 2016

The U.S. Geological Survey has created 20 new flood inundation maps that can help South Carolinians take steps to prevent or reduce future flood damage in the areas affected by the widespread floods of October 2015.

A juvenile Broad-banded Watersnake that tested positive for snake fungal disease (SFD) exhibiting ulceration of the skin.
March 1, 2016

Snake fungal disease, or SFD, a disease causing high mortality rates in some species of snakes, has been found in Louisiana for the first time, according to a new study by U.S. Geological Survey scientists. SFD now has been confirmed in at least 16 states in the Eastern and Midwestern United States.

USGS logo
January 15, 2016

Significant flood peaks occurred across the Arkansas, White and Red River Basins in Arkansas beginning on Dec. 26 and the rivers are still high, according to the U.S. Geological Survey.

Hydrograph of White River at Augusta, Arkansas, December 24-31, 2015. Left side shows Gage height 31-36 feet. Bottom is days.
December 31, 2015

Heavy rainfall of up to 10 inches in northern and western Arkansas that fell during the Christmas weekend is still causing major flooding in some areas.

USGS logo
November 17, 2015

Fact sheets that detail information about parish water resources and water-use are available online for 34 of the state’s 64 parishes, with more coming soon.

USGS logo
November 10, 2015

A new interactive Flood Inundation Map to improve flood warnings and assist with emergency management along Big Creek in Alpharetta and Roswell, Georgia, was debuted during a ceremony today in Alpharetta’s Rock Mill Park.

Gator
October 28, 2015

Alligators and the Everglades go hand-in-hand, and as water conditions change in the greater Everglades ecosystem, gators are one of the key species that could be affected.

Satellite image of the Gulf of Mexico and coastline, Gulf Hypoxic Zone
October 19, 2015

Hypoxia sounds as bad as it is. It refers to an environment that is too low on oxygen to sustain most aerobic life, particularly an aquatic environment. Hypoxia is most problematic when it happens where oxygen is normally plentiful, because most living organisms require oxygen to continue living.