Regions L2 Landing Page Tabs
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.
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...
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.
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 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.
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....
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.
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.
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.
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....
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 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.
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.
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
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.
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
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
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
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
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
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.
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
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
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.
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
All affected USGS scientists are alive and well, and our flood work continues...
Six streamgages Set peaks of record and 50 stations were overtopped by floodwaters.
“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)
At least one pharmaceutical chemical was detected in all 59 streams sampled
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.
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.
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.
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.
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.
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.
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.
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.