Regions

Southeast

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.

Filter Total Items: 233
2013 Wetland Type Map - Coastal Louisiana
Date Published: April 7, 2016
Status: Active

Influence of Sea-Level Rise on Wetland Vegetation Community Structure, Primary Productivity, Organic Matter Decomposition and Carbon Storage

This study will employ a space for time substitution to show long-term effects of rising sea-level and increasing salinity on vegetation community structure, primary production and decomposition. Productivity and decomposition rates will be estimated for four wetland plant community types defined by salinity zones and dominant plant species. 

Marsh core, Barataria Basin, Louisiana
Date Published: April 6, 2016

Soil Properties and Geochronology in Barataria Basin, Louisiana

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
Date Published: April 6, 2016

Surface Water Hydrology and Nitrate Dynamics in Delta Islands of Prograding Wax Lake Delta, Louisiana

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
Date Published: April 6, 2016

Tracking and Modeling the Population of the Louisiana Black Bear Using “BearTRAK”

"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
Date Published: April 6, 2016
Status: Active

Efficacy of eDNA as an Early Detection and Rapid Response Indicator for Burmese Pythons in the Northern Greater Everglades Ecosystem

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
Date Published: April 6, 2016
Status: Active

Genetic Analysis of the Invasive Burmese Python to Aid Management and Population-Control Decision-Making

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
Date Published: April 5, 2016
Status: Active

Population Biology and Ecology of Diamondback Terrapins in Mangrove Forested Ecosystems in the Greater Everglades

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
Date Published: April 5, 2016

Hydrodynamics and Sediment Transport in Deltas and Coastal Wetlands

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
Date Published: April 1, 2016
Status: Active

Monitoring Effects of Barrier Island Restoration on Piping Plovers in Louisiana

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)
Date Published: March 30, 2016
Status: Active

Evaluation of Tegu Movements and Habitat Use in Relation to Location and Habitat

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
Date Published: March 18, 2016
Status: Active

An Inventory and Comparative Study of Bees, A Keystone Ecological Group in the Endangered Coastal Prairie of Louisiana

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.

Contacts: Larry Allain
Okaloosa Darter
Date Published: March 18, 2016
Status: Active

Population Monitoring of the Federally Threatened Okaloosa Darter at Eglin Air Force Base

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.

Contacts: Howard Jelks
Filter Total Items: 172
Publication Thumbnail
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

Publication Thumbnail
Year Published: 2014

Invasive lionfish use a diversity of habitats in Florida

Two species of lionfish (Pterois volitans and Pterois miles) are the first marine fishes known to invade and establish self-sustaining populations along the eastern seaboard of the United States. First documented off the coast of Florida in 1985, lionfish are now found along the Atlantic coast of the United States as well as in the Caribbean Sea...

Schofield, Pamela J.; Akins, Lad; Gregoire-Lucente, Denise R.; Pawlitz, Rachel J.
Invasive lionfish use a diversity of habitats in Florida; 2014; FS; 2014-3032; Schofield, Pamela J.; Akins, Lad; Gregoire-Lucente, Denise R.; Pawlitz, Rachel J.

Publication Thumbnail
Year Published: 2014

Mechanisms of aquatic species invasions across the SALCC - an update

The USGS Nonindigenous Aquatic Species Database (NAS; nas.er.usgs.gov) is a comprehensive tool for demonstrating where and when nonindigenous species have been sighted across the U.S. Information in the database is used for state-level invasive species management plans, to focus monitoring efforts, for public education, predictive modeling, and...

Benson, Amy J.
Benson, A.J., 2014, Mechanisms of aquatic species invasions across the SALCC - an update: Southeast Atlantic Landscape Conservation Cooperative, Setting a course for a sustainable landscape, 1 p., http://www.southatlanticlcc.org/profiles/blogs/mechanisms-of-aquatic-species-invasions-across-the-salcc-an.

Publication Thumbnail
Year Published: 2013

A bibliography of all known publications & reports on the Gulf sturgeon, Acipenser oxyrinchus desotoi

This functional bibliography is meant to be a complete and comprehensive bibliography of all discoverable reports containing information on the Gulf Sturgeon (GS). This bibliography contains all known reports presenting, documenting, summarizing, listing, or interpreting information on the GS through 31 December 2013. Report citations are...

Price, Melissa; Adler, Jennifer; Littles, Chanda; Randolph, April Norem; Nash, Ursula A.; Gillett, Bethan; Randall, Michael T.; Sulak, Kenneth J.; Walsh, Stephen J.; Brownell, Prescott

Publication Thumbnail
Year Published: 2013

Ecology of juvenile hawksbills (Eretmochelys imbricata) at Buck Island Reef National Monument, US Virgin Islands

Surveys of juvenile hawksbills around Buck Island Reef National Monument, US Virgin Islands from 1994 to 1999 revealed distributional patterns and resulted in a total of 75 individual hawksbill captures from all years; turtles ranged from 23.2 to 77.7 cm curved carapace length (CCL; mean 42.1 ± 12.3 cm SD). Juveniles...

Hart, Kristen M.; Sartain-Iverson, Autumn R.; Hillis-Starr, Zandy; Phillips, Brendalee; Mayor, Philippe A.; Roberson, Kimberly; Pemberton, Roy A.; Allen, Jason B.; Lundgren, Ian; Musick, Susanna

Publication Thumbnail
Year Published: 2013

Landscape-level estimation of nitrogen removal in coastal Louisiana wetlands: potential sinks under different restoration scenarios

Coastal eutrophication in the northern Gulf of Mexico (GOM) is the primary anthropogenic contributor to the largest zone of hypoxic bottom waters in North America. Although biologically mediated processes such as denitrification (Dn) are known to act as sinks for inorganic nitrogen, it is unknown what contribution denitrification makes to...

Rivera-Monroy, Victor H.; Branoff, Benjamin; Meselhe, Ehab; McCorquodale, Alex; Dortch, Mark; Steyer, Gregory D.; Visser, Jenneke; Wang, Hongqing
Landscape-level estimation of nitrogen removal in coastal Louisiana wetlands: potential sinks under different restoration scenarios; 2013; Article; Journal; Journal of Coastal Research; Rivera-Monroy, Victor H.; Branoff, Benjamin; Meselhe, Ehab; McCorquodale, Alex; Dortch, Mark; Steyer, Gregory D.; Visser, Jenneke; Wang, Hongqing

Publication Thumbnail
Year Published: 2013

Monitoring vegetation response to episodic disturbance events by using multitemporal vegetation indices

Normalized Difference Vegetation Index (NDVI) derived from MODerate-resolution Imaging Spectroradiometer (MODIS) satellite imagery and land/water assessments from Landsat Thematic Mapper (TM) imagery were used to quantify the extent and severity of damage and subsequent recovery after Hurricanes Katrina and Rita of 2005 within the vegetation...

Steyer, Gregory D.; Couvillion, Brady R.; Barras, John A.
Monitoring vegetation response to episodic disturbance events by using multitemporal vegetation indices; 2013; Article; Journal; Journal of Coastal Research; Steyer, Greg D.; Couvillion, Brady R.; Barras, John A.

Publication Thumbnail
Year Published: 2013

Economic vulnerability to sea-level rise along the northern U.S. Gulf Coast

The northern Gulf of Mexico coast of the United States has been identified as highly vulnerable to sea-level rise, based on a combination of physical and societal factors. Vulnerability of human populations and infrastructure to projected increases in sea level is a critical area of uncertainty for communities in the extremely low-lying and flat...

Thatcher, Cindy A.; Brock, John C.; Pendleton, Elizabeth A.
Economic vulnerability to sea-level rise along the northern U.S. Gulf Coast; 2013; Article; Journal; Journal of Coastal Research; Thatcher, Cindy A.; Brock, John C.; Pendleton, Elizabeth A.

Publication Thumbnail
Year Published: 2012

Fire reinforces structure of pondcypress (Taxodium distichum var. imbricarium) domes in a wetland landscape

Fire periodically affects wetland forests, particularly in landscapes with extensive fire-prone uplands. Rare occurrence and difficulty of access have limited efforts to understand impacts of wildfires fires in wetlands. Following a 2009 wildfire, we measured tree mortality and structural changes in wetland forest patches. Centers of these...

Watts, Adam C.; Kobziar, Leda N.; Snyder, James R.

Publication Thumbnail
Year Published: 2012

Life at the hyperarid margin: novel bacterial diversity in arid soils of the Atacama Desert, Chile

Nearly half the earth's surface is occupied by dryland ecosystems, regions susceptible to reduced states of biological productivity caused by climate fluctuations. Of these regions, arid zones located at the interface between vegetated semiarid regions and biologically unproductive hyperarid zones are considered most vulnerable. The objective of...

Neilson, Julia W.; Quade, Jay; Ortiz, Marianyoly; Nelson, William M.; Legatzki, Antje; Tian, Fei; LaComb, Michelle; Betancourt, Julio L.; Wing, Rod A.; Soderlund, Carol A.; Maier, Raina M.
Attribution: Southeast, Chile
Life at the hyperarid margin: novel bacterial diversity in arid soils of the Atacama Desert, Chile; 2012; Article; Journal; Extremophiles; Neilson, Julia W.; Quade, Jay; Ortiz, Marianyoly; Nelson, William M.; Legatzki, Antje; Tian, Fei; LaComb, Michelle; Betancourt, Julio L.; Wing, Rod A.; Soderlund, Carol A.; Maier, Raina M.

Publication Thumbnail
Year Published: 2012

Gulf Coast Ecosystem Restoration Task Force---Gulf of Mexico Ecosystem Science Assessment and Needs

The Gulf Coast Ecosystem Restoration Task Force (GCERTF) was established by Executive Order 13554 as a result of recommendations from “America’s Gulf Coast: A Long-term Recovery Plan after the Deepwater Horizon Oil Spill” by Secretary of the Navy Ray Mabus (Mabus Report). The GCERTF consists of members from 11 Federal agencies and representatives...

Walker, Shelby; Dausman, Alyssa M.; Lavoie, Dawn L.
Attribution: Southeast

Publication Thumbnail
Year Published: 2011

Vertebrate species introductions in the United States and its territories

At least 1,065 introduced vertebrate species have been introduced in the United States and its territories, including at least 86 mammalian, 127 avian, 179 reptilian/amphibian, and 673 fish species. Examples in each major taxonomic group include domestic cat, small Indian mongoose, red fox, goat, pig, rabbit, rats, house mouse, gray squirrel,...

Witmer, Gary W.; Fuller, Pam L.
Vertebrate species introductions in the United States and its territories; 2011; Article; Journal; Current Zoology; Witmer, Gary W.; Fuller, Pam L.