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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: 233
Alabama Barrier Island Restoration Assessment at Dauphin Island
Date Published: April 17, 2016
Status: Active

Alabama Barrier Island Restoration Assessment at Dauphin Island

Dauphin Island, Alabama, is the only barrier island providing protection to much of Alabama's coastal natural resources. Severely impacted by repeated extreme events, like Hurricane Katrina and Deepwater Horizon oil spill, USGS and partners are conducting a joint study to evaluate the feasibility of certain alternatives to increase resiliency and sustainability of the island. 

Past and Future Impacts of Sea Level Rise on Coastal Habitats and Species
Date Published: April 16, 2016

Past and Future Impacts of Sea Level Rise on Coastal Habitats and Species (FISCHS)

USGS aims to integrate biological and hydrological models to help develop management tools to deal with the projected ecological consequences of rising sea level in coastal south Florida.

Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Asian Carp
Date Published: April 16, 2016

Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Asian Carp

The invasive grass carp and black carp are artificially spawned to produce triploids, which means they have three sets of chromosomes and are sterile. WARC scientists invented an early ploidy prediction process for produced fry, and a post-mortem assessment method for carp caught either in the wild or sold and hauled live to other states. 

Climate Change Effects on Coastal Marsh Foundation Species
Date Published: April 16, 2016

Climate Change Effects on Coastal Marsh Foundation Species

Mangrove forests have migrated inland over the past few decades at many locations along the northern Gulf of Mexico coast. This expansion has been attributed to factors associated with climate change, such as increased salinity resulting from sea-level rise and longer intervals between winter freezes, which can kill cold-intolerant mangrove species. 

Asian Tiger Shrimp Distribution and Genetics
Date Published: April 16, 2016
Status: Active

Asian Tiger Shrimp Distribution and Genetics

The Asian tiger shrimp began appearing in commercial shrimp catches in 2006. They grow larger than native shrimp and are known to be fierce predators - so shrimpers and managers are concerned about the potential effects this species might have. 

GIS and Custom Application Support for the Gulf Coast Ecosystem Restoration Council
Date Published: April 16, 2016

GIS and Custom Application Support for the Gulf Coast Ecosystem Restoration Council

 The scientists at the Wetland and Aquatic Science Center (WARC) have provided coastal restoration project managers and decision makers with GIS planning, database and custom application capacity since 1992. The scope and complexity of this support has increased over the years and has resulted in the development of a comprehensive geospatial and advanced application teams that provide decision...

Spatial Analysis Support for Coastal Wetlands Planning, Protection, and Restoration Act (Breaux Bill) Planning Activities
Date Published: April 16, 2016

Spatial Analysis Support for Coastal Wetlands Planning, Protection and Restoration Act (Breaux Bill) Planning Activities

WARC first implemented geographic information systems (GIS) in 1980 to help monitor the nature and extent of wetland habitat changes. The center continues to use GIS, remote sensing, and other computer based technologies to address a wide range of natural resource related issues. 

Migratory Bird Hunting Stamp
Date Published: April 16, 2016

Adaptive Regulation of Waterfowl Harvests Using Incomplete Survey Information

The 2011 (Draft) Supplemental Environmental Impact Statement on Migratory Bird Hunting (EIS) offers four alternatives concerning the timing of the regulatory process for setting waterfowl hunting seasons. The no-change alternative involves a process by which most proposals for hunting seasons are developed in response to survey information that becomes available in early summer, such as...

A WEB Based Searchable Plant Database and Photo Gallery of the Plants of Louisiana
Date Published: April 16, 2016
Status: Active

Visual Guide to Louisiana Plants: A Web Based Searchable Plant Database and Photo Gallery of the Plants of Louisiana

Quality photographs of plant species are rare on the internet, often difficult to find, and are generally copyrighted, preventing them from being used by government agencies and non-government organizations, academics and the general public.

Mississippi River Hydrodynamic and Delta Management Study Map
Date Published: April 14, 2016

Geographic Information and Technical Support

USGS WARC first implemented geographic information systems (GIS) in 1980 to assist in monitoring the nature and extent of wetland habitat changes. Today, geographers and support staff create, maintain, and use geospatial data to analyze restoration efforts in Louisiana. 

Mississippi River Hydro Study Delta Management
Date Published: April 14, 2016

Louisiana Coastal Area (LCA) Ecosystem Restoration Program – Adaptive Management and Monitoring Planning and Implementation Support

Adaptive management (AM) is an iterative science-based process that accepts uncertainties in ecological systems and uses best available science and technology such as research, modeling, experimentation, monitoring and evaluation to address uncertainties. 

Contacts: Michelle Meyers
The Water Cycle for Schools and Kids
Date Published: April 14, 2016

Water Cycle Diagram for Schools

Learn about water! As part of the USGS's Water Science School, we have created a water-cycle diagram for schools and "kids" of all ages, from 5-105. Our diagram is available in over 20 languages. We also offer an interactive diagram which allows you to "...

Filter Total Items: 172
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Year Published: 2016

Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas

Bottomland hardwood (BLH) forests represent an extensive wetland system in the Mississippi Alluvial Valley and southeastern USA, and it is currently undergoing widespread transition in species composition. One such transition involves increased establishment of sugarberry (Celtis laevigata), and decreased establishment of overcup oak (Quercus...

Schweitzer, Callie Jo; Clatterbuck, Wayne K.; Oswalt, Christopher M.; Allen, Scott T.; Cochran, Wesley; Krauss, Ken W.; Keim, Richard F.; King, Sammy L.
Allen, S.T., Cochran, J.W., Krauss, K.W., Keim, R.F., and King, S.L., 2016, Hydrologic effects on diameter growth phenology for Celtis laevigata and Quercus lyrata in the floodplain of the lower White River, Arkansas: in Schweitzer, C.J., Clatterbuck, W.K., and Oswalt, C.M., eds., Proceedings of the 18th Biennial Southern Silvicultural Research Conference, USDA Forest Service General Technical Report SRS-212, p. 273-279: Asheville, N.C.

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Year Published: 2016

A pilot study testing a natural and a synthetic Molluscicide for controlling invasive apple snails (Pomacea maculata)

Pomacea maculata (formerly P. insularum), an apple snail native to South America, was discovered in Louisiana in 2008. These snails strip vegetation, reproduce at tremendous rates, and have reduced rice production and caused ecosystem changes in Asia. In this pilot study snails were exposed to two molluscicides, a tea (Camellia sinensis...

Olivier, Heather M.; Jenkins, Jill A.; Berhow, Mark; Carter, Jacoby

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Year Published: 2016

A quantitative framework for estimating risk of collision between marine mammals and boats

Speed regulations of watercraft in protected areas are designed to reduce lethal collisions with wildlife but can have economic consequences. We present a quantitative framework for investigating the risk of deadly collisions between boats and wildlife. We apply encounter rate theory to demonstrate how marine mammal-boat encounter rate can be used...

Martin, Julien; Sabatier, Quentin; Gowan, Timothy A.; Giraud, Christophe; Gurarie, Eliezer; Calleson, Scott; Ortega-Ortiz, Joel G.; Deutsch, Charles J.; Rycyk, Athena; Koslovsky, Stacie M.
Martin, J., Sabatier, Q., Gowan, T.A., Giraud, C., Gurarie, E., Calleson, C.S., Ortega-Ortiz, J.G., Deutsch, C.J., Rycyk, A., and Koslovsky, S.M., 2016, A quantitative framework for investigating risk of deadly collisions between marine wildlife and boats: Methods in Ecology and Evolution, v. 7, no. 1, p. 42-50, http://dx.doi.org/10.1111/2041-210X.12447.

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Year Published: 2016

Generic reclassification and species boundaries in the rediscovered freshwater mussel ‘Quadrula’ mitchelli (Simpson in Dall, 1896)

The Central Texas endemic freshwater mussel, Quadrula mitchelli (Simpson in Dall, 1896), had been presumed extinct until relict populations were recently rediscovered. To help guide ongoing and future conservation efforts focused on Q. mitchelli we set out to resolve several uncertainties regarding its evolutionary history...

Pfeiffer, John M.; Johnson, Nathan A.; Randklev, Charles R.; Howells, Robert G.; Williams, James D.
Pfeiffer, J.M., III, Johnson, N.A., Randklev, C.R., Howells, R.G., and Williams, J.D., 2016, Generic reclassification and species boundaries in the rediscovered freshwater mussel ‘Quadrula’ mitchelli (Simpson in Dall, 1896): Conservation Genetics, v. 17, no. 2, p. 279-292, http://dx.doi.org/10.1007/s10592-015-0780-7.

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Year Published: 2016

Compact development and VMT: environmental determinism, self-selection, or some of both?

There is a long-running debate in the planning literature about the effects of the built environment on travel behavior and the degree to which apparent effects are due to the tendency of households to self-select into neighborhoods that reinforce their travel preferences. Those who want to walk will choose walkable neighborhoods, and those who...

Ewing, Reid; Hamidi, Shima; Grace, James B.
Ewing, R., Hamidi, S., and Grace, J.B., 2016, Compact development and VMT-- Environmental determinism, self-selection, or some of both? Environment and Planning B: Planning and Design, vol. 43 no. 4 737-755 http://dx.doi.org/10.1177/0265813515594811.

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Year Published: 2016

Defining the next generation modeling of coastal ecotone dynamics in response to global change

Coastal ecosystems are especially vulnerable to global change; e.g., sea level rise (SLR) and extreme events. Over the past century, global change has resulted in salt-tolerant (halophytic) plant species migrating into upland salt-intolerant (glycophytic) dominated habitats along major rivers and large wetland expanses along the coast. While...

Jiang, Jiang; DeAngelis, Donald L.; Teh, Su-Y; Krauss, Ken W.; Wang, Hongqing; Haidong, Li; Smith, Thomas; Koh, Hock L.
Jiang, J., DeAngelis, D.L., Teh, S.-Y., Krauss., K.W., Wang, H., Li, H., Smith, T.J., III, and Koh, H.-L., 2015, Defining the next generation modeling of coastal ecotone dynamics in response to global change: Ecological Modelling, Online Early, http://dx.doi.org/10.1016/j.ecolmodel.2015.04.013.  

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Year Published: 2015

The Gulf Coast Vulnerability Assessment: Mangrove, Tidal Emergent Marsh, Barrier Islands, and Oyster Reef

Climate, sea level rise, and urbanization are undergoing unprecedented levels of combined change and are expected to have large effects on natural resources—particularly along the Gulf of Mexico coastline (Gulf Coast). Management decisions to address these effects (i.e., adaptation) require an understanding of the relative vulnerability of...

Watson, Amanda; Reece, Joshua S.; Tirpak, Blair; Edwards, Cynthia Kallio; Geselbracht, Laura; Woodrey, Mark; LaPeyre, Megan K.; Dalyander, P. Soupy
Watson, A., Reece, J., Tirpak, B.E., Edwards, C.K., Geselbracht, L., Woodrey, M., LaPeyre, M.K., and Dalyander, P.A., 2015, The Gulf Coast Vulnerability Assessment: Mangrove, Tidal Emergent Marsh, Barrier Islands, and Oyster Reef: Gulf Coast Prairie Landscape Conservation Cooperative, 132 p., http://gulfcoastprairielcc.org/science/science-projects/gulf-coast-vulnerability-assessment/ or http://gulfcoastprairielcc.org/media/28946/gcva_11022015_final.pdf.

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Year Published: 2015

Dynamic reserve design in the face of climate change and urbanization

Reserve design is a process that must address many ecological, social, and political factors to successfully identify parcels of land in need of protection to sustain wildlife populations and other natural resources. Making land acquisition choices for a large, terrestrial protected area is difficult because it occurs over a long timeframe and may...

Romañach, Stephanie; Johnson, Fred A.; Stith, Bradley M.; Bonneau, Mathieu
Romanach, S.S., Johnson, F.A., Stith, B.M., and Bonneau, M., 2015, Dynamic reserve design in the face of climate change and urbanization: U.S. Geological Survey and North Carolina State University, Southeast Climate Science Center, https://globalchange.ncsu.edu/secsc/projects/dynamic-reserve-design-in-the-face-of-climate-change-and-urbanization/.

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Year Published: 2015

Final project memorandum: sea-level rise modeling handbook: resource guide for resource managers, engineers, and scientists

Coastal wetlands of the Southeastern United States are undergoing retreat and migration from increasing tidal inundation and saltwater intrusion attributed to climate variability and sea-level rise. Much of the literature describing potential sea-level rise projections and modeling predictions are found in peer-reviewed academic journals or...

Doyle, Thomas W.
Doyle, T.W., 2015, Final project memorandum: sea-level rise modeling handbook: resource guide for resource managers, engineers, and scientists: U.S. Geological Survey, Southeast Climate Science Center Project, 8 p., https://www.sciencebase.gov/catalog/item/560c29c2e4b058f706e540f9.

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Year Published: 2015

Crocodylus acutus (American Crocodile). Long distance juvenile movement

Crocodylus acutus (American Crocodile) is the most widely distributed New World crocodilian species with its range extending from Peru in the south to the southern tip of peninsular Florida in the north. Crocodylus acutus occupies primarily coastal brackish water habitat, however it also occurs in freshwater to hypersaline habitats (Thorbjarnarson...

Crespo, Rafael; Beauchamp, Jeffrey S.; Mazzotti, Frank; Cherkiss, Michael S.
Crespo, R., Beauchamp, J., Mazzotti, F., and Cherkiss, M.S., 2015, Crocodylus acutus (American Crocodile). Long distance juvenile movement: Herpetological Review, v. 46, no. 4, p. 623-624.

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Year Published: 2015

A spatial individual-based model predicting a great impact of copious sugar sources and resting sites on survival of Anopheles gambiae and malaria parasite transmission

BackgroundAgent-based modelling (ABM) has been used to simulate mosquito life cycles and to evaluate vector control applications. However, most models lack sugar-feeding and resting behaviours or are based on mathematical equations lacking individual level randomness and spatial components of mosquito life. Here, a spatial individual-based model (...

Zhu, Lin; Qualls, Whitney A.; Marshall, John M; Arheart, Kris L.; DeAngelis, Donald L.; McManus, John W.; Traore, Sekou F.; Doumbia, Seydou; Schlein, Yosef; Muller, Gunter C.; Beier, John C.
Zhu, L., Qualls, W.A., Marshall, J.M., Arheart, K.L., DeAngelis, D.L., McManus, J.W., Traore, S.F., Doumbia, S., Schlein, Y., Műller, G.C., and Beier, J.C., 2015, A spatial individual-based model predicting a great impact of copious sugar sources and resting sites on survival of Anopheles gambiae and malaria parasite transmission: Malaria Journal, v. 14, no. 59, 15 p., http://dx.doi.org/10.1186/s12936-015-0555-0.

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Year Published: 2015

Occupancy estimation for rare species using a spatially-adaptive sampling design

Summary 1. Spatially clustered populations create unique challenges for conservation monitoring programmes. Advances in methodology typically are focused on either the design or the modelling stage of the study but do not involve integration of both. 2. We integrate adaptive cluster sampling and spatial occupancy modelling by developing two models...

Pacifici, Krishna; Reich, Brian J.; Dorazio, Robert; Conroy, Michael J.
Pacifici, K., Reich, B.J., Dorazio, R.M., and Conroy, M.J., 2015, Occupancy estimation for rare species using a spatially-adaptive sampling design: Methods in Ecology and Evolution, Early View, http://dx.doi.org/10.1111/2041-210X.12499.