Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 238
Date published: December 20, 2016
Status: Completed

Bats in Forests Managed for Wildlife

The Challenge: Within the Mississippi Alluvial Valley (MAV), forest managers may prescribe variable retention silvicultural treatments within bottomland hardwood forests on public lands to improve forest conditions (i.e., structural heterogeneity, species composition, and senescence) for priority wildlife species. This is referred to as wildlife-forestry silviculture. However, concerns have...

Date published: December 13, 2016

Mississippi Alluvial Plain (MAP): Water Availability Study

The Mississippi Alluvial Plain is one of the most productive agricultural regions in the Nation and depends on groundwater for irrigation. The MAP area constitutes the third largest area of irrigated cropland in the United States. The area is approximately 29,000 square miles (19 million acres) and includes parts of the States...

Contacts: Wade Kress
Date published: September 29, 2016
Status: Active

Structure maps of the Carrizo-Wilcox aquifer in northwestern Louisiana

Groundwater resources in northwestern Louisiana may be needed for development of natural gas production from the Haynesville Shale. Use of groundwater for hydro-fracturing of the shale may lower water levels and alter groundwater flow directions in the Carrizo-Wilcox aquifer and other local aquifers. Regional maps of aquifers in northwestern Louisiana are unavailable. The LaWSC, in cooperation...

Date published: September 26, 2016

Hurricane Information

Hurricanes bring destructive winds, storm surge, torrential rain, flooding, and tornadoes. A single storm can wreak havoc on coastal and inland communities and on natural areas over thousands of square miles. In 2005, Hurricanes Katrina, Rita, and Wilma demonstrated the devastation that hurricanes can inflict and the importance of hurricane hazards research and preparedness.

More than...

Date published: September 26, 2016
Status: Active

Lower Tennessee River (LTEN) Basin Study

Welcome....the Lower Tennessee River Basin in Tennessee, Alabama, Georgia, Kentucky, and Mississippi is one of the 59 study units that are part of the U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program.The long-term goals of this program are to describe the status and trends in the quality of a large, representative part of the Nation's surface- and ground-water...

Date published: September 15, 2016

Ozark Groundwater Availability Study

The U.S. Geological Survey's Groundwater Resources Program (GWRP) is conducting an assessment of groundwater availability throughout the United States to gain a better understanding of the status of the Nation's groundwater resources and how changes in water use and climate may affect those resources. Assessments will be completed for the Nation's principal aquifer systems to help characterize...

Contacts: Brian R Clark
Date published: August 30, 2016
Status: Active

Developing Techniques for Estimating Nutria (Myocastor coypus) Abundance

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.

Date published: August 29, 2016
Status: Active

Poisoning of Migratory Birds at Contaminated Sites

The Challenge: The Department of the Interior (DOI) and the National Oceanic & Atmospheric Administration are trustees for a wide variety natural resources that belong to all Americans. Additional natural resources are overseen by Native American tribes, states, and other federal agencies. Migratory birds are an example of a trust species for DOI, under the US Fish and Wildlife Service....

Date published: August 25, 2016

Movement of Maculata Applesnails in Southern Louisiana Swamps

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.

Date published: July 26, 2016
Status: Active

HDgov: Multi-agency Website for Human Dimensions of Natural Resources

HDgov is an interactive and mobile-responsive online portal to interagency, academic, and non-government resources focused on the human dimensions of natural resource management. The web portal provides easy access to tools, publications, data, and methods that help ensure that the people side of natural resources is considered throughout the entire natural resource management process. The...

Date published: July 26, 2016
Status: Active

National Park Service Visitor Spending Effects

The National Park Service (NPS) manages the Nation’s most iconic destinations that attract millions of visitors from across the Nation and around the world. Trip-related spending by NPS visitors generates and supports a considerable amount of economic activity within park gateway communities. USGS economists collaborate with the National Park Service social science program to estimate NPS...

Date published: July 21, 2016
Status: Active

Using Quantile Regression to Investigate Ecological Limiting Factors

Unexplained heterogeneity in statistical models of animal responses to their physical environment is reasonable to expect because the measured habitat resources are a constraint on—but not the sole determinant of—abundance, survival, fecundity, or fitness. The ecological understanding and reliability of management predictions based on animal habitat models can be improved by shifting focus ...

Filter Total Items: 4,537
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Year Published: 2020

Metamorphosis and the impact of contaminants on ecological subsidies

Animals with complex life histories such as aquatic insects and amphibians link freshwater and terrestrial ecosystems when they transition from water to land during development. This transition requires metamorphosis from juvenile to adult life stages. Metamorphosis is a stressful and ecologically sensitive life history event. Exposure to...

Wesner, Jeff; Kraus, Johanna M.; Henry, Brianna L.; Kerby, Jacob
Wesner, J., Kraus, J.M., Henry, B., and Kerby, J., 2020, Metamorphosis and the impact of contaminants on ecological subsidies, in Kraus, J.M., Walters, D.M., and Mills, M.A., eds., Contaminants and Ecological Subsidies: The Land-Water Interface: Cham, Springer International Publishing, p. 111-125. https://doi.org/10.1007/978-3-030-49480-3_6

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Year Published: 2020

Introduction: Ecological subsidies as a framework for understanding contaminant fate, exposure, and effects at the land-water interface

Ecologists have long recognized that ecological subsidies (the flow of organic matter, nutrients, and organisms between ecosystems) can strongly affect ecosystem processes and community structure in the recipient ecosystem. Animal movements, organic matter flows, and food web dynamics between linked aquatic and terrestrial systems can also...

Walters, David; Kraus, Johanna M.; Mills, Marc A.

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Year Published: 2020

Practical considerations for the incorporation of insect-mediated contaminant flux into ecological risk assessments

Insect-mediated contaminant flux is truly an interdisciplinary concept that merges ideas from many technical areas of science (e.g., environmental chemistry, landscape ecology, and entomology). This chapter introduces risk assessors to this emerging and ecologically relevant concept by distilling the main mechanisms that drive insect-mediated...

Otter, Ryan R.; Beaubien, Gale B.; Olson, Connor I.; Walters, David; Mills, Marc A.
Otter, R.R., Beaubien, G.B., Olson, C.I., Walters, D.M., and Mills, M.A., 2020, Practical considerations for the incorporation of insect-mediated contaminant flux into ecological risk assessments, in Kraus, J.M., Walters, D.M., and Mills, M.A., eds., Contaminants and Ecological Subsidies: The Land-Water Interface: Cham, Springer International Publishing, p. 179-195. https://doi.org/10.1007/978-3-030-49480-3_9

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Year Published: 2020

Synthesis: A framework for predicting the dark side of ecological subsidies

In this chapter, we synthesize the state of the science regarding ecological subsidies and contaminants at the land-water interface and suggest research and management approaches for linked freshwater-terrestrial ecosystems. Specifically, we focus on movements of animals with complex life histories and the detrital inputs associated with animal...

Kraus, Johanna M.; Wessner, Jeff; Walters, David
Kraus, J.M., Wesner, J., and Walters, D.M., 2020, Synthesis: A framework for predicting the dark side of ecological subsidies, in Kraus, J.M., Walters, D.M., and Mills, M.A., eds., Contaminants and Ecological Subsidies: The Land-Water Interface: Cham, Springer International Publishing, p. 343-372. https://doi.org/10.1007/978-3-030-49480-3_14

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Year Published: 2020

Cross-ecosystem linkages and trace metals at the land-water interface

At low concentrations, trace metals are critical for sustaining life on Earth. However, at high concentrations, they become a global contaminant with particularly strong effects on freshwater communities. These effects can propagate to terrestrial ecosystems in part by altering production and community structure of adult aquatic insect emergence...

Kraus, Johanna M.; Pomeranz, Justin F.
Kraus, J.M., and Pomeranz, J.P.F., 2020, Cross-ecosystem linkages and trace metals at the land-water interface, in Kraus, J.M., Walters, D.M., and Mills, M.A., eds., Contaminants and Ecological Subsidies: The Land-Water Interface: Cham, Springer International Publishing, p. 91-109. https://doi.org/10.1007/978-3-030-49480-3_5

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Year Published: 2020

Estimating flood magnitude and frequency on streams and rivers in Connecticut, based on data through water year 2015

The U.S. Geological Survey, in cooperation with the Connecticut Department of Transportation, updated flood-frequency estimates with 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (2-, 5-, 10-, 25-, 50-, 100-, 200-, and 500-year recurrence intervals, respectively) for 141 streamgages in Connecticut and 11...

Ahearn, Elizabeth A.; Hodgkins, Glenn A.
Ahearn, E.A., and Hodgkins, G.A., 2020, Estimating flood magnitude and frequency on streams and rivers in Connecticut, based on data through water year 2015: U.S. Geological Survey Scientific Investigations Report 2020–5054, 42 p., https://doi.org/10.3133/sir20205054.

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Year Published: 2020

Effects of early life stage exposure of largemouth bass to atrazine or a model estrogen (17α-ethinylestradiol)

Endocrine disrupting contaminants are of continuing concern for potentially contributing to reproductive dysfunction in largemouth and smallmouth bass in the Chesapeake Bay watershed (CBW) and elsewhere. Exposures to atrazine (ATR) have been hypothesized to have estrogenic effects on vertebrate endocrine systems. The incidence of intersex in male...

Leet, Jessica Kristin; Richter, Catherine A.; Cornman, Robert S.; Berninger, Jason P.; Bhandari, Ramji K.; Nicks, Diane K.; Zajicek, James L.; Blazer, Vicki S.; Tillitt, Donald E.

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Year Published: 2020

Distribution of selected hydrogeologic characteristics of the upper glacial and Magothy aquifers, Long Island, New York

The Pleistocene- and Cretaceous-age sediments underlying Long Island, New York, compose an important sole-source aquifer system that is nearly 2,000 feet thick in some areas. Sediment characteristics of importance for water supply include water-transmitting properties—horizontal and vertical hydraulic conductivity—and the distribution of lignite,...

Walter, Donald A.; Finkelstein, Jason S.
Walter, D.A., and Finkelstein, J.S., 2020, Distribution of selected hydrogeologic characteristics of the upper glacial and Magothy aquifers, Long Island, New York: U.S. Geological Survey Scientific Investigations Report 2020–5023, 21 p., https://doi.org/10.3133/sir20205023.

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Year Published: 2020

Changes in ecosystem nitrogen and carbon allocation with black mangrove (Avicennia germinans) encroachment into Spartina alterniflora salt marsh

Increases in temperature are expected to facilitate encroachment of tropical mangrove forests into temperate salt marshes, yet the effects on ecosystem services are understudied. Our work was conducted along a mangrove expansion front in Louisiana (USA), an area where coastal wetlands are in rapid decline due to compounding factors, including...

Macy, Aaron; Osland, Michael; Cherry, Julia A; Cebrian, Just

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Year Published: 2020

Growth rates for immature Kemp’s ridley sea turtles from a foraging area in the northern Gulf of Mexico

Examining vital rates helps clarify how environmental characteristics, biological resources and human activities affect population growth. Carapace lengths were gathered for 241 Kemp’s ridley Lepidochelys kempii sea turtles that were marked and recaptured (n = 23) between 2011 and 2019 at a foraging location in northwest Florida, USA....

Lamont, Margaret; Johnson, Darren

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Year Published: 2020

Improved prediction of management-relevant groundwater discharge characteristics throughout river networks

Groundwater discharge zones connect aquifers to surface water, generating baseflow and serving as ecosystem control points across aquatic ecosystems. The influence of groundwater discharge on surface flow connectivity, fate and transport of contaminants and nutrients, and thermal habitat depends strongly on hydrologic characteristics such as the...

Barclay, Janet R.; Starn, J. Jeffrey; Briggs, Martin A.; Helton, Ashley

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Year Published: 2020

Potentiometric surfaces, 2011–12, and water-level differences between 1995 and 2011–12, in wells of the “200-foot,” “500-foot,” and “700-foot” sands of the Lake Charles area, southwestern Louisiana

Water levels were determined in 90 wells to prepare 2011–12 potentiometric surfaces focusing primarily on the “200-foot,” 500-foot,” and “700-foot” sands of the Lake Charles area, which are part of the Chicot aquifer system underlying Calcasieu and Cameron Parishes of southwestern Louisiana. These three aquifers provided 34 percent of the total...

White, Vincent E.; Griffith, Jason M.
White, V.E., and Griffith, J.M., 2020, Potentiometric surfaces, 2011–12, and water-level differences between 1995 and 2011–12, in wells of the “200-foot,” “500-foot,” and “700-foot” sands of the Lake Charles area, southwestern Louisiana: U.S. Geological Survey Scientific Investigations Map 3460, 4 sheets, 11-p. pamphlet, http://dx.doi.org/10.3133/sim3460.

Filter Total Items: 220
Image: WRP Sabine Parish, Louisiana
May 6, 2012

WRP Sabine Parish, Louisiana

Wetlands Reserve Program site in Sabine Parish, Louisiana.  Landowner restored his often-flooded cattle pasture to its natural wetland state by creating shallow water areas, establishing food plots and pollinator plots, and installing wood duck nesting boxes.

Real-time Groundwater Streamgage equipment set up
June 15, 2011

Real-time Groundwater Streamgage equipment set up

Real-time Groundwater Streamgage equipment set up

Flood Diversion Measures Along the Lower Mississippi River
May 18, 2011

Flood Diversion Measures Along the Lower Mississippi River

Flood Diversion Measures Along the Lower Mississippi River

Image: USGS Measures Flooding in Louisiana
May 13, 2011

USGS Measures Flooding in Louisiana

USGS scientist Cindy Sibley looks at the rising waters on the Atchafalaya River Basin near Melville, La.

Image: USGS Measures Flooding in Louisiana
May 13, 2011

USGS Measures Flooding in Louisiana

USGS scientists Cindy Sibley and Mike Descant calibrate the water quality monitor on the Atchafalaya River Basin near Melville, La.

Image: USGS Measures Flooding in Louisiana
May 13, 2011

USGS Measures Flooding in Louisiana

USGS scientist Cindy Sibley prepares to take a water quality measurment on the Atchafalaya River Basin near Melville, La.

Image: USGS Measures Flooding in Louisiana
May 13, 2011

USGS Measures Flooding in Louisiana

USGS scientist Cindy Sibley prepares to take a water quality measurment on the Atchafalaya River Basin near Melville, La.

Image: USGS Measures Flooding in Louisiana
May 12, 2011

USGS Measures Flooding in Louisiana

USGS scientists Paul Frederick and Mike Descant prepare to take streamflow measurements on the the Mississippi River in Baton Rouge, La.

Image: USGS Measures Flooding in Louisiana
May 12, 2011

USGS Measures Flooding in Louisiana

USGS scientists Mike Descant and Cindy Sibley take water quality measurements on the Atchafalaya River Basin near Melville, La.

Image: USGS Measures Flooding in Louisiana
May 12, 2011

USGS Measures Flooding in Louisiana

USGS scientists Mike Descant and Cindy Sibley take water quality measurements on the Atchafalaya River Basin near Melville, La.

Image: USGS Measures Flooding in Louisiana
May 12, 2011

USGS Measures Flooding in Louisiana

USGS scientist Mike Descant takes water quality measurements on the Atchafalaya River Basin near Melville, La.

Filter Total Items: 253
USGS
July 19, 2012

Streamflow levels are below normal across much of the Midwest states of Iowa, Nebraska, Illinois and Wisconsin, according to the U.S. Geological Survey. Many states are experiencing severe drought, such as Iowa, where flows are less than 25 percent of normal streamflow conditions for the majority of the state. 

USGS
June 5, 2012

California, Louisiana and Mississippi join the more than 40 states covered by the US Topo
 

USGS
April 19, 2012

Acadiana!  Come celebrate 20 Years of Worldwide Wetlands Science at the U.S. Geological Survey National Wetlands Research Center (NWRC) during INNOV8’s first Earth Day Celebration on the Research Park of the University of Louisiana in Lafayette, La.

USGS
March 22, 2012

Assistance is needed from homeowners with abandoned or in-use water wells in Hot Springs, Ark. to voluntarily participate in a U.S. Geological Survey water resources study. 

USGS
March 15, 2012

The talents of local women depicting nature through their artwork will be showcased at the fifth annual Women's History Month exhibit. 

USGS
February 28, 2012

LAFAYETTE, La. — Artists of all ages are invited to display their talent in the National Women’s History Month art exhibition at the U.S. Geological Survey’s National Wetlands Research Center during March. 

USGS
February 27, 2012

A Faulkner County levee west of Conway, Ark. contains a mixture of sand, silt and clay, according to a recent U.S. Geological Survey study. 

USGS science for a changing world logo
December 1, 2011

More than 280 million acre-feet of groundwater has been withdrawn from the Mississippi embayment aquifer system between 1870-2007, according to a new water modeling tool developed by the U.S. Geological Survey.

USGS science for a changing world logo
November 7, 2011

The U.S. Geological Survey will be seeking permission from select local residents near Vienna, Mo. to conduct groundwater measurements in their domestic wells.

USGS scientists will be measuring water levels, which will be used to develop maps that will show groundwater flow directions in the area. 

USGS science for a changing world logo
August 29, 2011

Glyphosate, also known by its tradename Roundup, is commonly found in rain and rivers in agricultural areas in the Mississippi River watershed, according to two new USGS studies released this month. 

USGS science for a changing world logo
July 20, 2011

Flooding along the Missouri River continues as shown in Landsat satellite images of the Nebraska and Iowa border. Heavy rains and snowmelt have caused the river to remain above flood stage for an extended period.

USGS science for a changing world logo
June 10, 2011

High or low flood risks can determine where wetland restoration might occur on the lower Missouri River, according to a new study by the U.S. Geological Survey Columbia Environmental Research Center and the Nature Conservancy’s Missouri River Program.