Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 237
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 ...

Date published: July 21, 2016
Status: Active

North American Waterfowl Management Plan

The ultimate success of North American Waterfowl Management Plan (NAWMP) depends on maintaining relevance to stakeholders and society. In order to be relevant, a first step is to better understand what people value in regard to waterfowl and their habitats. 

Filter Total Items: 4,598
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Year Published: 2021

Stress gradients interact with disturbance to reveal alternative states in salt marsh: Multivariate resilience at the landscape scale

Stress gradients influence many ecosystem processes and properties, including ecosystem recovery from and resistance to disturbance. While recent analytical approaches have advanced multivariate metrics of ecosystem resilience that allow quantification of conceptual resilience models and identification of thresholds of state change, these...

Jones, Scott; Stagg, Camille; Yando, Erik S.; James, W. Ryan; Buffington, Kevin J.; Hester, Mark W.

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Year Published: 2021

Germination potential of baldcypress (Taxodium distichum) swamp soil seed bank along geographical gradients

Changing environments of temperature, precipitation and moisture availability can affect vegetation in ecosystems, by affecting regeneration from the seed bank. Our objective was to explore the responses of soil seed bank germination to climate-related environments along geographic gradients. We collected seed banks in baldcypress (Taxodium...

Lei, Ting; Middleton, Beth

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Year Published: 2021

Carrying capacity of spatially distributed metapopulations

Carrying capacity is a key concept in ecology. A body of theory, based on the logistic equation, has extended predictions of carrying capacity to spatially distributed, dispersing populations. However, this theory has only recently been tested empirically. The experimental results disagree with some theoretical predictions of when they are...

Zhang, Bo; DeAngelis, Don; Ni, Wei-Ming

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Year Published: 2021

Surface elevation change evaluation in mangrove forests using a low‐cost, rapid‐scan terrestrial laser scanner

Mangrove forests have adapted to sea level rise (SLR) increases by maintaining their forest floor elevation via belowground root growth and surface sediment deposits. Researchers use surface elevation tables (SETs) to monitor surface elevation change (SEC) in mangrove forests, after which this information is used to assess SLR resiliency or to...

Kargar, Ali Rouzbeh; MacKenzie, Richard A.; Fafard, Alexander; Krauss, Ken; van Aardt, Jan

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Year Published: 2021

Groundwater discharges as a source of phytoestrogens and other agriculturally derived contaminants to streams

Groundwater discharge zones in streams are important habitats for aquatic organisms. The use of discharge zones for thermal refuge and spawning by fish and other biota renders them susceptible to potential focused discharge of groundwater contamination. Currently, there is a paucity of information about discharge zones as a potential exposure...

Tyler J. Thompson; Briggs, Martin; Phillips, Patrick J.; Blazer, Vicki S.; Smalling, Kelly; Kolpin, Dana W.; Wagner, Tyler

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Year Published: 2021

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: 2021

How plants influence resilience of salt marsh and mangrove wetlands to sea-level rise

This review evaluates the importance of plants and associated biological processes in determining the vulnerability of coastal wetlands to sea-level rise. Coastal wetlands occur across a broad sedimentary continuum from minerogenic to biogenic, providing an opportunity to examine the relative importance of biological processes in wetland...

Cahoon, Donald R.; McKee, Karen L.; James Morris

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Year Published: 2021

Assessing the ecological risks of per‐ and polyfluoroalkyl substances: Current state‐of‐the science and a proposed path forward

Per‐ and poly‐fluoroalkyl substances (PFAS) encompass a large, heterogenous group of chemicals of potential concern to human health and the environment. Based on information for a few relatively well‐understood PFAS such as perfluorooctane sulfonate and perfluorooctanoate, there is ample basis to suspect that at least a subset can be considered...

Ankley, Gerald T.; Cureton, Philippa; Hoke, Robert A.; Houde, Magali; Kumar, Anupama; Kurias, Jessy; Lanno, Roman P.; McCarthy, Chris; Newsted, John L.; Salice, Christopher J.; Sample, Bradley E.; Sepúlveda, Maria S.; Steevens, Jeffery; Valsecchi, Sara

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Year Published: 2021

Resolving species boundaries in the critically imperiled freshwater mussel species, Fusconaia mitchelli (Bivalvia: Unionidae)

Species are a fundamental unit of biology, and defining accurate species boundaries is integral to effective conservation and management of imperiled taxa. Freshwater mussels (Bivalvia: Unionidae) are among the most imperiled groups of organisms in North America, yet species boundaries remain uncertain for many taxa. The False Spike, ...

Smith, Chase H.; Johnson, Nathan; Havlik, Kaitlyn; Doyle, Robert D.; Randklev, Charles R.

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Year Published: 2021

Status of the major aquaculture carps of China in the Laurentian Great Lakes Basin

There is concern of economic and environmental damage occuring if any of the four major aquacultured carp species of China, black carp Mylopharyngodon piceus, bighead carp Hypophthalmichthys nobilis, silver carp H. molitrix, or grass carp Ctenopharyngodon idella, were to establish in the Laurentian Great Lakes. All four are...

Chapman, Duane C.; Benscoter, Allison; Embke, Holly S.; King, Nicole R.; Kocovsky, Patrick; Lewis, Teresa D.; Mandrak, Nicholas E.

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Year Published: 2021

Elemental and radionuclide exposures and uptakes by small rodents, invertebrates, and vegetation at active and post-production uranium mines in the Grand Canyon watershed

The effects of breccia pipe uranium mining in the Grand Canyon watershed (Arizona) on ecological and cultural resources are largely unknown. We characterized the exposure of biota to uranium and co-occurring ore body elements during active ore production and at a site where ore production had recently concluded. Our results indicate that biota...

Cleveland, Danielle; Hinck, Jo Ellen; Lankton, Julia S.

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Year Published: 2021

Movement of synthetic organic compounds in the food web after the introduction of invasive quagga mussels (Dreissena bugensis) in Lake Mead, Nevada and Arizona, USA

Introductions of dreissenid mussels in North America have been a significant concern over the last few decades. This study assessed the distribution of synthetic organic compounds (SOCs) in the food web of Lake Mead, Nevada/Arizona, USA and how this distribution was influenced by the introduction of invasive quagga mussels. A clear spatial...

Goodbred, Steven L.; Rosen, Michael R.; Patino, Reynaldo; Alvarez, David; Echols, Kathy R.; King, Kerensa; Umek, John

Filter Total Items: 216
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.

Image: USGS Measures Flooding in Louisiana
May 12, 2011

USGS Measures Flooding in Louisiana

USGS scientists 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

The floodwaters rise on the Atchafalaya River Basin near Melville, La.

Filter Total Items: 255
USGS
August 21, 2012

New statistics on the use of water in Louisiana are presented in a recent report by the United States Geological Survey. 

USGS
July 23, 2012

At least one contaminant was found at levels of human-health concern in about one third of untreated groundwater samples collected from wells in the Cambrian-Ordovician aquifer system, according to a recent report by the U.S. Geological Survey.

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.