Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 239
Date published: April 7, 2016
Status: Active

Surface Elevation Vulnerability of Coastal Forested Wetlands to Sea-Level Rise

Wetlands vary in their abilities to keep up with sea-level rise; they either adjust vertically and/or move inland. USGS is working with partners around the world to measure rates of surface elevation change relative to local sea-level rise. 

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. 

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. 

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.

Date published: April 6, 2016

Sediment and Nutrient Retention by Wetlands Receiving Inflows from a Mississippi River Diversion: A Mass Balance Approach

Diversions are currently used in the Mississippi River to stimulate delta growth via increased sediment supply. This technique may also help to reduce nutrient loads before its discharged into the ocean. Scientists at USGS assess how wetlands retain the sediment and nutrients that come from these diversions. 

Date published: April 5, 2016
Status: Active

Genetic Analysis of Wild and Captive Black Carp in the Mississippi River Basin

Black carp have likely been present in the Mississippi River since the 1990s, but their current distribution and spread is not well understood. Genetics is helping to shed light on this species, including its diversity, the relatedness of wild and captive fish, and its introduction history. 

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. 

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. 

Date published: March 22, 2016
Status: Active

Mechanisms of Coastal Marsh Elevation Regulation

Sediment deposition serves an important role in the long-term maintenance of coastal marshes. USGS investigates the mechanisms of coastal marsh elevation regulation to help predict marsh sediment requirements under various sea level rise scenarios. 

Date published: March 18, 2016
Status: Active

Green-Tree Reservoir management practices within the U.S. Fish and Wildlife Service National Wildlife Refuge System

Green-Tree Reservoirs are used as a management tool by National Wildlife Refuges throughout the Southeast United States, but data suggests that forest productivity has declined in these areas. USGS investigates the effects of climate and flooding on tree growth and mortality to assist refuge managers adapt management strategies. 

Contacts: Richard Day
Date published: March 18, 2016
Status: Active

Establishing Explicit Biological Objectives to Guide Strategic Habitat Conservation for the Gulf Coast

To inform conservation efforts for the Gulf Coast, USGS is developing a suite of decision support tools to provide explicit population and habitat objectives.

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
Filter Total Items: 4,614
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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

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.

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Year Published: 2020

Modeling soil porewater salinity in mangrove forests (Everglades, Florida, USA) impacted by hydrological restoration and a warming climate

Hydrology is a critical driver controlling mangrove wetlands structural and functional attributes at different spatial and temporal scales. Yet, human activities have negatively affected hydrology, causing mangrove diebacks and coverage loss worldwide. In fact, the assessment of mangrove water budgets, impacted by natural and human disturbances,...

Zhao, Xiaochen; Rivera-Monroy, Victor H.; Wang, Hongqing; Xue, Zuo; Tsai, Cheng-Feng; Willson, C. S.; Castañeda-Moya, E.; Twilley, Robert R.

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Year Published: 2020

Total water level data from the January and March 2018 nor’easters for coastal areas of New England

During winter 2017–18 coastal areas of New England were impacted by the January 4, and March 2–4, 2018, nor’easters. The U.S. Geological Survey (USGS), under an interagency agreement with the Federal Emergency Management Agency (FEMA), collected total water level data (the combination of tide, storm surge, wave runup and setup, and freshwater...

Bent, Gardner C.; Taylor, Nicholas J.
Bent, G.C., and Taylor, N.J., 2020, Total water level data from the January and March 2018 nor’easters for coastal areas of New England: U.S. Geological Survey Scientific Investigations Report 2020–5048, 47 p., https://doi.org/10.3133/sir20205048.

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Year Published: 2020

Occurrence and spatiotemporal dynamics of pharmaceuticals in a temperate-region wastewater effluent-dominated stream: Variable inputs and differential attenuation yield evolving complex exposure mixtures

Effluent-dominated streams are becoming increasingly common in temperate regions and generate complex pharmaceutical mixture exposure conditions that may impact aquatic organisms via drug–drug interactions. Here, we quantified spatiotemporal pharmaceutical exposure concentrations and composition mixture dynamics during baseflow conditions at four...

Zhi, Hui; Kolpin, Dana W.; Klaper, R.D.; Iwanowicz, Luke R.; Meppelink, Shannon M.; LeFevre, Gregory H.

Filter Total Items: 216
Dauphin Island, Alabama
December 31, 2005

Dauphin Island, Alabama

Dauphin Island, Alabama. Three-dimensional views of island topography (A-C), post-Katrina oblique aerial photograph (D), and differences in topography from Hurricanes Ivan (E) and Katrina (F). The view is along the island, looking from east to west, with the Gulf of Mexico to the left and Mississippi Sound to the right. Lidar elevation images (A-C) show elevations above

...
Image: Decorah, Iowa
September 20, 2005

Decorah, Iowa

Views, looking west, to downtown Decorah, Iowa, from a city park bluff on east side of town.  Downtown courthouse tower and church spires are prominent.

Image: Decorah, Iowa
September 20, 2005

Decorah, Iowa

Views, looking west, to downtown Decorah, Iowa, from a city park bluff on east side of town.  Downtown courthouse tower and church spires are prominent.  

 

Image: Decorah, Iowa
September 20, 2005

Decorah, Iowa

Views, looking west, to downtown Decorah, Iowa, from a city park bluff on east side of town.  Downtown courthouse tower and church spires are prominent.  

 

Satellite image showing damage from Katrina.
September 5, 2005

Hurricane Katrina - Before and After in New Orleans

These Landsat images show the damage that New Orleans, Louisiana, received as a result of Hurricane Katrina.

A picture of a future development billboard
July 1, 2002

A future development billboard in an abandoned agriculture field

A future development billboard showing plots available. In the background there is an abandoned agriculture field. The picture was taken in Iowa during a Land Cover Trends field trip.

Picture of a road with setting sun
July 1, 2002

Road shot with setting sun in Iowa

A road shot with the setting sun in the background. The photograph was taken on a Land Cover Trends field trip in Iowa.

A customized extraction system used for the collection and extraction of large volumes of water in the Chesapeake Bay watershed
January 1, 0000

A customized extraction system used for collection and extraction

Environmental Chemistry Laboratory — Columbia, Missouri. Customized extraction system

Image: New Map Turtle in Louisiana and Mississippi

New Map Turtle in Louisiana and Mississippi

USGS researchers discovered a new species of turtle. The Pearl River map turtle makes its home in the Pearl River of Louisiana and Mississippi.

Image: Studying Louisiana Marshland

Studying Louisiana Marshland

Dr. Lee Foote, National Wetlands Research Center, studies a Louisiana marshland.

Filter Total Items: 255
USGS
March 30, 2007

The U.S. Geological Survey released a report today that presents information on streamflow and nutrient delivery from the Mississippi River Basin to the northern Gulf of Mexico. Scientists have linked the delivery of nutrients and streamflow to the formation and extent of a “hypoxic zone”

USGS
October 12, 2006

Scientists from the U.S. Geological Survey (USGS) released new data that illustrate the arrival of the massive dome of flood water that inundated much of southwest coastal Louisiana just before, during and after landfall of Hurricane Rita last fall.

USGS science for a changing world logo
October 12, 2006

Scientists from the U.S. Geological Survey (USGS) released new data that illustrate the arrival of the massive dome of flood water that inundated much of southwest coastal Louisiana just before, during and after landfall of Hurricane Rita last fall. 

USGS
October 3, 2006

A new peer-reviewed analysis of land change data from the U.S. Geological Survey’s National Wetlands Research Center indicates that 217 square miles of Louisiana’s coastal lands were transformed to water after Hurricanes Katrina and Rita. 

USGS science for a changing world logo
October 3, 2006

A new peer-reviewed analysis of land change data from the U.S. Geological Survey’s National Wetlands Research Center indicates that 217 square miles of Louisiana’s coastal lands were transformed to water after Hurricanes Katrina and Rita. 

USGS
September 27, 2006

A team of 45 U.S. Geological Survey scientists has received a 2006 Service to America Medal for their search and rescue work in the aftermath of Hurricane Katrina.

The scientists, led by Thomas Casadevall, USGS regional director in Denver, Colo., are from the USGS National Wetlands Research Center in Lafayette, La., and the USGS Louisiana Water Science Center in Baton Rouge, La.

USGS science for a changing world logo
September 7, 2006

The U.S. Geological Survey (USGS), in cooperation with the City of Kansas City, Missouri Water services Department, today released a report detailing the detection of prescription drugs, household and commercial cleaning compounds, pesticides and other chemicals in the Blue River Basin, situated in Missouri and Kansas.

USGS
September 7, 2006

The U.S. Geological Survey (USGS), in cooperation with the City of Kansas City, Missouri Water services Department, today released a report detailing the detection of prescription drugs, household and commercial cleaning compounds, pesticides and other chemicals in the Blue River Basin, situated in Missouri and Kansas.

USGS
September 6, 2006

How good (or bad) is the water quality in Blue River and Brush Creek?

The answer depends on when and where you are in the basin. Results from the most comprehensive water-quality study to date will be unveiled Thursday, Sept. 7, by scientists from the U.S. Geological Survey (USGS) and officials from the Kansas City, Mo. Water Services Department.

USGS science for a changing world logo
August 8, 2006

A report published by the U.S. Geological Survey (USGS) contains a regional map and an associated database that inventory 36 locations of reported natural asbestos and fibrous amphibole occurrences in the central United States.

USGS
June 5, 2006

Today, June 5, 2006, the U.S. Geological Survey (USGS) announces the recipients of the third year of the Mineral Resources External Research Program, a grant and/or cooperative agreement opportunity designed to support minerals research. 

USGS
June 1, 2006

As another potentially busy hurricane season approaches, U.S. Geological Survey (USGS) scientists are sharing data and photos with the public to stress the importance of evacuation and storm preparedness.