Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 237
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
Date published: March 18, 2016

Long-Term Carbon Burial in Marshes of the Mississippi River Delta

Wetlands along the Gulf of Mexico coast play an important role in the global carbon cycle, but as they  rapidly convert to open water, their potential for carbon storage is declining. USGS is working to provide accurate, long-term marsh soil carbon sequestration rates. 

Date published: March 18, 2016
Status: Active

Classifying Coastal Wetland Vegetation Communities with Unsupervised Artificial Neural Networks

Wetlands are often classified by their vegetation, which can help scientists track how these landscapes change over time. USGS turns to unsupervised artificial neural networks to help guide this classification process.

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Year Published: 2020

Unfamiliar territory: Emerging themes for ecological drought research and management

Novel forms of drought are emerging globally, due to climate change, shifting teleconnection patterns, expanding human water use, and a history of human influence on the environment that increases the probability of transformational ecological impacts. These costly ecological impacts cascade to human communities, and understanding this changing...

Crausbay, Shelley D.; Betancourt, Julio L.; Bradford, John; Cartwright, Jennifer M.; Dennison, William C.; Dunham, Jason B.; Enquist, Carolyn Armstrong; Frazier, Abby G. ; Hall, Kimberly R.; Littell, Jeremy S.; Luce, Charlie H.; Palmer, Richard; Ramirez, Aaron R.; Rangwala, Imtiaz; Thompson, Laura; Walsh, Brianne M.; Carter, Shawn

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Year Published: 2020

Bisphenol A and 17α-ethinylestradiol-induced transgenerational gene expression differences in the brain–pituitary–testis axis of medaka, Oryzias latipes

Endocrine disrupting chemicals (EDCs), such as bisphenol A (BPA) and 17α-ethinylestradiol (EE2), can have far reaching health effects, including transgenerational abnormalities in offspring that never directly contacted either chemical. We previously reported reduced fertilization rates and embryo survival at F2 and F3 generations caused by 7-day...

Thayil, Albert J.; Wang, Xuegeng; Bhandari, Pooja; vom Saal, Frederick S.; Tillitt, Donald E.; Bhandari, Ramji K.

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Year Published: 2020

Using boosted regression tree models to predict salinity in Mississippi embayment aquifers, central United States

High salinity limits groundwater use in parts of the Mississippi embayment. Machine learning was used to create spatially continuous and three‐dimensional predictions of salinity across drinking‐water aquifers in the embayment. Boosted regression tree (BRT) models, a type of machine learning, were used to predict specific conductance (SC) and...

Knierim, Katherine J.; Kingsbury, James A.; Haugh, Connor J.; Ransom, Katherine Marie

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Year Published: 2020

Effects of water level alteration on carbon cycling in peatlands

Globally, peatlands play an important role in the carbon (C) cycle. High water level is a key factor in maintaining C storage in peatlands, but water levels are vulnerable to climate change and anthropogenic disturbance. This review examines literature related to the effects of water level alteration on C cycling in peatlands to summarize new...

Zhong, Yehui; Ming, Jiang; Middleton, Beth

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Year Published: 2020

Endocrine disrupting activities and geochemistry of water resources associated with unconventional oil and gas activity

The rise of hydraulic fracturing and unconventional oil and gas (UOG) exploration in the United States has increased public concerns for water contamination induced from hydraulic fracturing fluids and associated wastewater spills. Herein, we collected surface and groundwater samples across Garfield County, Colorado, a drilling-dense region, and...

Kassotis, Christopher D.; Harkness, Jennifer S.; Vo, Phuc H.; Vu, Danh C.; Hoffman, Kate; Cinnamon, Katelyn M.; Cornelius-Green, Jennifer N.; Vengosh, Avner; Lin, Chung-Ho; Tillitt, Donald E.; Kruse, Robin L.; McElroy, Jane A.; Nagel, Susan C.

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Year Published: 2020

A global biophysical typology of mangroves and its relevance for ecosystem structure and deforestation

Mangrove forests provide many ecosystem services but are among the world’s most threatened ecosystems. Mangroves vary substantially according to their geomorphic and sedimentary setting; while several conceptual frameworks describe these settings, their spatial distribution has not been quantified. Here, we present a new global mangrove...

Thorley, Julia; Worthington, Thomas A.; zu Ermgassen, Philine S.E.; Friess, Daniel A.; Krauss, Ken; Lovelock, Catherine E.; Tingey, Rick; Woodroffe, Colin D.; Bunting, Pete; Cormier, N.; Lagomasino, David; Lucas, Richard; Murray, Nicholas J.; Sutherland, William J.; Spalding, Mark

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Year Published: 2020

Genetic diversity targets and indicators in the CBD post-2020 Global Biodiversity Framework must be improved

The 196 parties to the Convention on Biological Diversity (CBD) will soon agree to a post-2020 global framework for conserving the three elements of biodiversity (genetic, species, and ecosystem diversity) while ensuring sustainable development and benefit sharing. As the most significant global conservation policy mechanism, the new CBD framework...

Hoban, Sean M.; Bruford, Michael W.; D'Urban Jackson, Josephine; Lopes-Fernandes, Margarida; Heuertz, Myriam; Hohenlohe, Paul A.; Sjögren-Gulve, Per; Segelbacher, Gernot; Vernesi, Cristiano; Aitken, Sally; Bertola, Laura D.; Bloomer, Paulette; Breed, Martin; Rodríguez-Correa, Hernando; Funk, W. Chris; Grueber, Catherine E.; Hunter, Margaret; Jaffe, Rodolfo; Liggins, Libby; Mergeay, Joachim; Moharrek, Farideh; O'Brien, David; Ogden, Rob; Palma-Silva, Clarisse; Paz-Vinas, Ivan; Pierson, Jennifer; Ramakrishnan, Uma; Simo-Droissart, Murielle; Tani, Naoki; Waits, Lisette; Laikre, Linda

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Year Published: 2020

Use of environmental DNA to detect grass carp spawning events

The timing and location of spawning events are important data for managers seeking to control invasive grass carp populations. Ichthyoplankton tows for grass carp eggs and larvae can be used to detect spawning events; however, these samples can be highly debris-laden, and are expensive and laborious to process. An alternative method, environmental...

Hayer, Cari-Ann; Bayless, Michael F.; George, Amy E.; Thompson, Nathan; Richter, Catherine A.; Chapman, Duane C.

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Year Published: 2020

Acute and chronic toxicity of nickel and zinc to a laboratory cultured mayfly (Neocloeon triangulifer) in aqueous but fed exposures

Aquatic insects are poorly represented in water quality criteria, and previous studies have suggested a lack of sensitivity in acute toxicity tests despite observational studies demonstrating the contrary. Our objectives were to determine the toxicity of nickel (Ni) and zinc (Zn) to the mayfly Neocloeon triangulifer in fed acute (96-h)...

Soucek, David J.; Dickinson, Amy; Schlekat, Christan E.; Van Genderen, Eric; Hammer, Edward J.

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Year Published: 2020

Pesticides and their degradates in groundwater reflect past use and current management strategies, Long Island, New York, USA

Long Island, New York, has a mix of urban/suburban to agricultural/horticultural land use and nearly 3 million residents that rely on a sole-source aquifer for drinking water. The analysis of shallow groundwater (<40 m below land surface) collected from 54 monitoring wells across Long Island detected 53 pesticides or pesticide degradates....

Fisher, Irene; Phillips, Patrick J.; Bayraktar, Banu; Chen, Shirley; McCarthy, Brendan A.; Sandstrom, Mark W.

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Year Published: 2020

Mangrove blue carbon in the face of deforestation, climate change, and restoration

Coastal wetlands have disproportionately high carbon densities, known as blue carbon, compared to most terrestrial ecosystems. Mangroves and their blue carbon stocks are at risk globally from land‐use and land‐cover change (LULCC) activities such as aquaculture, alongside biophysical disturbances such as sea‐level rise and cyclones. Global...

Friess, Daniel A.; Krauss, Ken; Taillardat, Pierre; Adame, Maria Fernanda; Yando, Erik S.; Cameron, Clint; Sasmito, Sigit D.; Sillanpaa, Meriadec

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Year Published: 2020

Trait‐based variation in host contribution to pathogen transmission across species and resource supplies

Two key knowledge gaps currently limit the development of more predictive and general models of pathogen transmission: (1) the physiological basis of heterogeneity in host contribution to pathogen transmission (reservoir potential) remains poorly understood, and (2) a general means of integrating the ecological dynamics of host communities has yet...

Welsh, Miranda E; Cronin, James P.; Mitchell, Charles E.

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.