Unified Interior Regions

Region 4: Mississippi Basin

Regions L2 Landing Page Tabs

Filter Total Items: 238
Date published: April 11, 2016
Status: Active

Nonindigenous Aquatic Species (NAS) Program

Welcome to the Nonindigenous Aquatic Species (NAS) information resource for the United States Geological Survey. Located at Gainesville, Florida, this site has been established as a central repository for spatially referenced biogeographic accounts of introduced aquatic species. The program provides scientific reports, online/realtime queries, spatial data sets, distribution maps, and general...

Date published: April 8, 2016
Status: Active

Ecology of Greenhouse Gas Emissions from Coastal Wetlands

Wetlands have the potential to absorb large amounts of carbon dioxide via photosynthesis, and flooded soils have low oxygen levels which decrease rates of decomposition to promote the retention of soil carbon. However, the type of greenhouse gases emitted from wetlands varies by wetland type and soil condition. A suite of approaches are being used to assess  fluxes of greenhouses gases, like...

Date published: April 8, 2016
Status: Active

Modeling Tidal Freshwater Forested Wetlands (TFFW) Habitat Changes for Land Management

As tidal freshwater forested wetlands - TFFWs - are influenced by salinty due to salt water intrusion, they may experience changes in plant community composition, growth, and productivity. Models are needed to predict vegetation community change or dieback, as well as changes in carbon sequestration and storage due to changing climate, drought, changes in freshwater discharge, elevated carbon...

Date published: April 8, 2016
Status: Active

Modeling Landscape-Scale Habitat Relations for Landbirds During Migration: Science Support for the Gulf Coast Joint Venture

USGS uses weather surveillance radar data and landscape-scale habitat metrics to model bird-habitat connections along the western coast of the Gulf of Mexico.

Date published: April 8, 2016
Status: Active

Ecology of Tidal Freshwater Forested Wetlands of the Southeastern United States

Tidal freshwater forested wetlands - TFFWs - can be found in the upper intertidal areas of many estuaries and act as a transition between coastal marshes and bottomland hardwood wetlands. However, it is because of their location that makes them vulnerable to sea-level rise, and they are constantly transitioning to different wetland types. USGS addresses how various processes are affected in...

Date published: April 8, 2016
Status: Active

Restoration of Climate Change-Induced Retreat of Tidally Influenced Freshwater Forested Wetlands

Wetlands in river deltas - like the Mississippi River Delta Plain - may be more vulnerable to sea-level rise. Historically, coastal wetlands responded to these changes by increasing surface elevation or migrating up-slope. USGS conducts research to identify the biogeochemical influences on sediment addition in coastal wetland areas. 

Date published: April 8, 2016
Status: Active

RESTORE Science: Inventory of Gulf of Mexico Ecosystem Indicators Using an Ecological Resilience Framework

To effectively manage an ecosystem, resource managers need a way to evaluate its health and ability to function. Metrics that indicate ecosystem condition - or indicators - can be used to help determine how well management strategies work. 

Date published: April 8, 2016
Status: Active

Factors Controlling Resilience and Resistance of Coastal Salt Marshes to Sudden Marsh Dieback

Sudden Marsh Dieback - SMD - has been documented for the past two decades throughout coastal areas of the United States. With these large-scale diebacks comes the loss of ecosystem functions and services. USGS scientsts use field work and greenhouse studies to investigate the factors that control the resilience and resistance of coastal salt marshes to SMD. 

Date published: April 7, 2016
Status: Active

Integrated Modeling of Coastal Processes and Linkages to Management Applications

Coastal wetlands provide valuable ecosystem services such as wave attenuation, surge reduction, carbon sequestration, wastewater treatment, and critical habitats for endangered fish and wildlife species. However, wetland loss threatens the capacity of coastal wetlands to provide these ecosystem services.

Date published: April 7, 2016
Status: Active

Louisiana’s Coastwide Reference Monitoring System (CRMS)

The Coastwise Reference Monitoring System was designed to monitor the effectiveness of restoration actions at individual sites, as well as across the entire Louisiana coast. 

Contacts: Sarai Piazza
Date published: April 7, 2016
Status: Active

Influence of Sea-Level Rise on Wetland Vegetation Community Structure, Primary Productivity, Organic Matter Decomposition and Carbon Storage

This study will employ a space for time substitution to show long-term effects of rising sea-level and increasing salinity on vegetation community structure, primary production and decomposition. Productivity and decomposition rates will be estimated for four wetland plant community types defined by salinity zones and dominant plant species. 

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. 

Filter Total Items: 4,537
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Year Published: 2020

Salinity, water level, and forest structure contribute to baldcypress (Taxodium distichum) rhizosphere and endosphere community structure

As rising sea levels alter coastal ecosystems, there is a pressing need to examine the effects of saltwater intrusion on coastal communities. Using 16S Illumina profiling, we characterized the communities of baldcypress tree (Taxodium distichum) root endosphere and rhizosphere soil bacteria. Our study utilized established sites along salinity and...

Lumibao, Candice Y; Kimbrough, Elizabeth; Formel, Steven; Day, Richard; From, Andrew; Conner, William H.; Krauss, Ken; Van Bael, Sunshine A

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Year Published: 2020

A comparative phylogeographic approach to facilitate recovery of an imperiled freshwater mussel (Bivalvia: Unionida: Potamilus inflatus)

North American freshwaters are among the world’s most threatened ecosystems, and freshwater mussels are among the most imperiled inhabiting these systems. A critical aspect of conservation biology is delineating patterns of genetic diversity, which can be difficult when a taxon has been extirpated from a significant portion of its historical range...

Smith, Chase H.; Johnson, Nathan

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Year Published: 2020

Wastewater-based epidemiology pilot study to examine drug use in the Western United States

The extent of prescription and illicit drug abuse in geographically isolated rural and micropolitan communities in the intermountain western United States (US) has not been well tracked. The goal of this pilot study was to accurately measure drug dose consumption rates (DCR) between two select populations, normalize the data and compare the DCRs...

Bishop, Nicholas; Jones-Lepp, Tammy; Margetts, Miranda; Sykes, Jordan; Alvarez, David; Keil, Deborah

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Year Published: 2020

Comparative phylogenomics reveal complex evolution of life history strategies in a clade of bivalves with parasitic larvae (Bivalvia: Unionoida: Ambleminae)

Freshwater mussels are a species‐rich group with biodiversity patterns strongly shaped by a life history strategy that includes an obligate parasitic larval stage. In this study, we set out to reconstruct the life history evolution and systematics in a clade of freshwater mussels adapted to parasitizing a molluscivorous host fish. Anchored hybrid...

Smith, Chase H.; Pfeiffer, John M.; Johnson, Nathan

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Year Published: 2020

Preserving connectivity under climate and land-use change: No one-size-fits-all approach for focal species in similar habitats

Habitat connectivity is essential for maintaining populations of wildlife species, especially as climate changes. Knowledge about the fate of existing habitat networks in a changing climate and in light of land-use change is critical for determining which types of conservation actions must be taken to maintain those networks. However, information...

Costanza, Jennifer K.; Watling, James I.; Sutherland, Ron; Belyea, Curtis; Dilkina, Bistra; Cayton, Heather; Bucklin, David N.; Romanach, Stephanie; Haddad, Nick M.

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Year Published: 2020

Using NASA Earth observations and Google Earth Engine to map winter cover crop conservation performance in the Chesapeake Bay watershed

Winter cover crops such as barley, rye, and wheat help to improve soil structure by increasing porosity, aggregate stability, and organic matter, while reducing the loss of agricultural nutrients and sediments into waterways. The environmental performance of cover crops is affected by choice of species, planting date, planting method, nutrient...

Thieme, Alison; Yadav, Sunita; Oddo, Perry C.; Fitz, John M.; McCartney, Sean; King, LeeAnn; Keppler, Jason; McCarty, Gregory W.; Hively, W. Dean

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Year Published: 2020

Beloniformes: Belonidae (Needlefishes) and Hemiramphidae (Halfbeaks)

The order Beloniformes (or Synentognathi) contains two suborders, six families, 37 genera, and about 235 species of atherinomorph fishes (Rosen & Parenti 1981; Collette et al. 1984; Collette 2004). Features common to these fishes include dorsal and anal fins on the rear half of the body, abdominal pelvic fins with six soft rays, no fin spines...

Bruce B. Collette; Walsh, Stephen
Collette, B.B., and Walsh, S.J., 2020, Beloniformes: Belonidae (Needlefishes) and Hemiramphidae (Halfbeaks), Chapter 26, in Warren, M.L., Jr., and Burr, B.M., eds., Freshwater Fishes of North America, v. 2: Characidae to Poeciliidae, p. 449-462: Johns Hopkins University Press, https://jhupbooks.press.jhu.edu/title/freshwater-fishes-north-america/table-of-contents.

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Year Published: 2020

Methods to quality assure, plot, summarize, interpolate, and extend groundwater-level information—Examples for the Mississippi River Valley alluvial aquifer

Large-scale computational investigations of groundwater levels are proposed to accelerate science delivery through a workflow spanning database assembly, statistics, and information synthesis and packaging. A water-availability study of the Mississippi River alluvial plain, and particularly the Mississippi River Valley alluvial aquifer (MRVA), is...

Asquith, William H.; Seanor, Ronald C.; McGuire, Virginia L.; Kress, Wade

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Year Published: 2020

Space use and relative habitat selection for immature green turtles within a Caribbean marine protected area

Background A better understanding of sea turtle spatial ecology is critical for the continued conservation of imperiled sea turtles and their habitats. For resource managers to develop the most effective conservation strategies, it is especially important to examine how turtles use and select for habitats within their developmental foraging...

Griffin, Lucas P; Smith, Brian J.; Cherkiss, Michael; Crowder, Andrew; Pollock, Clayton G; Hillis-Starr, Zandy; Danylchuk, Andy J.; Hart, Kristen

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Year Published: 2020

Urban stream syndrome and contaminant uptake in salamanders of Central Texas

We studied the ecological health of springs experiencing varying levels of urban development to assess impacts to rare endemic salamanders (Eurycea spp.) of Central Texas. We evaluated measures of invertebrate species richness, water quality, and contaminant uptake by salamanders to determine how springs and their inhabitants were being...

Diaz, Peter H.; Orsak, Erik L.; Weckerly, Floyd W.; Montagne, Mike A.; Alvarez, David

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Year Published: 2020

Investigating the gene expression profiles of rehabilitated Florida manatees (Trichechus manatus latirostris) following red tide exposure

To investigate a Florida manatee (Trichechus manatus latirostris) mortality event following a red tide bloom in Southwest Florida, an RNA sequencing experiment was conducted. Gene expression changes in white blood cells were assessed in manatees rescued from a red tide affected area (n = 4) and a control group (n = 7) using RNA sequencing. The...

Lazensky, Rebecca; Hunter, Margaret; Amador, David M.; Al-Khedery, Basima; Yu, Fahong; Walsh, Cathy; Gitzendanner, Matthew A.; Tripp, Katie; Walsh, Mike; Denslow, Nancy D.

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Year Published: 2020

Mortality and cholinesterase inhibition in butterflies following aerial naled applications for mosquito control on the National Key Deer Refuge

Natural resource managers are concerned about the impacts of aerial ultra-low volume spray (ULV) of insecticides for mosquito control (i.e., mosquito adulticides) and seek science-driven management recommendations that reduce risk but allow vector control for nearby human populations. Managers at the National Key Deer Refuge (Florida Keys, FL) are...

Bargar, Timothy; Anderson, Chad; Sowers, Anthony

Filter Total Items: 220
video thumbnail: Effects of Sea-Level Rise on Coastal Wetlands in the Mississippi Delta
March 30, 2009

Effects of Sea-Level Rise on Coastal Wetlands in the Mississippi Delta

This video describes research being conducted by Dr. Karen McKee, USGS Research Ecologist, and her university partner, Dr. Julia Cherry. Their goal is to better understand the effects of sea-level rise and other global change factors on coastal wetlands in the Mississippi River Delta. This region contains over 40% of the U.S. wetlands in the lower 48 states These wetlands

video thumbnail: Simulated groundwater declines in Central Arkansas
January 6, 2009

Simulated groundwater declines in Central Arkansas

A groundwater-flow model of the Mississippi embayment was used to evaluate changes in water-level altitudes after the addition of wells that simulate potential future pumping from the Sparta aquifer in the Bayou Meto-Grand Prairie area of eastern Arkansas (shown within the black outline) for the 30-year period from 2007 through 2037. The animation portrays the time-lapse

video thumbnail: The Mississippi embayment — Where Does the Water Come From?
January 6, 2009

The Mississippi embayment — Where Does the Water Come From?

As the animation begins, the land surface of the Mississippi embayment fades away to reveal underground geologic formations (shown as shades of blue, brown, and gray surfaces). A slice deep into the earth cuts off the eastern half of the embayment so we can peer into the formations (aquifers) beneath the surface. The lower portion of different colored water wells (orange,

video thumbnail: The Mississippi embayment — a look underground
December 11, 2008

The Mississippi embayment — a look underground

Water, oil, and gas wells (shown as green lines) are drilled to hundreds or thousands of feet below land surface in an area known as the Mississippi embayment. Information gathered from these wells was used to create a 3D computer model of underground formations. Many of these formations (shown as shades of grey, blue, brown, or tan surfaces) consist of layers of sand and

Image: WRP Morehouse Parish, Louisiana
November 14, 2008

WRP Morehouse Parish, Louisiana

Wetlands Reserve Program site in Morehouse Parish, Louisiana.  Green tree frogs rest on a Wetlands Reserve Program easement boundary sign in Morehouse Parish, Louisiana.

Midwest farm landscape
September 19, 2008

Farm in Iowa with silos

This farm in Iowa sits amid a field of corn.  USGS researches the effects of agricultural use of fertilizers, pesticides, and other chemicals on surface-water and groundwater quality.

Farm in Iowa in morning mist
September 19, 2008

Farm in Iowa in morning mist amid cornfield

Iowa farm in a cornfield in the early morning mist.  USGS research investigates the effects of agricultural use of fertilizers, pesticides, and other chemicals in the quality of surface water and groundwater.

Flood of March 19, 2008, Buffalo River near St. Joe, Ark.
March 19, 2008

Flood of March 19, 2008 at Buffalo River, Ark.

B.K. Martin, hydrologic technician in the Little Rock office of the USGS Lower Mississippi-Gulf Water Science Center, measuring streamflow with an acoustic doppler current profiler during flood of March 19, 2008, at USGS streamflow-gaging station 07056000, Buffalo River near St. Joe, Arkansas. Photograph by W.E. Baldwin, USGS Lower Mississippi-Gulf Water Science Center.

...
USGS streamflow-gaging station 07056000, Buffalo River near St. Joe, Arkansas
March 19, 2008

Measuring streamflow with an acoustic doppler current profiler

B.K. Martin, hydrologic technician in the Little Rock office of the USGS Lower Mississippi-Gulf Water Science Center, measuring streamflow with an acoustic doppler current profiler during flood of March 19, 2008, at USGS streamflow-gaging station 07056000, Buffalo River near St. Joe, Arkansas. Photograph by W.E. Baldwin, USGS Lower Mississippi-Gulf Water Science Center.

Flood at White River at Calico Rock, Arkansas
March 19, 2008

White River at Calico Rock, Arkansas, during flood of March 19, 2008

White River at Calico Rock, Arkansas, during flood of March 19, 2008. Photograph by Daniel M. Wagner, U.S. Geological Survey.

Filter Total Items: 253
USGS
August 29, 2008

Real-time flooding and storm surge information is available as Tropical Storm Gustav approaches the Gulf Coast by visiting the interactive US Geological Survey (USGS) Water Hazards Map.

USGS
August 28, 2008

U.S. Geological Survey (USGS) scientists will be installing rapidly-deployable mobile gages and storm-surge sensors to prepare for Tropical Storm Gustav.

USGS
June 12, 2008

Today the U.S. Geological Survey is installing a temporary streamgage in downtown Cedar Rapids until the permanent streamgage can be restored. Transmission of the information from the streamgage was abruptly interrupted last night when power to the downtown Cedar Rapids area was cut off because of safety concerns due to the flooding and the backup system failed. 

USGS
May 1, 2008

The largest flood on the lower Mississippi River since 1973 was measured on April 22 in Vicksburg, Mississippi by the U.S. Geological Survey (USGS), in cooperation with the U.S. Army Corps of Engineers.

USGS
April 21, 2008

Partners in the Sparta Aquifer Recovery Initiative in southern Arkansas and northern Louisiana were recognized with the Department of the Interior's Cooperative Conservation Award today.

USGS
January 29, 2008

Nine states in the Mississippi River Basin contribute the majority of nutrients to the Northern Gulf of Mexico, threatening the economic and ecological health of one of the nation's largest and most productive fisheries.

USGS
January 24, 2008

The overabundance of nutrients in the Gulf has resulted in a zone of low dissolved oxygen, or hypoxia, which can cause stress and death in bottom-dwelling organisms, threatening the economic and ecological health of the one of the nation's most productive fisheries.

USGS
June 25, 2007

Watch history in action as U.S. Geological Survey (USGS) scientists share the secrets of sampling for metals in water with the Indian Tribes from Oklahoma, New Mexico, Louisiana, Texas, and Arkansas U.S. Environmental Protection Agency (USEPA), Region VI.

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.