Unified Interior Regions

Region 4: Mississippi Basin

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Filter Total Items: 239
Date published: April 25, 2016
Status: Active

Investigation of Causal Mechanisms of Coastal Wetland Change in Coastal Louisiana

This task will involve the compilation of all data sources and expert knowledge of causal mechanisms of specific areas of wetland loss throughout the coastal zone of Louisiana.

Date published: April 25, 2016
Status: Active

Spatial Analysis of Coastal Wetlands Planning, Protection and Restoration Act Projects

As the first federally mandated restoration program, Louisiana enacted the Coastal Wetlands Planning, Protection and Restoration Act (CWPPRA) to address Louisiana’s land loss crisis.

Contacts: Holly J Beck
Date published: April 25, 2016
Status: Active

Gulf of Mexico Land Loss Change Assessment: A Cooperative Study with the Bureau of Ocean and Energy Management

Eighty-five percent of the coastal wetland loss in the contiguous United States occurs in the Gulf of Mexico. Documenting and understanding the occurrence of this wetland loss will provide for effective planning, mitigation, and restoration activities.

Date published: April 25, 2016
Status: Active

Hyper-Temporal Land Area Change Rates in Coastal Louisiana from 1973 to 2015

This study analyzes changes in the extent of land in coastal Louisiana by using an average of 81 datasets (multiple dates of satellite data from 1973 to 2014) for summarizing land and water areas.

Date published: April 25, 2016
Status: Active

Supporting Large-scale Biological Monitoring and Modeling through Data Management and Visualization: Coastal Information Management System (CIMS)

The Coastal Protection and Restoration Authority (CPRA) and USGS have partnered to utilize the data management and visualization capacities of the Wetland and Aquatic Research Center’s Advanced Application Team to manage, deliver, and visualize the largest biological dataset maintained in coastal Louisiana.

Date published: April 18, 2016
Status: Active

Long-term Trends in Swamp Tree Growth across Drought and Salinity Gradients along the Northern Gulf Coast

This study will examine the potential effects of climate-change-induced sea level rise, drought and water extraction by examining tree growth patterns across the Gulf Coast, specifically targeting long-term research plots available in the North American Baldcypress Swamp Network (NABCSN) and the Suwannee River.

Date published: April 17, 2016
Status: Active

Mangrove Migration Network

At the poleward marsh-mangrove ecotone, mangrove abundance and coverage is winter temperature-sensitive in that it oscillates in response to the frequency, duration, and/or intensity of extreme winter temperatures. Future winter climate change is expected to facilitate poleward mangrove range expansion at the expense of salt marshes in Texas, Louisiana, and parts of Florida. 

Date published: April 17, 2016
Status: Active

Incorporating Future Change into Current Conservation Planning: Evaluating Wetland Migration along the Gulf of Mexico under Alternative Sea-Level Rise and Urbanization Scenarios

More than half of contiguous U.S. coastal wetlands are located along the Gulf of Mexico coast. These highly-productive wetlands support many ecosystem goods and services and fish and wildlife habitat. Historically, coastal wetlands have adapted to sea-level changes via lateral and vertical movement on the landscape. As sea levels rise in the future, coastal wetlands will adapt and migrate...

Date published: April 17, 2016
Status: Active

Macroclimatic Controls of Coastal Wetland Ecosystem Structure and Function

At the global-scale, macroclimatic drivers govern ecosystem structure and function in tidal saline wetlands (e.g., salt marshes, mangrove forests, salt flats). However, global reviews and models for these ecosystems typically do not directly include climatic drivers. The objective of this research is to examine and forecast the effects of macroclimatic drivers on wetland ecosystem structure...

Date published: April 17, 2016
Status: Active

Mississippi Coastal Improvements Program (MsCIP) - Adaptive Management and Monitoring Planning and Implementation

 The Mississippi barrier islands are dynamic coastal landforms that are the first line of defense between the Gulf of Mexico and the Mississippi mainland coast. These islands are experiencing changes in structure (land area and habitat) and geomorphic processes (erosion and accretion) due to frequent intense storms, relative rise in sea level, and changes in sediment supply. A long-term...

Contacts: Brett A. Patton
Date published: April 17, 2016
Status: Active

Geographical Trends in Ecosystem Function and Biodiversity of Wetlands as a Surrogate for Climate Change

Extreme drought and temperature in the southeastern United States may become more frequent in the future, and any  extreme shifts in climate condition are likely to have effects on wetland ecosystem function. USGS research predicts the effects of climate change by shifts in function and biodiversity across existing  climate gradients in baldcypress swamps. 

Filter Total Items: 4,622
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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.; Benson, Amy J.; 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

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Year Published: 2021

Identifying sources and year classes contributing to invasive grass carp in the Laurentian Great Lakes

Relative contributions of aquaculture-origin and naturally-reproduced grass carp (Ctenopharyngodon idella) in the Laurentian Great Lakes have been unknown. We assessed occurrence and distribution of aquaculture-origin and wild grass carp in the Great Lakes using ploidy and otolith stable oxygen isotope (δ18O) data. We inferred natal river and...

Whitledge, Gregory W.; Chapman, Duane C.; Farver, John; Herbst, Seth; Mandrak, Nicholas E.; Miner, Jeffrey G.; Pangle, Kevin L.; Kocovsky, Patrick

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Year Published: 2021

Source switching maintains dissolved organic matter chemostasis across discharge levels in a large temperate river network

Dissolved organic matter (DOM) helps regulate aquatic ecosystem structure and function. In small streams, DOM concentrations are controlled by transport of terrestrial materials to waterways, and are thus highly variable. As rivers become larger, the River Continuum Concept hypothesizes that internal primary production is an increasingly important...

Hosen, J.D.; Aho, K.S.; Fair, Jennifer Burlingame Hoyle; Kyzivat, E.D.; Matt, S.; Morrison, Jonathan; Stubbins, A.; Weber, L.C.; Yoon, B.; Raymond, P.A.

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Year Published: 2021

Using decision analysis to collaboratively respond to invasive species threats: A case study of Lake Erie grass carp (Ctenopharyngodon idella)

Decisions about invasive species control and eradication can be difficult because of uncertainty in population demographics, movement ecology, and effectiveness of potential response actions. These decisions often include multiple stakeholders and management entities with potentially different objectives, management priorities, and jurisdictional...

Robinson, Kelly F.; DuFour, Mark R.; Jones, Michael; Herbst, Seth; Newcomb, Tammy; Boase, James C.; Brenden, Travis O.; Chapman, Duane C.; Dettmers, John M.; Francis, James; Hartman, Travis; Kocovsky, Patrick; Locke, Brian; Mayer, Christine; Tyson, Jeff

Filter Total Items: 216
07048490, Town Branch tributary at Highway 16 at Fayetteville, Arkansas
April 25, 2011

Flood at 07048490, Town Branch trib. at Highway 16 Fayetteville, Ark.

Flood of April 25, 2011, at U.S. Geological Survey (USGS) streamflow-gaging station 07048490, Town Branch tributary at Highway 16 at Fayetteville, Arkansas. Photograph by D.M. Wagner, Lower Mississippi-Gulf Water Science Center.

Flood at station 07048600, White River near Fayetteville, Arkansas
April 25, 2011

Flood at USGS station 07048600, White River nr. Fayetteville, Arkansas

Flood of April 25, 2011, at USGS streamflow-gaging station 07048600, White River near Fayetteville, Arkansas. Photograph by K.M. Hubbs, Lower Mississippi-Gulf Water Science Center.

Flood of April 25, 2011, at U.S. Geological Survey (USGS) streamflow-gaging station 07048490, Town Branch tributary at Highway 1
April 4, 2011

Flood of April 25, 2011, Town Branch trib., Hwy 16

Flood of April 25, 2011, at U.S. Geological Survey (USGS) streamflow-gaging station 07048490, Town Branch tributary at Highway 16 at Fayetteville, Arkansas. Photograph by D.M. Wagner, Lower Mississippi-Gulf Water Science Center.

SIR 2016–5081

Flood of April 25, 2011, Highway 16 at Fayetteville, Arkansas
April 4, 2011

Flood of April 25, 2011, White River, Ark.

Flood of April 25, 2011, at USGS streamflow-gaging station 07048600, White River near Fayetteville, Arkansas. Photograph by K.M. Hubbs, Lower Mississippi-Gulf Water Science Center.

SIR 2016–5081

video thumbnail: The Mississippi Embayment - Declining Water Levels in a Shallow Aquifer
December 2, 2010

The Mississippi Embayment - Declining Water Levels in a Shallow Aquifer

The USGS recently constructed a computer model of groundwater in the Mississippi embayment. This model was used to simulate the rise or decline of water level in a shallow aquifer. Water from this shallow aquifer is utilized by the agricultural based economy in the area. In the animation, groundwater levels decline more than 100 feet from 1870 to 2007 in some areas of the

video thumbnail: The Mississippi Embayment - Declining Water Levels in a Deep Aquifer
December 2, 2010

The Mississippi Embayment - Declining Water Levels in a Deep Aquifer

The USGS recently constructed a computer model of groundwater in the Mississippi embayment. This model was used to simulate the rise or decline of water level in a deep aquifer. Water from this deep aquifer is utilized to meet the industrial and public supply needs in the area. In the animation, groundwater levels decline more than 400 feet from 1870 to 2007 in some areas

Little Missouri River near Camp Area C at Albert Pike Recreation Area, Arkansas
September 15, 2010

Little Missouri River near Camp Area C at Albert Pike Recreation Area

Little Missouri River near Camp Area C at Albert Pike Recreation Area, Arkansas (photograph by Daniel M. Wagner, U.S. Geological Survey).

Image: WRP St. Landry Parish, Louisiana
July 12, 2010

WRP St. Landry Parish, Louisiana

Wetlands Reserve Program site in St. Landry Parish, Louisiana.  Changes in a local river resulted in the landowner’s fields flooding on a regular basis. The landowner worked through the USDA Natural Resources Conservation Service to restore his fields to their natural wetland state.

Image: Oil Spill Samples Arrive from Louisiana
May 14, 2010

Oil Spill Samples Arrive from Louisiana

On April 20, 2010, the Deepwater Horizon Drilling Platform exploded and sank, causing the largest oil spill yet recorded. Samples from the oil spill were collected by Louisiana USGS scientists Greg Swayze and Charlie Demas and sent for analysis in Menlo Park, CA. The Louisiana samples were discovered on several of Louisiana's barrier islands, including Grand Isle, a large

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Filter Total Items: 255
USGS science for a changing world logo
May 6, 2011

The U.S. Geological Survey is monitoring extremely high floodwaters that caused the Arkansas State Highway and Transportation Department to close a stretch of Interstate 40 near Des Arc, Ark.

Interstate 40 is the primary route between Little Rock and Memphis and is one of the busiest truck routes in the nation.

USGS science for a changing world logo
May 2, 2011

U.S. Geological Survey field crews continue to measure historic flooding across most of Arkansas. 

River levels are still rising in parts of the state; many have increased by as much as 15 to 30 feet since heavy rainfall began on April 22. Near real-time river level and streamflow information from 149 USGS Arkansas streamgage locations is available online. 

USGS science for a changing world logo
April 26, 2011

The National Earthquake Prediction Evaluation Council has issued a new report in which independent experts conclude that current USGS estimates for significant earthquake hazards in the New Madrid Seismic Zone—affecting eight central and eastern U.S states—are based on sound science.

USGS science for a changing world logo
April 26, 2011

U.S. Geological Survey field crews are measuring all-time record flooding on the Illinois River in Northwestern Arkansas. 

Twelve USGS streamgages in northern Arkansas have measured the highest flood levels ever recorded. Two out of the 12 sites have long-term streamflow records since 1979.

USGS science for a changing world logo
April 26, 2011

Heavy rainfall of more than 10 inches during the last 24 hours has caused substantial flooding in parts of Southern Missouri. 

Today, there are 19 U.S. Geological Survey scientists out in the field collecting critical streamflow data, which are vital for protection of life, property and the environment. 

USGS science for a changing world logo
April 25, 2011

Heavy rainfall of more than 8 inches in northwestern Arkansas has caused substantial flooding in parts of the White River and Arkansas River Basins.

USGS science for a changing world logo
February 18, 2011

Nearly 60 small and moderate earthquakes struck Arkansas since Feb. 15, 2011, the most recent a magnitude 4.3 earthquake this morning 37 miles away from Little Rock. Many of the earthquakes are large enough to be felt.

USGS science for a changing world logo
February 9, 2011

Earthquakes pose an ongoing hazard to people, buildings, and infrastructure in St. Louis and surrounding areas.

One of the known sources of large earthquakes in the past is the New Madrid seismic zone.

USGS science for a changing world logo
January 14, 2011

Matthew Andersen has been selected as the Deputy Center Director of the U. S. Geological Survey National Wetlands Research Center in Lafayette, La.

The NWRC develops and disseminates scientific information needed for understanding the ecology and value of the Nation's wetlands and for managing and restoring wetland habitats and associated plant and animal communities. 

USGS science for a changing world logo
January 10, 2011

Large wildlife die-off events are fairly common, though they should never be ignored, according to the U.S. Geological Survey scientists whose preliminary tests showed that the bird deaths in Arkansas on New Year’s Eve and those in Louisiana were caused by impact trauma.

USGS
November 30, 2010

Growing corn for biofuels production is having unintended effects on water quality and quantity in northwestern Mississippi.

USGS
November 23, 2010

Phil Turnipseed has been selected as the Director of the U. S. Geological Survey National Wetlands Research Center in Lafayette, La.