Unified Interior Regions

Region 4: Mississippi Basin

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Filter Total Items: 238
Date published: March 15, 2018
Status: Active

Webinar: Projecting Climate Change Impacts on Wetland-Dependent Birds in the Prairie Pothole Region

View this webinar to learn how scientists are projecting the impacts of climate change on birds in the Prairie Pothole Region.

Date published: February 27, 2018
Status: Active

Paleoceanographic Proxy Calibration

A sediment trap time series in the northern Gulf of Mexico is used to better assess the control of environmental variables (e.g., temperature and salinity) on the flux of both microfossils and molecular fossils to the sediments. The information gained from sediment trap studies is used to develop better proxy-based estimates of past oceanographic conditions from analyses of microfossils and ...

Date published: February 22, 2018
Status: Active

Climate and Environmental Change in the Gulf of Mexico and Caribbean

This project documents paleoceanographic, climatic, and environmental changes in the Gulf of Mexico and adjacent land areas over the last 10,000 years. The paleoenvironmental data is used to determine rates of change in the past, and to better understand both the natural and anthropogenic factors that contribute to climate variability on inter-annual to millennial timescales.

Date published: February 8, 2018
Status: Active

Louisiana Barrier Island Habitat Mapping and Change Assessment

Barrier islands provide numerous invaluable ecosystem goods and services including storm protection and erosion control for the mainland, habitat for fish and wildlife, salinity regulation in estuaries, carbon sequestration in marshes, recreation, and tourism. These islands are dynamic environments due to their position at the land-sea interface. Storms, wave energy, tides, currents, and...

Date published: January 23, 2018
Status: Active

Scenario-Based Assessments for Coastal Change Hazard Forecasts

A decade of USGS research on storm-driven coastal change hazards has provided the data and modeling capabilities needed to identify areas of our coastline that are likely to experience extreme and potentially hazardous erosion during an extreme storm.

Contacts: Kara Doran
Date published: January 18, 2018
Status: Active

National Assessment of Storm-Induced Coastal Change Hazards

This project focuses on understanding the magnitude and variability of extreme storm impacts on sandy beaches. The overall objective is to improve real-time and scenario-based predictions of coastal change to support management of coastal infrastructure, resources, and safety. 

Contacts: Kara Doran
Date published: January 18, 2018
Status: Active

National Assessment of Coastal Vulnerability to Sea Level Rise

The original national coastal vulnerability index (CVI) assessment was motivated by expected accelerated sea-level rise (SLR) and the uncertainty in the response of the coastline to SLR. This research was conducted between 1999 and 2001, and is currently being updated using new data sources and methodology. This original study was part of the ...

Date published: January 18, 2018
Status: Active

Long-Term Coastal Change

Goals of this task include developing and improving coastal-change assessments and supporting long-term planning and decision making to ensure sustainable coastal economies, infrastructure, and ecosystems.

Date published: January 12, 2018
Status: Active

Barrier Island Comprehensive Monitoring

Historical and newly acquired data were used to assess and monitor changes in the aerial and subaqueous extent of islands, habitat types, sediment properties, environmental processes, and vegetation composition. Research is part of the Geologic and Morphologic Evolution of Coastal Margins...

Date published: January 10, 2018
Status: Active

Integrating Mapping and Modeling to Support the Restoration of Bird Nesting Habitat at Breton Island National Wildlife Refuge

In response to storms, reduced sediment supply, and sea-level rise, Breton Island is rapidly deteriorating, impacting the available nesting habitat of endangered seabirds. This study provides critical information regarding the physical environment of the island system. Research is part of the ...

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Year Published: 2020

A tropical cyclone-induced ecological regime shift: Mangrove forest conversion to mudflat in Everglades National Park (Florida, USA)

The ecological effects of tropical cyclones on mangrove forests are diverse and highly location- and cyclone-dependent. Ecological resistance, resilience, and enhancement are terms that describe most mangrove forest responses to tropical cyclones. However, in the most extreme cases, tropical cyclones can trigger abrupt and irreversible ecological...

Osland, Michael; Feher, Laura; Anderson, Gordon; Vervaeke, William; Krauss, Ken; Whelan, Kevin R.T.; Balentine, Karen S.; Tiling-Range, G.; Smith, Thomas J.; Cahoon, Donald

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Year Published: 2020

Developmental ecomorphology of the epibranchial organ of the silver carp, Hypophthalmichthys molitrix

Silver carp regularly consume and digest particles of food as small as 5 μm. This ability drives their efficient consumption of phytoplankton and because they feed low on the food chain they have an important place in aquaculture worldwide. In North America, where they are considered invasive, silver carp deplete food resources for native species...

Cohen, Karly E.; George, Amy E.; Chapman, Duane C.; Chick, John H.; Hernandez, L. Patricia

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Year Published: 2020

Estimating the effect of winter cover crops on nitrogen leaching using cost-share enrollment data, satellite remote sensing, and Soil and Water Assessment Tool (SWAT) modeling

This study employed a novel combination of data (winter cover crop cost-share enrollment records, satellite remote sensing of wintertime vegetation, and results of Soil and Water Assessment Tool (SWAT) water quality simulations) to estimate the environmental performance of winter cover crops (WCC) at the watershed scale, from 2008 through 2017,...

Hively, W. Dean; Lee, Sangchul; Sadeghi, Ali M.; McCarty, Gregory W.; Lamb, Brian T.; Soroka, Alexander M.; Keppler, Jason; Yeo, In-Young; Moglen, Glenn E.

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Year Published: 2020

Joint seasonality in geographic and ecological spaces, illustrated with a partially migratory bird

As most species live in seasonal environments, considering varying conditions is essential to understand species dynamics in both geographic and ecological spaces. Both resident and migratory species need to contend with seasonality and balance settling in favorable areas with tracking favorable environmental conditions during the year. We present...

Basille, Mathieu; Watling, James I.; Romanach, Stephanie; Borkhataria, Rena R.

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Year Published: 2020

Louisiana Barrier Island Comprehensive Monitoring Program: Mapping habitats in beach, dune, and intertidal environments along the Louisiana Gulf of Mexico shoreline, 2008 and 2015–16

Barrier islands, headlands, and coastal shorelines provide numerous valuable ecosystem goods and services, including storm protection and erosion control for the mainland, habitat for fish and wildlife, salinity regulation in estuaries, carbon sequestration in marshes, and areas for recreation and tourism. These coastal features are dynamic...

Enwright, Nicholas M.; SooHoo, William M.; Dugas, Jason L.; Conzelmann, Craig P.; Laurenzano, Claudia; Lee, Darin M.; Mouton, Kelly; Stelly, Spencer J.
Enwright, N.M., SooHoo, W.M., Dugas, J.L., Conzelmann, C.P., Laurenzano, C., Lee, D.M., Mouton, K., and Stelly, S.J., 2020, Louisiana Barrier Island Comprehensive Monitoring Program—Mapping habitats in beach, dune, and intertidal environments along the Louisiana Gulf of Mexico shoreline, 2008 and 2015–16: U.S. Geological Survey Open-File Report 2020–1030, 57 p., https://doi.org/10.3133/ofr20201030.

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Year Published: 2020

Evaluating the potential role of bioactive chemicals on the distribution of invasive Asian carp upstream and downstream from river mile 278 in the Illinois waterway

Two non-native carp species have invaded the Illinois Waterway and are a threat to Great Lakes ecosystems. Poor water quality in the upper Illinois Waterway, may be a factor contributing to the stalling of the carp population front near river mile 278. In 2015, the U.S. Geological Survey collected 4 sets of water samples from two sites upstream...

Battaglin, William A.; Duncker, James J.; Terrio, Paul J.; Bradley, Paul; Barber, Larry; DeCicco, Laura A.

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Year Published: 2020

A multi-model approach toward understanding iron fouling at rock-fill drainage sites along roadways in New Hampshire, USA

Factors affecting iron fouling in wet areas adjacent to roadways were investigated by collecting field rock cut and aqueous physicochemical data; developing exploratory predictive models; and developing geochemical models. Basic data included the identification of iron fouling from aerial imagery and field visits at 374 New Hampshire rock cut...

Lombard, Melissa; Lombard, Pamela J.; Brown, Craig J.; Degnan, James

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Year Published: 2020

Food web controls on mercury fluxes and fate in the Colorado River, Grand Canyon

Mercury (Hg) biomagnification in aquatic food webs is a global concern; yet, the ways species traits and interactions mediate these fluxes remain poorly understood. Few pathways dominated Hg flux in the Colorado River despite large spatial differences in food web complexity, and fluxes were mediated by one functional trait, predation resistance....

Walters, David; Cross, Wyatt F.; Kennedy, Theodore; Baxter, Colden V.; Hall, R. O.; Rosi, Emma J.

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Year Published: 2020

Fluoride occurrence in United States groundwater

Data from 38,105 wells were used to characterize fluoride (F) occurrence in untreated United States (U.S.) groundwater. For domestic wells (n = 11,032), water from which is generally not purposely fluoridated or monitored for quality, 10.9% of the samples have F concentrations >0.7 mg/L (U.S. Public Health Service recommended optimal F...

McMahon, Peter B.; Brown, Craig J.; Johnson, Tyler D.; Belitz, Kenneth; Lindsey, Bruce D.

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Year Published: 2020

Species richness responses to water withdrawal scenarios and minimum flow levels: Evaluating presumptive standards in the Tennessee and Cumberland River basins

Water resource managers are challenged to balance growing water demand with protecting aquatic ecosystems and biodiversity. Management decisions can benefit from improved understanding of water withdrawal impacts on hydrologic regimes and ecological assemblages. This study used Ecological Limit Functions for fish groups within the Tennessee and...

Driver, Lucas; Cartwright, Jennifer M.; Knight, Rodney; Wolfe, William J.

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Year Published: 2020

Factors affecting sampling strategies for design of an effects‐directed analysis for endocrine‐active chemicals

Effects‐directed analysis (EDA) is an important tool for identifying unknown bioactive components in a complex mixture. Such an analysis of endocrine‐active chemicals (EACs) from water sources has promising regulatory implications but also unique logistical challenges. We propose a conceptual EDA (framework) based on a critical review of EDA...

Brennan, Jennifer; Gale, Robert W.; Alvarez, David; Berninger, Jason P.; Leet, Jessica Kristin; Li, Yan; Wagner, Tyler; Tillitt, Donald E.

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Year Published: 2020

Green turtle mitochondrial microsatellites indicate finer-scale natal homing to isolated islands than to continental nesting sites

 In highly mobile philopatric species, defining the scale of natal homing is fundamental to characterizing population dynamics and effectively managing distinct populations. Genetic tools have provided evidence of regional natal philopatry in marine turtles, but extensive sharing of maternally inherited mitochondrial control region (CR)...

Shamblin, Brian M.; Hart, Kristen; Martin, Kelly J.; Ceriani, Simona A.; Bagley, Dean A.; Mansfield, Katherine L.; Ehrhart, Llewellyn M.; Nairn, Campbell J.

Filter Total Items: 216
Two men mark a high-water mark on a structure
August 26, 2016

USGS Scientists Mark a High-Water Mark in Louisiana

Daniel McCay and Chris Henry, USGS hydrologic technicians, use a level to draw a line on a high-water mark August 26. In most circumstances, when a high-water mark is flagged it would then be surveyed with GPS equipment to obtain its exact coordinates and elevation. However, because of the possibility of more storms hitting Louisiana the teams were initially only

...
Two men walk by debris along the side of the road
August 26, 2016

Looking for High-Water Marks

Daniel McCay and Chris Henry, U.S. Geological Survey hydrologic technicians, search a neighborhood south of Denham Springs, Louisiana, for high-water marks August 26. The term high-water mark refers to the debris flood waters will leave on walls, buildings and trees. This thin line of residue is an indicator of how high the waters reached, yet the fragile nature of

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A man in an orange shirt writes on a pad of paper
August 26, 2016

Recording a High-Water Mark

Jonathan Gillip, USGS hydrologist, documents a high-water mark he flagged near a damage retirement community in Denham Springs, Louisiana, August 26. So far, USGS teams have flagged and surveyed more than 400 high-watermarks across southern Louisiana.

August 15, 2016

Flooding near Louisiana Water Science Center

The view on South Sherwood Forest Blvd near the USGS Louisiana Water Science Center office on August 15, 2016.

Image shows a flooded street with green median
August 13, 2016

Flooded Street in Denham Springs

Backwater flooding across Florida Blvd near the Amite River Bridge in Denham Springs, LA.

Image shows a flooded house with trees in the background
August 13, 2016

Flooded House in Denham Springs

A flooded house near the confluence of the Comite and Amite Rivers near Denham Springs, LA.

Image shows flooded houses and vehicles
August 13, 2016

Flooded Neighborhood in Denham Springs

A flooded neighborhood near the confluence of the Comite and Amite Rivers near Denham Springs, LA. 

Photo of USGS Biologist preparing to artificially spawn a female lake sturgeon.
August 5, 2016

Lake sturgeon at the USGS Columbia Environmental Research Center

USGS Biologist prepares to artificially spawn a female lake sturgeon in the laboratory at the Columbia Environmental Research Center.

Photo of USGS biologist preparing to release a reproductive female pallid sturgeon.
August 5, 2016

USGS Biologist prepares to release a reproductive female sturgeon.

USGS Biologist Sabrina Davenport prepares to release a reproductive female pallid sturgeon.

Pallid sturgeon free embryo at approximately 5 days post-hatch
July 14, 2016

Pallid sturgeon free embryo at approximately 5 days post-hatch

Figure 3. Pallid sturgeon free embryo at approximately 5 days post-hatch, approximately 14-15 mm (about 0.57 of an inch) in length.

Pallid sturgeon free embryo at approximately 10 days post-hatch
July 14, 2016

Pallid sturgeon free embryo at approximately 10 days post-hatch

Pallid sturgeon free embryo at approximately 10 days post-hatch, approximately 19-20 mm (about 0.77 of an inch) in length.

Filter Total Items: 248
USGS science for a changing world logo
August 27, 2015

Coastal managers and planners now have access to a new U.S. Geological Survey handbook that, for the first time, comprehensively describes the various models used to study and predict sea-level rise and its potential impacts on coasts.

USGS
August 17, 2015

The City of West Branch, Iowa, and the U.S. Geological Survey recently partnered to provide real-time streamflow and flood warning information on the west branch of flood-prone Wapsinonoc Creek.

Graph: Peak ground-motion variability for a magnitude 7.7 earthquake
July 30, 2015

Computer simulations of earthquake shaking, replicating the quakes that occurred in 1811-1812 in the New Madrid seismic zone (NMSZ), indicate that future large earthquakes there would produce major, prolonged ground shaking.

Image: Pallid Sturgeon
July 30, 2015

Three tiny fish larvae that were captured by U.S. Geological Survey scientists in May 2014 have just been confirmed to be pallid sturgeon. These new genetic identifications add to mounting evidence that critically endangered pallid sturgeon spawned successfully in the Lower Missouri River downstream of Gavins Point Dam, South Dakota.

2015 version of Tupelo, Mississippi US Topo quadrangle with orthoimage turned off.
July 28, 2015

Several of the 772 new US Topo quadrangles for Mississippi now display parts of the Natchez Trace National Scenic Trail and other selected public trails. Further significant additions to the new quadrangles include map symbol redesign, enhanced railroad information and new road source data.

USGS
July 15, 2015

The drainage of small wetlands can decrease wildlife habitat and may contribute to flooding in the Prairie Pothole Region (PPR), according to a recent U.S. Geological Survey study.

USGS
June 29, 2015

Interior Department’s Northeast Climate Science Center has released a report today synthesizing the latest information on the vulnerability of species and ecosystems to climate change in a 22-state region in the Northeast and Midwest U.S.

Updated 2015 version of Saint Landry quadrangle with orthoimage turned on
May 20, 2015

Several of the 812 new US Topo quadrangles for Louisiana now display public trails along with improved data layers. Other significant additions include public land survey system information (PLSS), redesign of map symbols, enhanced railroad information and new road source data.

USGS science for a changing world logo
May 18, 2015

Water contamination by hormone-disrupting pollutants is a concern for water quality around the world. Existing research has determined that elevated concentrations of Bisphenol-A (BPA), a chemical used in consumer products such as plastic food storage and beverage containers, have been deposited directly into rivers and streams by municipal or industrial wastewater.

USGS
March 25, 2015

The U.S. Geological Survey’s National Wetlands Research Center in Lafayette and the Southeast Ecological Science Center in Gainesville, Florida will merge under the same leadership effective October 1, 2015.