Unified Interior Regions

Region 4: Mississippi Basin

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Year Published: 2019

Monitoring plans for Louisiana’s system-wide assessment and monitoring program (SWAMP). Version IV

The System-Wide Assessment and Monitoring Program (SWAMP) has been envisioned as a long-term monitoring program to ensure a comprehensive network of coastal data collection activities is in place to support the development, implementation, and adaptive management of the coastal protection and restoration program within coastal Louisiana. The...

Hemmerling, Scott; Baustian, Melissa M.; Bienn, Harris; Dausman, Alyssa; Grace, Alaina; Grimley, Lauren; McInnis, Adrian; Vingiello, Michael; Vu, Huy; Sable, Shaye; Gentile, Britt; Lafargue, Phillip; Hijuelos, Ann; Piazza, Sarai; Stagg, Camille; Raynie, Richard C; Haywood, Edward; Khalid, Syed

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Year Published: 2019

Relations of dissolved-oxygen variability, selected field constituents, and metabolism estimates to land use and nutrients in high-gradient Boston Mountain streams, Arkansas

Continuous monitoring data can be extremely useful for assessing water quality conditions particularly for variables that exhibit dynamic diel swings such as dissolved oxygen. As a means of evaluating dissolved oxygen criteria used by the Arkansas Department of Environmental Quality (ADEQ) for assessing this stream class, we compared continuous...

Justus, Billy; Driver, Lucas; Green, J.J.; Wentz, Nathan

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Year Published: 2019

A multi-indicator spatial similarity approach for evaluating ecological restoration scenarios

ContextThe greater Everglades region in Florida (USA) is an area of wetlands that has been altered and reduced to 50% of its original area and faces multiple threats. Spatial landscape analysis can help guide a large and complex ecosystem restoration process, involving billions of dollars and multiple groups of stakeholders.ObjectivesTo guide...

Wiederholt, Ruscena; Paudel, Rajendara; Khare, Yogesh; Davis, Stephen E.; Naja, G.M.; Romanach, Stephanie; Pearlstine, L.; Van Lent, Thomas

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Year Published: 2019

Putative mitochondrial sex determination in the Bivalvia: Insights from a hybrid transcriptome assembly in freshwater mussels

Bivalves exhibit an astonishing diversity of sexual systems, with genetic and environmental determinants of sex, and possibly the only example of mitochondrial genes influencing sex determination pathways in animals. In contrast to all other animal species in which strict maternal inheritance (SMI) of mitochondria is the rule, bivalves possess a...

Capt, Charlotte; Renaut, Sebastien; Stewart, Donald; Johnson, Nathan; Breton, Sophie

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Year Published: 2019

Temperature thresholds for black mangrove (Avicennia germinans) freeze damage, mortality, and recovery in North America: Refining tipping points for range expansion in a warming climate

Near the tropical‐temperate transition zone, warming winter temperatures are expected to facilitate the poleward range expansion of freeze‐sensitive tropical organisms. In coastal wetlands of eastern and central North America, freeze‐sensitive woody plants (mangroves) are expected to expand northward into regions currently dominated by freeze‐...

Osland, Michael; Day, Richard; Hall, Courtney T.; Feher, Laura; Armitage, Anna R.; Cebrian, Just; Dunton, Kenneth H.; Hughes, Randall; Kaplan, David; Langston, Amy K.; Macy, Aaron; Weaver, Carolyn A.; Anderson, Gordon H.; Cummins, Karen; Feller, Ilka C.; Snyder, Caitlin M.

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Year Published: 2019

Informing sea turtle outreach efforts to maximize effectiveness

Most sea turtle (Cheloniidae) species worldwide are endangered or threatened, with threats causing harm to sea turtles predominantly human‐induced. Thus, prevention of further declines to these imperiled species will require alteration of human behaviors. Regulations, incentives, and environmental education are 3 strategies that could be used to...

Swindall, Jessica E.; Ober, Holly K.; Lamont, Margaret; Carthy, Raymond

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Year Published: 2019

Potentiometric surface of the Mississippi River Valley alluvial aquifer, spring 2016

A potentiometric surface map for spring 2016 was created for the Mississippi River Valley alluvial (MRVA) aquifer using selected available groundwater-altitude data from wells and surface-water-altitude data from streamgages. Most of the wells were measured annually or one time after installation, but some wells were measured more than one time or...

McGuire, Virginia L.; Seanor, Ronald C.; Asquith, William H.; Kress, Wade; Strauch, Kellan R.
McGuire, V.L., Seanor, R.C., Asquith, W.H., Kress, W.H., and Strauch, K.R., 2019, Potentiometric surface of the Mississippi River Valley alluvial aquifer, spring 2016: U.S. Geological Survey Scientific Investigations Map 3439, 14 p., 5 sheets, https://doi.org/10.3133/sim3439.

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Year Published: 2019

Photosynthetic and respiratory responses of two bog shrub species to whole ecosystem warming and elevated CO2 at the boreal-temperate ecotone

Peatlands within the boreal-temperate ecotone contain the majority of terrestrial carbon in this region, and there is concern over the fate of such carbon stores in the face of global environmental changes. The Spruce and Peatland Response Under Changing Environments (SPRUCE) facility aims to advance the understanding of how such peatlands may...

Ward, Eric; Warren, Jeffrey M .; McLennan, David A; Dusenge, Mirindi E; Way, Danielle A.; Wullschleger, Stan D.; Hanson, Paul J

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Year Published: 2019

Influence of dissolved organic carbon on the acute toxicity of copper and zinc to White Sturgeon (Acipenser transmontanus) and a Cladoceran (Ceriodaphnia dubia)

We conducted acute lethality tests with white sturgeon (Acipenser transmontanus) and Ceriodaphnia dubia exposed to copper and zinc at dissolved organic carbon concentrations ranging from 0.5 to 5.5 mg/L. Dissolved organic carbon had minimal effects on zinc toxicity but did have a protective effect on acute copper toxicity, which was equal to that...

Ivey, Chris D.; Besser, John M.; Steevens, Jeffery; Walther, Michael; Melton, Vanessa

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Year Published: 2019

Effects of the neonicotinoid insecticide clothianidin on southern leopard frog (Rana sphenocephala) tadpole behavior

Neonicotinoid insecticides are highly water soluble with relatively long half-lives, which allows them to move into and persist in aquatic ecosystems. However, little is known of the impacts of neonicotinoids on non-target vertebrates, especially at sublethal concentrations. We evaluated the effects of the neonicotinoid clothianidin on the...

Holtswarth, J. N.; Rowland, F. E.; Puglis, Holly J.; Hladik, Michelle; Webb, Elisabeth B.

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Year Published: 2019

Arsenic variability and groundwater age in three water supply wells in southeast New Hampshire

Three wells in New Hampshire were sampled bimonthly over three years to evaluate the temporal variability of arsenic concentrations and groundwater age. All samples had measurable concentrations of arsenic throughout the entire sampling period and concentrations in individual wells varied, on average, by more than 7 µg/L. High arsenic...

Levitt, Joseph; Degnan, James; Flanagan, Sarah; Jurgens, Bryant

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Year Published: 2019

Tritium as an indicator of modern, mixed, and premodern groundwater age

Categorical classification of groundwater age is often used for the assessment and understanding of groundwater resources. This report presents a tritium-based age classification system for the conterminous United States based on tritium (3H) thresholds that vary in space and time: modern (recharged in 1953 or later), if the measured value is...

Lindsey, Bruce D.; Jurgens, Bryant C.; Belitz, Kenneth
Lindsey, B.D., Jurgens, B.C., and Belitz, K., 2019, Tritium as an indicator of modern, mixed, and premodern groundwater age: U.S. Geological Survey Scientific Investigations Report 2019–5090, 18 p., https://doi.org/10.3133/sir20195090.

Filter Total Items: 248
USGS
October 1, 1998

Hurricane Georges extensively damaged the Chandeleur Islands, barrier islands approximately 60 miles east of New Orleans and 30 miles south of Biloxi, Mississippi. These islands are the first line of storm defense for eastern Louisiana, especially New Orleans, and western Mississippi.

USGS
December 16, 1997

A mysterious disease that has killed bald eagles and American coots in southwest Arkansas may now be present in two other states, according to wildlife disease specialists at the U.S. Geological Survey’s National Wildlife Health Center in Madison, Wisconsin.

USGS
September 17, 1997

A minor earthquake with a magnitude of 3.8 occurred near Jonesboro, Ark., early Wednesday afternoon (September 17), according to scientists at the U.S. Geological Survey in Golden, Colo.

USGS
November 21, 1996

The gasoline additive MTBE (methyl tert-butyl ether) was detected in some urban stormwater samples collected in 16 cities and metropolitan areas by the U.S. Geological Survey, but all detections of MTBE were less than the lower limit of the U.S. Environmental Protection Agency’s draft lifetime health advisory for drinking water.

USGS
September 4, 1996

The 350 employees of the U.S. Geological Survey’s Mid-Continent Mapping Center, U.S. Department of the Interior, received Vice President Al Gore’s Hammer Award in Rolla on September 4. The Mid-Continent Mapping Center employees were honored for their team-based approach to streamlining operations and making them more responsive to customers.

USGS
March 25, 1996

A minor earthquake with a preliminary estimated magnitude of 3.5 occurred in Clarke County, Mississippi, at 8:15 local time (9:15 EST) on March 25, according to the U.S. Geological Survey.

USGS
November 2, 1995

Patterns of sediment deposition near the mouth of the Mississippi River, traveling tar balls and the evolution of ancient marine lobsters into today’s Louisiana crayfish are a sampling of some of the earth-science topics that will be presented by scientists from the U.S. Geological Survey during a national science meeting in New Orleans next week.

USGS
June 9, 1995

Dr. Max M. Ethridge has been appointed Chief of the U.S. Geological Survey’s Mid-Continent Mapping Center in Rolla, Missouri.