Unified Interior Regions

Region 4: Mississippi Basin

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Year Published: 2020

Field observations of wind waves in Upper Delaware Bay with living shorelines

Constructed oyster reefs (CORs) provide shore protections and habitats for fish and shellfish communities via wave energy attenuation. However, the processes and mechanism of CORs on wave attenuation remain unclear, thus limiting the effective assessment of CORs for shoreline protection. This paper presents results of a field investigation on wave...

Zhu, Ling; Chen, Qin; Wang, Hongqing; Capurso, William D.; Niemoczynski, Lukasz; Hu, Kelin; Snedden, Gregg

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Year Published: 2020

Rapid peat development beneath created, maturing mangrove forests: Ecosystem changes across a 25-year chronosequence

Mangrove forests are among the world’s most productive and carbon‐rich ecosystems. Despite growing understanding of factors controlling mangrove forest soil carbon stocks, there is a need to advance understanding of the speed of peat development beneath maturing mangrove forests— especially in created and restored mangrove forests that are...

Osland, Michael J.; Feher, Laura C.; Spivak, Amanda C.; Nestlerode, Janet A.; Almario, Alejandro E.; Cormier, Nicole; From, Andrew; Krauss, Ken W.; Russell, Marc J.; Alvarez, Federico; Dantin, Darrin D.; Harvey, James E.; Stagg, Camille L.

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Year Published: 2020

Herpetofauna occupancy and community composition along a tidal swamp salinity gradient

Occupancy patterns of herpetofauna in most tidal freshwater swamps are unknown. Tidal freshwater swamps currently face multiple threats, including salinization, which can influence their associated plant and animal communities. The impacts of salinization to herpetofauna communities in tidal freshwater swamps have not been assessed. To improve...

Godfrey, Sidney T; Waddle, J. Hardin; Baldwin, Robert F; Conner, William H.; Bridges, William C; Duberstein, Jamie A.

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Year Published: 2020

Soil shear strength losses in two fresh marshes with variable increases in N and P loading

We measured soil shear strength (SSS) from 2009 to 2018 in two hydrologically distinct freshwater marshes dominated by Panicum hemitomon after nitrogen (N) and phosphorous (P) were applied to the surface in spring. The average SSS averaged over 100 cm depth in the floating and anchored marshes declined up to 30% throughout the profiles and with no...

Turner, R. Eugene; Swarzenski, Christopher M.; Bodker, James E.

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Year Published: 2020

Final Alabama Barrier Island restoration assessment report, appendix A: Data management plan

The Alabama Barrier Island Restoration Assessment project focused exclusively on Dauphin Island, a significant barrier island along the northern Gulf of Mexico. This restoration feasibility study effort required data collection and analysis of many data types (e.g., hydro, sediment, currents, etc.) through the project’s life cycle to assess...

Hunnicutt, Christina B.; Conzelmann, Craig

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Year Published: 2020

Recent evaluation of corbicula form D distribution in the Midwest, U.S.A

The genus Corbicula contains one of the most common and successful aquatic invasive species to North America. Prior to 2015 two predominant species of Corbicula were known from the United States—C. fluminea and C. largillierti, referred to as Forms A and B, respectively. Form A has spread throughout most of the U.S.,...

Douglass, Sarah; Reasor, Emily; Tiemann, Jeremy S.; Stodola, Alison; McMurray, Stephen E.; Poulton, Barry C.

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Year Published: 2020

Dunes in the world's big rivers are characterized by low-angle lee-side slopes and a complex shape

Dunes form critical agents of bedload transport in all of the world’s big rivers, and constitute appreciable sources of bed roughness and flow resistance. Dunes also generate stratification that is the most common depositional feature of ancient riverine sediments. However, current models of dune dynamics and stratification are conditioned by...

Cisneros, Julia; Best, Jim L.; van Dijk, Thaienne; de Almeida, Renato Paes; Amsler, Mario; Boldt, Justin A.; Freitas, Bernardo; Galeazzi, Cristiano; Huizinga, Richard J.; Ianniruberto, Marco; Ma, Hongbo; Nittrouer, Jeff; Oberg, Kevin; Orfeo, Oscar; Parsons, Daniel; Szupiany, Ricardo N.; Wang, Ping; Zhang, Yuanfeng

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Year Published: 2020

Shifts in hatching date of American crocodile (Crocodylus acutus) in southern Florida

Globally temperature of marine environments is on the rise and temperature plays an important role in the life-history of reptiles. In this study, we examined the relationship between sea surface temperature and average date of hatching for American crocodiles (Crocodylus acutus) over a 37-year period at two nesting sites, Everglades National Park...

Cherkiss, Michael; Watling, James I.; Brandt, Laura A.; Mazzotti, Frank J.; Linsay, Jim; Beauchamp, Jeffrey S.; Lorenz, Jerome J.; Wasilewski, Joseph; Fujisaki, Ikuko; Hart, Kristen

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Year Published: 2020

The use of support vectors from support vector machines for hydrometeorologic monitoring network analyses

Hydrometeorologic monitoring networks are ubiquitous in contemporary earth-system science. Network stakeholders often inquire about the importance of sites and their locations when discussing funding and monitoring design. Support vector machines (SVMs) can be useful by their assigning each monitoring site as either a support or nonsupport vector...

Asquith, William H.

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Year Published: 2020

Soil surface elevation dynamics in a mangrove-to-marsh ecotone characterized by vegetation shifts

Mangrove forest encroachment into coastal marsh habitats has been described in subtropical regions worldwide in recent decades. To better understand how soil processes may influence vegetation change, we studied soil surface elevation change, accretion rates, and soil subsurface change across a coastal salinity gradient in Florida, USA, an area...

Howard, Rebecca J.; From, Andrew; Krauss, Ken W.; Andres, Kimberly D.; Cormier, Nicole; Allain, Larry K.; Savarese, Michael

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Year Published: 2020

Pulsed flow-through auto-feeding beaker systems for the laboratory culture of juvenile freshwater mussels

Newly metamorphosed freshwater mussels are small and delicate, so that captive laboratory culture presents challenges for handling; for maintenance of suitable microhabitat, water quality, and food; and for avoidance of competitors and predators. To address these challenges, a new pulsed flow-through auto-feeding beaker system was developed for...

Kunz, James L.; Brunson, Eric; Barnhart, M. Christopher; Glidewell, Elizabeth A.; Wang, Ning; Ingersoll, Christopher G.

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Year Published: 2020

Fluxes of agricultural nitrogen and metolachlor metabolites are highly correlated in a first order stream in Maryland, USA

Nitrogen pollution in watersheds containing significant cropland area is generally problematic. Conservation practices intended to reduce nitrate-N (NO3--N) export from watersheds are being implemented by many regions without necessary tools to assess effectiveness of these abatement tools. A commonly used herbicide metolachlor degrades in the...

Rice, Cliff; Hively, W. Dean; McCarty, Gregory W.; Hapeman, Cathleen

Filter Total Items: 247
USGS
October 1, 1998

Aerial flights on Tuesday, two days after Hurricane Georges hit the Mississippi Gulf Coast, revealed what one scientist called the worst damage to the Chandeleur Islands that he had seen in more than a decade.

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.