Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5565
Passive seismic survey of sediment thickness, Dasht-e-Nawar basin, eastern Afghanistan Passive seismic survey of sediment thickness, Dasht-e-Nawar basin, eastern Afghanistan
Exploration of water resources is needed for public supply, extraction of mineral resources, and economic development in Afghanistan. Remotely-sensed data are useful for identifying the general nature of surface sediments, however, “boots on the ground” geophysical surveys or drilling programs are needed to quantify the thickness of sediments or aquifers. The nature of such...
Authors
Thomas J. Mack
Identification of Acara (Cichlidae: Cichlasoma) established in Florida, USA Identification of Acara (Cichlidae: Cichlasoma) established in Florida, USA
The Black Acara, Cichlasoma bimaculatum (Linnaeus, 1758), was first reported as introduced to Florida in 1965. Native to Venezuela, Guyana, Suriname, western French Guiana, and northern Brazil, the species is now distributed throughout Florida’s southern peninsula. Examination of live and preserved acara from Central Florida, heretofore identified as Black Acara, reveal the presence of...
Authors
Robert H Robins, Mary E. Brown, Ryan A Crutchfield
Field observations of wind waves in Upper Delaware Bay with living shorelines 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 characteristics and wave spectral...
Authors
Ling Zhu, Q. Chen, Hongqing Wang, William D. Capurso, L.M. Niemoczynski, Kelin Hu, Gregg Snedden
Rapid peat development beneath created, maturing mangrove forests: Ecosystem changes across a 25-year chronosequence 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 intended to compensate for ecosystem functions...
Authors
Michael J. Osland, Laura C. Feher, Amanda C. Spivak, Janet A. Nestlerode, Alejandro E. Almario, Nicole Cormier, Andrew From, Ken W. Krauss, Marc J. Russell, Federico Alvarez, Darrin D. Dantin, James E. Harvey, Camille L. Stagg
Herpetofauna occupancy and community composition along a tidal swamp salinity gradient 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 predictions regarding these herpetofauna, we...
Authors
Sidney T Godfrey, J. Hardin Waddle, Robert F Baldwin, William H. Conner, William C Bridges, Jamie A. Duberstein
Soil shear strength losses in two fresh marshes with variable increases in N and P loading 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 apparent differences in the effects of...
Authors
R. Eugene Turner, Christopher M. Swarzenski, James E. Bodker
Final Alabama Barrier Island restoration assessment report, appendix A: Data management plan 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 restoration measures and their effects on the
Authors
Christina B. Hunnicutt, Craig Conzelmann
Recent evaluation of corbicula form D distribution in the Midwest, U.S.A 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., while Form B is mainly contained in the Midwest and southern U.S. In...
Authors
Sarah Douglass, Emily Reasor, Jeremy S. Tiemann, Alison Stodola, Stephen E. McMurray, Barry C. Poulton
Dunes in the world's big rivers are characterized by low-angle lee-side slopes and a complex shape 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 bedform geometries observed in small rivers...
Authors
Julia Cisneros, Jim L. Best, Thaienne van Dijk, Renato Paes de Almeida, Mario Amsler, Justin A. Boldt, Bernardo Freitas, Cristiano Galeazzi, Richard J. Huizinga, Marco Ianniruberto, Hongbo Ma, Jeff Nittrouer, Kevin Oberg, Oscar Orfeo, Daniel Parsons, Ricardo N. Szupiany, Ping Wang, Yuanfeng Zhang
Shifts in hatching date of American crocodile (Crocodylus acutus) in southern Florida 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 and Florida Power and Light Turkey Point...
Authors
Michael Cherkiss, James I. Watling, Laura A. Brandt, Frank J. Mazzotti, Jim Linsay, Jeffrey S. Beauchamp, Jerome J. Lorenz, Joseph Wasilewski, Ikuko Fujisaki, Kristen Hart
The use of support vectors from support vector machines for hydrometeorologic monitoring network analyses 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. A potentiometric surface was created...
Authors
William H. Asquith
Soil surface elevation dynamics in a mangrove-to-marsh ecotone characterized by vegetation shifts 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 with documented mangrove encroachment into...
Authors
Rebecca J. Howard, Andrew From, Ken W. Krauss, Kimberly D. Andres, Nicole Cormier, Larry K. Allain, Michael Savarese