Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5585
Water-level trends and potentiometric surfaces in the Nacatoch Aquifer in northeastern and southwestern Arkansas and in the Tokio Aquifer in southwestern Arkansas, 2014–15 Water-level trends and potentiometric surfaces in the Nacatoch Aquifer in northeastern and southwestern Arkansas and in the Tokio Aquifer in southwestern Arkansas, 2014–15
The Nacatoch Sand in northeastern and southwestern Arkansas and the Tokio Formation in southwestern Arkansas are sources of groundwater for agricultural, domestic, industrial, and public use. Water-level altitudes measured in 51 wells completed in the Nacatoch Sand and 42 wells completed in the Tokio Formation during 2014 and 2015 were used to create potentiometric-surface maps of the...
Authors
Kirk D. Rodgers
The extremely divergent maternally- and paternally-transmitted mitochondrial genomes are co-expressed in somatic tissues of two freshwater mussel species with doubly uniparental inheritance of mtDNA The extremely divergent maternally- and paternally-transmitted mitochondrial genomes are co-expressed in somatic tissues of two freshwater mussel species with doubly uniparental inheritance of mtDNA
Freshwater mussel species with doubly uniparental inheritance (DUI) of mtDNA are unique because they are naturally heteroplasmic for two extremely divergent mtDNAs with ~50% amino acid differences for protein-coding genes. The paternally-transmitted mtDNA (or M mtDNA) clearly functions in sperm in these species, but it is still unknown whether it is transcribed when present in male or...
Authors
Sophie Breton, Karim Bouvet, Gabrielle Auclair, Stephanie Ghazal, Bernard E. Sietman, Nathan A. Johnson, Stefano Bettinazzi, Donald T. Dtewart, Davide Guerra
Fatal attraction? Intraguild facilitation and suppression among predators Fatal attraction? Intraguild facilitation and suppression among predators
Competition and suppression are recognized as dominant forces that structure predator communities. Facilitation via carrion provisioning, however, is a ubiquitous interaction among predators that could offset the strength of suppression. Understanding the relative importance of these positive and negative interactions is necessary to anticipate community-wide responses to apex predator...
Authors
Kelly J. Sivy, Casey B. Pozzanghera, James B. Grace, Laura R. Prugh
Observations of raccoon (Procyon lotor) predation on the invasive Maculata apple snail (Pomacea maculata) in southern Louisiana Observations of raccoon (Procyon lotor) predation on the invasive Maculata apple snail (Pomacea maculata) in southern Louisiana
We used camera traps to determine which predators were responsible for depredated Pomacea maculata (Maculata Apple Snail) shells at 2 different study sites. Evidence of predation at these sites included operculums near the shells with a small amount of flesh attached and shells accumulating a meter or more from the water’s edge with no evidence of recent flooding. In both locations, the...
Authors
Jacoby Carter, Sergio Merino, Drew Prejean, Gary LaFleur
Assessing coastal wetland vulnerability to sea-level rise along the northern Gulf of Mexico coast: Gaps and opportunities for developing a coordinated regional sampling network Assessing coastal wetland vulnerability to sea-level rise along the northern Gulf of Mexico coast: Gaps and opportunities for developing a coordinated regional sampling network
Coastal wetland responses to sea-level rise are greatly influenced by biogeomorphic processes that affect wetland surface elevation. Small changes in elevation relative to sea level can lead to comparatively large changes in ecosystem structure, function, and stability. The surface elevation table-marker horizon (SET-MH) approach is being used globally to quantify the relative...
Authors
Michael J. Osland, Kereen T. Griffith, Jack C. Larriviere, Laura C. Feher, Donald R. Cahoon, Nicholas M. Enwright, David A. Oster, John M. Tirpak, Mark S. Woodrey, Renee C. Collini, Joseph J. Baustian, Joshua L. Breithaupt, Julia A Cherry, Jeremy R. Conrad, Nicole Cormier, Carlos A. Coronado-Molina, Joseph F. Donoghue, Sean A. Graham, Jennifer W. Harper, Mark W. Hester, Rebecca J. Howard, Ken W. Krauss, Daniel Kroes, Robert R. Lane, Karen L. McKee, Irving A. Mendelssohn, Beth A. Middleton, Jena A. Moon, Sarai Piazza, Nicole M. Rankin, Fred H. Sklar, Gregory D. Steyer, Kathleen M. Swanson, Christopher M. Swarzenski, William Vervaeke, Jonathan M Willis, K. Van Wilson
Holistic assessment of occurrence and fate of metolachlor within environmental compartments of agricultural watersheds Holistic assessment of occurrence and fate of metolachlor within environmental compartments of agricultural watersheds
Background: Metolachlor [(RS)-2-Chloro-N-(2-ethyl-6-methyl-phenyl)-N-(1-methoxypropan-2-yl)acetamide] and two degradates (metolachlor ethane-sulfonic acid and metolachlor oxanilic acid) are commonly observed in surface and groundwater. The behavior and fate of these compounds were examined over a 12-year period in seven agricultural watersheds in the United States. They were quantified...
Authors
Claire E. Rose, Richard H. Coupe, Paul D. Capel, Richard M. Webb
The state of the world’s mangroves in the 21st century under climate change The state of the world’s mangroves in the 21st century under climate change
Concerted mangrove research and rehabilitation efforts over the last several decades have prompted a better understanding of the important ecosystem attributes worthy of protection and a better conservation ethic toward mangrove wetlands globally. While mangroves continue to be degraded and lost in specific regions, conservation initiatives, rehabilitation efforts, natural regeneration...
Authors
Ilka C. Feller, Daniel A. Friess, Ken W. Krauss, Roy R. Lewis
A reservoir morphology database for the conterminous United States A reservoir morphology database for the conterminous United States
The U.S. Geological Survey, in cooperation with the Reservoir Fisheries Habitat Partnership, combined multiple national databases to create one comprehensive national reservoir database and to calculate new morphological metrics for 3,828 reservoirs. These new metrics include, but are not limited to, shoreline development index, index of basin permanence, development of volume, and other
Authors
Kirk D. Rodgers
Loads and yields of deicing compounds and total phosphorus in the Cambridge drinking-water source area, Massachusetts, water years 2009–15 Loads and yields of deicing compounds and total phosphorus in the Cambridge drinking-water source area, Massachusetts, water years 2009–15
The source water area for the drinking-water supply of the city of Cambridge, Massachusetts, encompasses major transportation corridors, as well as large areas of light industrial, commercial, and residential land use. Because of the large amount of roadway in the drinking-water source area, the Cambridge water supply is affected by the usage of deicing compounds and by other...
Authors
Kirk P. Smith
Effects of tow transit on the efficacy of the Chicago Sanitary and Ship Canal Electric Dispersal Barrier System Effects of tow transit on the efficacy of the Chicago Sanitary and Ship Canal Electric Dispersal Barrier System
In 2016, the U.S. Fish and Wildlife Service, U.S. Geological Survey, and U.S. Army Corps of Engineers undertook a field study in the Chicago Sanitary and Ship Canal near Romeoville, Illinois to determine the influence of tow transit on the efficacy of the Electric Dispersal Barrier System (EDBS) in preventing the passage of juvenile fish (total length
Authors
Jeremiah J. Davis, Jessica Z. LeRoy, Matthew R. Shanks, Patrick Ryan Jackson, Frank L. Engel, Elizabeth A. Murphy, Carey L. Baxter, Michael K. McInerney, Nicholas A. Barkowski
Management implications of broadband sound in modulating wild silver carp (Hypophthalmichthys molitrix) behavior Management implications of broadband sound in modulating wild silver carp (Hypophthalmichthys molitrix) behavior
Invasive silver carp (Hypophthalmichthys molitrix) dominate large regions of the Mississippi River drainage, outcompete native species, and are notorious for their prolific and unusual jumping behavior. High densities of juvenile and adult (~25 kg) carp are known to jump up to 3 m above the water surface in response to moving watercraft. Broadband sound recorded from an outboard motor...
Authors
Brooke J. Vetter, Robin D. Calfee, Allen F. Mensinger
Pathogenic lineage of Perkinsea associated with mass mortality of frogs across the United States Pathogenic lineage of Perkinsea associated with mass mortality of frogs across the United States
Emerging infectious diseases such as chytridiomycosis and ranavirus infections are important contributors to the worldwide decline of amphibian populations. We reviewed data on 247 anuran mortality events in 43 States of the United States from 1999–2015. Our findings suggest that a severe infectious disease of tadpoles caused by a protist belonging to the phylum Perkinsea might represent...
Authors
Marcos Isidoro Ayza, Jeffrey M. Lorch, Daniel A. Grear, Megan Winzeler, Daniel L. Calhoun, William J. Barichivich