Publications
Read publications and other informational products to learn more about USGS science occurring in the Mississippi Basin.
Filter Total Items: 5583
Carbon cycling in the mantled karst of the Ozark Plateaus, central United States Carbon cycling in the mantled karst of the Ozark Plateaus, central United States
The nature of carbon (C) cycling in the unsaturated zone where groundwater is in contact with abundant gas-filled voids is poorly understood. The objective of this study was to trace inorganic-C cycling in a karst landscape using stable-C isotopes, with emphasis on a shallow groundwater flow path through the soil, to an underlying cave, and to the spring outlet of a cave stream in the...
Authors
Katherine J. Knierim, Erik D. Pollock, Matthew D. Covington, Phillip D. Hays, Kristofor R. Brye
Similarity of plant functional traits and aggregation pattern in a subtropical forest Similarity of plant functional traits and aggregation pattern in a subtropical forest
The distribution of species and communities in relation to environmental heterogeneity is a central focus in ecology. Co-occurrence of species with similar functional traits is an indication that communities are determined in part by environmental filters. However, few studies have been designed to test how functional traits are selectively filtered by environmental conditions at local...
Authors
Bo Zhang, Xiaozhen Lu, Jiang Jiang, Donald L. DeAngelis, Zhiyuan Fu, Jinchi Zhang
Book review: Biology and management of invasive quagga and zebra mussels in the western United States Book review: Biology and management of invasive quagga and zebra mussels in the western United States
Water is a precious and limited commodity in the western United States and its conveyance is extremely important. Therefore, it is critical to do as much as possible to prevent the spread of two species of dreissenid mussels, both non-native and highly invasive aquatic species already well-established in the eastern half of the United States. This book addresses the occurrences of the...
Authors
Amy J. Benson
Causal mechanisms of soil organic matter decomposition: Deconstructing salinity and flooding impacts in coastal wetlands Causal mechanisms of soil organic matter decomposition: Deconstructing salinity and flooding impacts in coastal wetlands
Coastal wetlands significantly contribute to global carbon storage potential. Sea-level rise and other climate change-induced disturbances threaten coastal wetland sustainability and carbon storage capacity. It is critical that we understand the mechanisms controlling wetland carbon loss so that we can predict and manage these resources in anticipation of climate change. However, our...
Authors
Camille L. Stagg, Donald Schoolmaster, Ken W. Krauss, Nicole Cormier, William H. Conner
In some places, in some cases, and at some times, harmful algal blooms are the greatest threat to inland water quality In some places, in some cases, and at some times, harmful algal blooms are the greatest threat to inland water quality
No abstract available.
Authors
Bryan W. Brooks, James M. Lazorchak, Meredith D.A. Howard, Mari-Vaughn V. Johnson, Steve L. Morton, Dawn A.K. Perkins, Euan D. Reavie, Geoffrey L. Scott, Stephanie A. Smith, Jeffery A. Steevens
Arsenic and uranium in private wells in Connecticut, 2013-15 Arsenic and uranium in private wells in Connecticut, 2013-15
The occurrence of arsenic and uranium in groundwater at concentrations that exceed drinking-water standards is a concern because of the potential adverse effects on human health. Some early studies of arsenic occurrence in groundwater considered anthropogenic causes, but more recent studies have focused on sources of naturally occurring arsenic to groundwater, such as minerals within...
Authors
Sarah M. Flanagan, Craig J. Brown
How do en route events around the Gulf of Mexico influence landbird populations How do en route events around the Gulf of Mexico influence landbird populations
Habitats around the Gulf of Mexico (GOM) provide critical resources for Nearctic–Neotropical migratory landbirds, the majority of which travel across or around the GOM every spring and fall as they migrate between temperate breeding grounds in North America and tropical wintering grounds in the Caribbean and Central and South America. At the same time, ecosystems in the GOM are changing...
Authors
Emily B. Cohen, Wylie C. Barrow, Jeffrey J. Buler, Jill L. Deppe, Andrew Farnsworth, Peter P. Marra, Scott R. McWilliams, David W Mehlman, R. Randy Wilson, Mark S Woodrey, Frank R. Moore
Tropical river suspended sediment and solute dynamics in storms during an extreme drought Tropical river suspended sediment and solute dynamics in storms during an extreme drought
Droughts, which can strongly affect both hydrologic and biogeochemical systems, are projected to become more prevalent in the tropics in the future. We assessed the effects of an extreme drought during 2015 on stream water composition in the Luquillo Mountains of Puerto Rico. We demonstrated that drought base flow in the months leading up to the study was sourced from trade-wind...
Authors
Kathryn E. Clark, James B. Shanley, Martha A. Scholl, Nicolas Perdrial, Julia N. Perdrial, Alain F. Plante, William H. McDowell
The history of mercury pollution near the Spolana chlor-alkali plant (Neratovice, Czech Republic) as recorded by Scots pine tree rings and other bioindicators The history of mercury pollution near the Spolana chlor-alkali plant (Neratovice, Czech Republic) as recorded by Scots pine tree rings and other bioindicators
We assessed > 100 years of mercury (Hg) pollution recorded in the tree rings of Scots Pine near a Czech chlor-alkali plant operating since 1941. Hg concentrations in tree rings increased with the launching of plant operations and decreased when Hg emissions decreased in 1975 due to an upgrade in production technology. Similar to traditional bioindicators of pollution such as pine needles...
Authors
Tomáš Navrátil, Martin Simecek, James B. Shanley, Jan Rohovec, Maria Hojdova, Jakub Houska
Guidelines for preparation of State water-use estimates for 2015 Guidelines for preparation of State water-use estimates for 2015
The U.S. Geological Survey (USGS) has estimated the use of water in the United States at 5-year intervals since 1950. This report describes the water-use categories and data elements used for the national water-use compilation conducted as part of the USGS National Water-Use Science Project. The report identifies sources of water-use information, provides standard methods and techniques...
Freshwater mussels (Unionidae): Central and West Texas Final Report Freshwater mussels (Unionidae): Central and West Texas Final Report
The goal of this study was two-fold: (1) assess the taxonomic identity and phylogenetic placement of Quadrula aurea (Golden Orb) [Federal Candidate], Quadrula houstonensis (Smooth Pimpleback) [Federal Candidate], and Quadrula petrina (Texas Pimpleback) [Federal Candidate] through mitochondrial and nuclear DNA sequencing; and (2) provided additional information on the distribution and...
Authors
Charles R. Randklev, Nathan Johnson, T. J. Miller, J.M. Morton, J. Dudding, K. Skow, B. Boseman, M. Hart, E.T. Tsakiris, K. Inoue, R.R. Lopez
Ecological regime shift drives declining growth rates of sea turtles throughout the West Atlantic Ecological regime shift drives declining growth rates of sea turtles throughout the West Atlantic
Somatic growth is an integrated, individual-based response to environmental conditions, especially in ectotherms. Growth dynamics of large, mobile animals are particularly useful as bio-indicators of environmental change at regional scales. We assembled growth rate data from throughout the West Atlantic for green turtles, Chelonia mydas, which are long-lived, highly migratory, primarily
Authors
Karen A. Bjorndal, Alan B. Bolten, Milani Chaloupka, Vincent S. Saba, Claudio Bellini, Maria A.G. Marcovaldi, Armando J.B. Santos, Luis Felipe Wurdig Bortolon, Anne B. Meylan, Peter A. Meylan, Jennifer Gray, Robert Hardy, Beth Brost, Michael Bresette, Jonathan C. Gorham, Stephen Connett, Barbara Van Sciver Crouchley, Mike Dawson, Deborah Hayes, Carlos E. Diez, Robert P. van Dam, Sue Willis, Mabel Nava, Kristen M. Hart, Michael S. Cherkiss, Andrew Crowder, Clayton Pollock, Zandy Hillis-Starr, Fernando A. Munoz Teneria, Roberto Herrera-Pavon, Vanessa Labrada-Martagon, Armando Lorences, Ana Negrete-Philippe, Margaret M. Lamont, Allen M. Foley, Rhonda Bailey, Raymond R. Carthy, Russell Scarpino, Erin McMichael, Jane A. Provancha, Annabelle Brooks, Adriana Jardim, Milagros Lopez-Mendilaharsu, Daniel Gonzalez-Paredes, Andres Estrades, Alejandro Fallabrino, Gustavo Martinez-Souza, Gabriela M. Velez-Rubio, Ralf H. Boulon, Jaime Collazo, Robert Wershoven, Vicente Guzman Hernandez, Thomas B. Stringell, Amdeep Sanghera, Peter B. Richardson, Annette C. Broderick, Quinton Phillips, Marta C. Calosso, John A.B. Claydon, Tasha L. Metz, Amanda L. Gordon, Andre M. Landry, Donna J. Shaver, Janice Blumenthal, Lucy Collyer, Brendan J. Godley, Andrew McGowan, Matthew J. Witt, Cathi L. Campbell, Cynthia J. Lagueux, Thomas L. Bethel, Lory Kenyon