Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10351
A preliminary assessment of streamflow gains and losses for selected stream reaches in the lower Guadalupe River Basin, Texas, 2010-12 A preliminary assessment of streamflow gains and losses for selected stream reaches in the lower Guadalupe River Basin, Texas, 2010-12
The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers–Fort Worth District, the Texas Water Development Board, the Guadalupe-Blanco River Authority, and the Edwards Aquifer Authority, investigated streamflow gains and losses in the lower Guadalupe River Basin during four selected base-flow periods in March 2010, April 2011, August 2011, and, for a stream reach...
Authors
Loren L. Wehmeyer, Karl E. Winters, Darwin J. Ockerman
Chronic toxicity of nickel-spiked freshwater sediments: variation in toxicity among eight invertebrate taxa and eight sediments Chronic toxicity of nickel-spiked freshwater sediments: variation in toxicity among eight invertebrate taxa and eight sediments
This study evaluated the chronic toxicity of Ni-spiked freshwater sediments to benthic invertebrates. A 2-step spiking procedure (spiking and sediment dilution) and a 2-stage equilibration period (10 wk anaerobic and 1 wk aerobic) were used to spike 8 freshwater sediments with wide ranges of acid-volatile sulfide (AVS; 0.94–38 µmol/g) and total organic carbon (TOC; 0.42–10%). Chronic...
Authors
John M. Besser, William G. Brumbaugh, Christopher G. Ingersoll, Chris D. Ivey, James L. Kunz, Nile E. Kemble, Christian E. Schlekat, Emily R. Garman
Assaying environmental nickel toxicity using model nematodes Assaying environmental nickel toxicity using model nematodes
Although nickel exposure results in allergic reactions, respiratory conditions, and cancer in humans and rodents, the ramifications of excess nickel in the environment for animal and human health remain largely undescribed. Nickel and other cationic metals travel through waterways and bind to soils and sediments. To evaluate the potential toxic effects of nickel at environmental...
Authors
David Rudel, Chandler Douglas, Ian Huffnagle, John M. Besser, Christopher G. Ingersoll
Functional diversity supports the physiological tolerance hypothesis for plant species richness along climatic gradients Functional diversity supports the physiological tolerance hypothesis for plant species richness along climatic gradients
1. The physiological tolerance hypothesis proposes that plant species richness is highest in warm and/or wet climates because a wider range of functional strategies can persist under such conditions. Functional diversity metrics, combined with statistical modeling, offer new ways to test whether diversity-environment relationships are consistent with this hypothesis. 2. In a classic...
Authors
Marko J. Spasojevic, James B. Grace, Susan Harrison, Ellen Ingman Damschen
Circulation, mixing, and transport in nearshore Lake Erie in the vicinity of Villa Angela Beach and Euclid Creek, Cleveland, Ohio, September 11-12, 2012 Circulation, mixing, and transport in nearshore Lake Erie in the vicinity of Villa Angela Beach and Euclid Creek, Cleveland, Ohio, September 11-12, 2012
Villa Angela Beach, on the Lake Erie lakeshore near Cleveland, Ohio, is adjacent to the mouth of Euclid Creek, a small, flashy stream draining approximately 23 square miles and susceptible to periodic contamination from combined sewer overflows (CSOs) (97 and 163 CSO events in 2010 and 2011, respectively). Concerns over high concentrations of Escherichia coli (E. coli) in water samples...
Authors
P. Ryan Jackson
Ecological limit functions relating fish community response to hydrologic departures of the ecological flow regime in the Tennessee River basin, United States Ecological limit functions relating fish community response to hydrologic departures of the ecological flow regime in the Tennessee River basin, United States
Ecological limit functions relating streamflow and aquatic ecosystems remain elusive despite decades of research. We investigated functional relationships between species richness and changes in streamflow characteristics at 662 fish sampling sites in the Tennessee River basin. Our approach included the following: (1) a brief summary of relevant literature on functional relations between...
Authors
Rodney R. Knight, Jennifer C. Murphy, William J. Wolfe, Charles F. Saylor, Amy K. Wales
Detections, concentrations, and distributional patterns of compounds of emerging concern in the San Antonio River Basin, Texas, 2011-12 Detections, concentrations, and distributional patterns of compounds of emerging concern in the San Antonio River Basin, Texas, 2011-12
During 2011–12, the U.S. Geological Survey, in cooperation with the San Antonio River Authority, evaluated detections, concentrations, and distributional patterns of selected compounds of emerging concern (hereinafter referred to as “CECs”) from water-quality samples (hereinafter referred to as “samples”) collected at a total of 20 sampling sites distributed throughout the San Antonio...
Authors
Stephen P. Opsahl, Rebecca B. Lambert
Integrated carbon budget models for the Everglades terrestrial-coastal-oceanic gradient: Current status and needs for inter-site comparisons Integrated carbon budget models for the Everglades terrestrial-coastal-oceanic gradient: Current status and needs for inter-site comparisons
Recent studies suggest that coastal ecosystems can bury significantly more C than tropical forests, indicating that continued coastal development and exposure to sea level rise and storms will have global biogeochemical consequences. The Florida Coastal Everglades Long Term Ecological Research (FCE LTER) site provides an excellent subtropical system for examining carbon (C) balance...
Authors
Tiffany G. Troxler, Evelyn Gaiser, Jordan Barr, Jose D. Fuentes, Rudolf Jaffe, Daniel L. Childers, Ligia Collado-Vides, Victor H. Rivera-Monroy, Edward Castañeda-Moya, William Anderson, Randy Chambers, Meilian Chen, Carlos Coronado-Molina, Stephen E. Davis, Victor C. Engel, Carl Fitz, James Fourqurean, Tom Frankovich, John Kominoski, Chris Madden, Sparkle L. Malone, Steve F. Oberbauer, Paulo Olivas, Jennifer Richards, Colin Saunders, Jessica Schedlbauer, Leonard J. Scinto, Fred Sklar, Thomas J. Smith, Joseph M. Smoak, Gregory Starr, Robert Twilley, Kevin Whelan
Origin and characteristics of discharge at San Marcos Springs, south-central Texas Origin and characteristics of discharge at San Marcos Springs, south-central Texas
The Edwards aquifer in south-central Texas is one of the most productive aquifers in the Nation and is the primary source of water for the rapidly growing San Antonio area. Springs issuing from the Edwards aquifer provide habitat for several threatened and endangered species, serve as locations for recreational activities, and supply downstream users. Comal Springs and San Marcos Springs...
Authors
MaryLynn Musgrove, Cassi L. Crow
Annual exceedance probabilities of the peak discharges of 2011 at streamgages in Vermont and selected streamgages in New Hampshire, western Massachusetts, and northeastern New York Annual exceedance probabilities of the peak discharges of 2011 at streamgages in Vermont and selected streamgages in New Hampshire, western Massachusetts, and northeastern New York
The U.S. Geological Survey, in cooperation with the Federal Emergency Management Agency, determined annual exceedance probabilities for peak discharges occurring during the 2011 water year (October 1 to September 30) at streamgages in Vermont and selected streamgages in New Hampshire, western Massachusetts, and northeastern New York. This report presents the 2011 water year peak...
Authors
Scott A. Olson, Gardner C. Bent
ECALS: Loading studies interim report October 2013 ECALS: Loading studies interim report October 2013
Here we follow up the loading studies interim report from July 2013 and include results from laboratory studies assessing the effects of diet on eDNA shedding rates by bigheaded carps(silver and bighead carp). In order to understand how eDNA behavesin the environment, we must understand how it enters the system. In our July interim report, we addressed three of our four hypotheses that...
Authors
Katy Klymus, Cathy Richter, Duane Chapman, Craig P. Paukert
Predicting the effects of proposed Mississippi River diversions on oyster habitat quality; application of an oyster habitat suitability index model Predicting the effects of proposed Mississippi River diversions on oyster habitat quality; application of an oyster habitat suitability index model
In an attempt to decelerate the rate of coastal erosion and wetland loss, and protect human communities, the state of Louisiana developed its Comprehensive Master Plan for a Sustainable Coast. The master plan proposes a combination of restoration efforts including shoreline protection, marsh creation, sediment diversions, and ridge, barrier island, and hydrological restoration. Coastal...
Authors
Thomas M. Soniat, Craig P. Conzelmann, Jason D. Byrd, Dustin P. Roszell, Joshua L. Bridevaux, Kevin J. Suir, Susan B. Colley