Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10380
Spectral definition of the macro-algae Ulva curvata in the back-barrier bays of the Eastern Shore of Virginia, USA Spectral definition of the macro-algae Ulva curvata in the back-barrier bays of the Eastern Shore of Virginia, USA
We have developed methods to determine the visible (VIS) to near-infrared (NIR) spectral properties of thalli and epiphytes of bloom-forming and green macrophyte Ulva curvata in back-barrier lagoons in Virginia, USA. A 2% increase in NIR thalli reflectance from winter to summer (ca. 9.5%) matched the drop in summer NIR transmittance (ca. 90%). In contrast, summer and winter VIS...
Authors
E. Ramsey, A. Rangoonwalaj, M.S. Thomsen, A. Schwarzschild
Patterns of metal composition and biological condition and their association in male common carp across an environmental contaminant gradient in Lake Mead National Recreation Area, Nevada and Arizona, USA Patterns of metal composition and biological condition and their association in male common carp across an environmental contaminant gradient in Lake Mead National Recreation Area, Nevada and Arizona, USA
There is a contaminant gradient in Lake Mead National Recreation Area (LMNRA) that is partly driven by municipal and industrial runoff and wastewater inputs via Las Vegas Wash (LVW). Adult male common carp (Cyprinus carpio; 10 fish/site) were collected from LVW, Las Vegas Bay (receiving LVW flow), Overton Arm (OA, upstream reference), and Willow Beach (WB, downstream) in March 2008...
Authors
Reynaldo Patino, Michael R. Rosen, E.L. Orsak, Steven L. Goodbred, Thomas W. May, David A. Alvarez, Kathy R. Echols, Carla M. Wieser, Shane Ruessler, L. Torres
Response of salt marsh and mangrove wetlands to changes in atmospheric CO2, climate, and sea-level Response of salt marsh and mangrove wetlands to changes in atmospheric CO2, climate, and sea-level
Coastal salt marsh and mangrove ecosystems are particularly vulnerable to changes in atmospheric CO2 concentrations and associated climate and climate-induced changes. We provide a review of the literature detailing theoretical predictions and observed responses of coastal wetlands to a range of climate change stressors, including CO2, temperature, rainfall, and sea-level rise. This...
Authors
Karen L. McKee, Kerrylee Rogers, Neil Saintilan
Ecological controls on the shell geochemistry of pink and white Globigerinoides ruber in the northern Gulf of Mexico: implications for paleoceanographic reconstruction Ecological controls on the shell geochemistry of pink and white Globigerinoides ruber in the northern Gulf of Mexico: implications for paleoceanographic reconstruction
We evaluate the relationship between foraminiferal test size and shell geochemistry (δ13C, δ18O, and Mg/Ca) for two of the most commonly used planktonic foraminifers for paleoceanographic reconstruction in the subtropical Atlantic Ocean: the pink and white varieties of Globigerinoides ruber. Geochemical analyses were performed on foraminifera from modern core-top samples of high...
Authors
Julie N. Richey, Richard Z. Poore, Benjamin P. Flower, David J. Hollander
Ambystoma maculatum (spotted salamander). Reproduction Ambystoma maculatum (spotted salamander). Reproduction
No abstract avaailable.
Authors
Brad M. Glorioso, Hardin Waddle, Jeromi Hefner
Tidally driven export of dissolved organic carbon, total mercury, and methylmercury from a mangrove-dominated estuary Tidally driven export of dissolved organic carbon, total mercury, and methylmercury from a mangrove-dominated estuary
The flux of dissolved organic carbon (DOC) from mangrove swamps accounts for 10% of the global terrestrial flux of DOC to coastal oceans. Recent findings of high concentrations of mercury (Hg) and methylmercury (MeHg) in mangroves, in conjunction with the common co-occurrence of DOC and Hg species, have raised concerns that mercury fluxes may also be large. We used a novel approach to...
Authors
Brian A. Bergamaschi, D. P. Krabbenhoft, George Aiken, Eduardo Patino, D.G. Rumbold, William H. Orem
Sand grain sources at coral reefs indicate reef health Sand grain sources at coral reefs indicate reef health
No abstract available.
Authors
Barbara H. Lidz
Outlier reefs are found off the Florida Keys Outlier reefs are found off the Florida Keys
No abstract available.
Authors
Barbara H. Lidz
Many other plants grow in mangrove forests too! Many other plants grow in mangrove forests too!
No abstract available.
Authors
Thomas J. Smith
Simulating the effect of climate extremes on groundwater flow through a lakebed Simulating the effect of climate extremes on groundwater flow through a lakebed
Groundwater exchanges with lakes resulting from cyclical wet and dry climate extremes maintain lake levels in the environment in ways that are not well understood, in part because they remain difficult to simulate. To better understand the atypical groundwater interactions with lakes caused by climatic extremes, an original conceptual approach is introduced using MODFLOW-2005 and a...
Authors
Makhan L. Virdi, Terrie M. Lee, Amy Swancar, Richard G. Niswonger
Low-flow frequency and flow duration of selected South Carolina streams in the Saluda, Congaree, and Edisto River basins through March 2009 Low-flow frequency and flow duration of selected South Carolina streams in the Saluda, Congaree, and Edisto River basins through March 2009
Part of the mission of the South Carolina Department of Health and Environmental Control and the South Carolina Department of Natural Resources is to protect and preserve South Carolina's water resources. Doing so requires an ongoing understanding of streamflow characteristics of the rivers and streams in South Carolina. A particular need is information concerning the low-flow...
Authors
Toby D. Feaster, Wladmir B. Guimaraes
Sirenian pathology and mortality assessment Sirenian pathology and mortality assessment
No abstract available.
Authors
Robert K. Bonde, Antonio A. Mignucci-Ginannoni, Gregory D. Bossart