Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10351
Microsatellite genetic diversity and differentiation of native and introduced grass carp populations in three continents Microsatellite genetic diversity and differentiation of native and introduced grass carp populations in three continents
Grass carp (Ctenopharyngodon idella), a freshwater species native to China, has been introduced to about 100 countries/regions and poses both biological and environmental challenges to the receiving ecosystems. In this study, we analyzed genetic variation in grass carp from three introduced river systems (Mississippi River Basin in US, Danube River in Hungary, and Tone River in Japan) as...
Authors
Duane Chapman, Q. Chen, Chenghui Wang, Jinlian Zhao, Guoqing Lu, Jeney Zsigmond, Si-Fa Li
Experimental determination of soil heat storage for the simulation of heat transport in a coastal wetland Experimental determination of soil heat storage for the simulation of heat transport in a coastal wetland
Two physical experiments were developed to better define the thermal interaction of wetland water and the underlying soil layer. This information is important to numerical models of flow and heat transport that have been developed to support biological studies in the South Florida coastal wetland areas. The experimental apparatus consists of two 1.32 m diameter by 0.99 m tall, trailer...
Authors
Michael Swain, Matthew Swain, Melinda Lohmann, Eric Swain
Initiation of long-term coupled microbiological, geochemical, and hydrological experimentation within the seafloor at North Pond, western flank of the Mid-Atlantic Ridge Initiation of long-term coupled microbiological, geochemical, and hydrological experimentation within the seafloor at North Pond, western flank of the Mid-Atlantic Ridge
Integrated Ocean Drilling Program (IODP) Expedition 336 successfully initiated subseafloor observatory science at a young mid-ocean-ridge flank setting. All of the drilled sites are located in the North Pond region of the Atlantic Ocean (22°45′N, 46°05′W) in 4414–4483 m water depth. This area is known from previous ocean drilling and site survey investigations as a site of particularly...
Authors
K.J. Edwards, N. Backert, W. Bach, K. Becker, A. Klaus, Dale W. Griffin, L. Anderson, A.G. Haddad, Y. Harigane, P.L. Campion, H. Hirayama, H.J. Mills, S.M. Hulme, K. Nakamura, S.L. Jorgensen, B. Orcutt, T.L. Insua, Y.-S. Park, V. Rennie, E.C. Salas, O. Rouxel, F. Wang, J.A. Russel, C.G. Wheat, K. Sakata, M. Brown, J.L. Magnusson, Z. Ettlinger
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
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
Many other plants grow in mangrove forests too! Many other plants grow in mangrove forests too!
No abstract available.
Authors
Thomas J. Smith
Outlier reefs are found off the Florida Keys Outlier reefs are found off the Florida Keys
No abstract available.
Authors
Barbara H. Lidz
Sirenian pathology and mortality assessment Sirenian pathology and mortality assessment
No abstract available.
Authors
Robert K. Bonde, Antonio A. Mignucci-Ginannoni, Gregory D. Bossart
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
Abiotic and biotic controls of cryptobenthic fish assemblages across a Caribbean seascape Abiotic and biotic controls of cryptobenthic fish assemblages across a Caribbean seascape
The majority of fish studies on coral reefs consider only non-cryptic species and, despite their functional importance, data on cryptic species are scarce. This study investigates inter-habitat variation in Caribbean cryptobenthic fishes by re-analysing a comprehensive data set from 58 rotenone stations around Buck Island, U.S. Virgin Islands. Boosted regression trees were used to...
Authors
A.R. Harborne, H.L. Jelks, W. F. Smith-Vaniz, L.A. Rocha
Pathogenic human viruses are present in residential canals Pathogenic human viruses are present in residential canals
No abstract available.
Authors
Dale W. Griffin
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