Epizootic ulcerative syndrome caused by Aphanomyces invadans in captive bullseye snakehead Channa marulius collected from south Florida, USA
Ryan K. Saylor, Debra L. Miller, Mark W. Vandersea, Mark S. Bevelhimer, Pamela J. Schofield, Wayne A. Bennett
2010, Diseases of Aquatic Organisms (88) 169-175
Epizootic ulcerative syndrome (EUS) caused by the oomycete Aphanomyces invadans is an invasive, opportunistic disease of both freshwater and estuarine fishes. Originally documented as the cause of mycotic granulomatosis of ornamental fishes in Japan and as the cause of EUS of fishes in southeast Asia and Australia, this pathogen is also present...
Enumeration of viruses and prokaryotes in deep-sea sediments and cold seeps of the Gulf of Mexico
Christina A. Kellogg
2010, Deep-Sea Research Part II: Topical Studies in Oceanography (57) 2002-2007
Little is known about the distribution and abundance of viruses in deep-sea cold-seep environments. Like hydrothermal vents, seeps support communities of macrofauna that are sustained by chemosynthetic bacteria. Sediments close to these communities are hypothesized to be more microbiologically active and therefore to host higher numbers of viruses than non-seep...
Episodic swell growth inferred from variable uplift of the Cape Verde hotspot islands
R. Ramalho, G. Helffrich, M. Cosca, D. Vance, D. Hoffmann, D.N. Schmidt
2010, Nature Geoscience (3) 774-777
On the Beagle voyage, Charles Darwin first noted the creation and subsidence of ocean islands1, establishing in geology’s infancy that island freeboard changes with time. Hotspot ocean...
Emergency use of groundwater as a backup supply: Quantifying hydraulic impacts and economic benefits
Eric G. Reichard, Zhen Li, Caroline Hermans
2010, Water Resources Research (46)
Groundwater can play an important role in water‐supply emergency planning. A framework is presented for assessing the hydraulic impacts and associated costs of using groundwater as a backup supply when imported‐water deliveries are disrupted, and for quantifying the emergency benefits of groundwater management strategies that enable better response to such...
Rejoinder: Sifting through model space
Dennis M. Heisey, Erik E. Osnas, Paul C. Cross, Damien O. Joly, Julia A. Langenberg, Michael W. Miller
2010, Ecology (91) 3503-3514
Observational data sets generated by complex processes are common in ecology. Traditionally these have been very challenging to analyze because of the limitations of available statistical tools. This seems to be changing, and these are exciting times to be involved with ecological statistics, not just because of the neo-Bayesian revival...
Relating the ability of mallards to ingest high levels of sediment to potential contaminant exposure in waterfowl
Gary Heinz, W. Nelson Beyer, David J. Hoffman, Daniel J. Audet
2010, Environmental Toxicology and Chemistry (29) 1621-1624
When waterfowl feed from the bottom of bodies of water, they sometimes ingest sediments along with their food, and this sediment can be a major source of contaminants. Learning how much sediment waterfowl can consume in their diet and still maintain their health would be helpful in assessing potential threats...
Reconnaissance dating: a new radiocarbon method applied to assessing the temporal distribution of Southern Ocean deep-sea corals
Andrea Burke, Laura F. Robinson, Ann P. McNichol, William J. Jenkins, Kathryn M. Scanlon, Dana S. Gerlach
2010, Deep-Sea Research Part I: Oceanographic Research Papers (57) 1510-1520
We have developed a rapid 'reconnaissance' method of preparing graphite for 14C/12C analysis. Carbonate (~15 mg) is combusted using an elemental analyzer and the resulting CO2 is converted to graphite using a sealed tube zinc reduction method. Over 85% (n=45 replicates on twenty-one individual corals) of reconnaissance ages measured on...
Recent ecological divergence despite migration in sockeye salmon (Oncorhynchus nerka)
Scott A. Pavey, Jennifer L. Nielsen, Troy R. Hamon
2010, Evolution (64) 1773-1783
Ecological divergence may result when populations experience different selection regimes, but there is considerable discussion about the role of migration at the beginning stages of divergence before reproductive isolating mechanisms have evolved. However, detection of past migration is difficult in current populations and tools to differentiate genetic similarities due to...
Reclaiming freshwater sustainability in the Cadillac Desert
John L. Sabo, Tushar Sinha, Laura C. Bowling, Gerrit H.W. Schoups, Wesley W. Wallender, Michael E. Campana, Keith A. Cherkauer, Pam L. Fuller, William L. Graf, Jan W. Hopmans, John S. Kominoski, Carissa Taylor, Stanley W. Trimble, Robert H. Webb, Ellen E. Wohl
2010, Proceedings of the National Academy of Sciences of the United States of America (107) 21263-21269
Increasing human appropriation of freshwater resources presents a tangible limit to the sustainability of cities, agriculture, and ecosystems in the western United States. Marc Reisner tackles this theme in his 1986 classic Cadillac Desert: The American West and Its Disappearing Water. Reisner's analysis paints a portrait of region-wide hydrologic dysfunction...
Total mercury, methylmercury, and selected elements in soils of the Fishing Brook watershed, Hamilton County, New York, and the McTier Creek watershed, Aiken County, South Carolina, 2008
Laurel G. Woodruff, William F. Cannon, Christopher D. Knightes, Francis H. Chapelle, Paul M. Bradley, Douglas A. Burns, Mark E. Brigham, Mark A. Lowery
2010, Data Series 516
Mercury is an element of on-going concern for human and aquatic health. Mercury sequestered in upland and wetland soils represents a source that may contribute to mercury contamination in sensitive ecosystems. An improved understanding of mercury cycling in stream ecosystems requires identification and quantification of mercury speciation and transport dynamics...
Archive of digital Chirp sub-bottom profile data collected during USGS Cruise 07SCC01 offshore of the Chandeleur Islands, Louisiana, June 2007
Arnell S. Forde, Shawn V. Dadisman, James G. Flocks, Dana S. Wiese
2010, Data Series 553
In June of 2007, the U.S. Geological Survey (USGS) conducted a geophysical survey offshore of the Chandeleur Islands, Louisiana, in cooperation with the Louisiana Department of Natural Resources (LDNR) as part of the USGS Barrier Island Comprehensive Monitoring (BICM) project. This project is part of a broader study focused on...
Coral calcification in a changing ocean
Ilsa B. Kuffner
2010, Fact Sheet 2010-3098
Animals and plants that live in the ocean form skeletons and other hard parts by combining calcium ions and carbonate ions to create calcium carbonate. This process is called calcification. In tropical and subtropical oceans, the calcification of corals and other organisms creates reefs that protect islands, produce beautiful white-sand...
Detailed seafloor habitat mapping to enhance marine-resource management
David G. Zawada, Kristen M. Hart
2010, Fact Sheet 2010-3090
Pictures of the seafloor capture important information about the sediments, exposed geologic features, submerged aquatic vegetation, and animals found in a given habitat. With the emergence of marine protected areas (MPAs) as a favored tactic for preserving coral reef resources, knowledge of essential habitat components is paramount to designing effective...
Archive of side scan sonar and swath bathymetry data collected during USGS cruise 10CCT01 offshore of Cat Island, Gulf Islands National Seashore, Mississippi, March 2010
Nancy T. DeWitt, James G. Flocks, William R. Pfeiffer, Dana S. Wiese
2010, Data Series 563
In March of 2010, the U.S. Geological Survey (USGS) conducted geophysical surveys east of Cat Island, Mississippi (fig. 1). The efforts were part of the USGS Gulf of Mexico Science Coordination partnership with the U.S. Army Corps of Engineers (USACE) to assist the Mississippi Coastal Improvements Program (MsCIP) and the...
Outdoor water use and water conservation opportunities in Virginia Beach, Virginia
John R. Eggleston
2010, Fact Sheet 2010-3007
How much water do you use to water your lawn, wash your car, or fill your swimming pool? Your answers to these questions have important implications for water supplies in the City of Virginia Beach. To help find the answers, the City cooperated with the U.S. Geological Survey (USGS) and...
Extreme drought to extreme floods: summary of hydrologic conditions in Georgia, 2009
Andrew E. Knaak, Timothy K. Pojunas, Michael F. Peck
2010, Fact Sheet 2010-3101
The United States Geological Survey (USGS) Georgia Water Science Center (WSC) maintains a long-term hydrologic monitoring network of more than 317 real-time streamgages, more than 180 groundwater wells of which 31 are real-time, and 10 lake-level monitoring stations. One of the many benefits of data collected from this monitoring network...
Reduced channel conveyance on the Wichita River at Wichita Falls, Texas, 1900-2009
Karl Winters, Stanley Baldys, Russell Schreiber
2010, Journal of Environmental Hydrology (18) Paper 8
Recent floods on the Wichita River at Wichita Falls, Texas, have reached higher stages compared to historical floods of similar magnitude discharges. The U.S. Geological Survey (USGS) has operated streamflow-gaging station 07312500 Wichita River at Wichita Falls, Tex., since 1938 and flood measurements near the location of the present gage...
Projected climate impacts for the amphibians of the western hemisphere
Joshua J. Lawler, Sarah L. Shafer, Betsy A. Bancroft, Andrew R. Blaustein
2010, Conservation Biology (24) 38-50
Given their physiological requirements, limited dispersal abilities, and hydrologically sensitive habitats, amphibians are likely to be highly sensitive to future climatic changes. We used three approaches to map areas in the western hemisphere where amphibians are particularly likely to be affected by climate change. First, we used bioclimatic models to...
Quantifying large-scale historical formation of accommodation in the Mississippi Delta
Robert A. Morton, Julie Bernier, Kyle W. Kelso, John A. Barras
2010, Earth Surface Processes and Landforms (35) 1625-1641
Large volumes of new accommodation have formed within the Mississippi Delta plain since the mid-1950s in association with rapid conversion of coastal wetlands to open water. The three-dimensional aspects and processes responsible for accommodation formation were quantified by comparing surface elevations, water depths, and vertical displacements of stratigraphic contacts that...
Pseudasthenes, a new genus of ovenbird (Aves: Passeriformes: Furnariidae)
Elizabeth Derryberry, Santiago Claramunt, Kelly E. O’Quin, Alexandre Aleixo, R. Terry Chesser, J.V. Remsen Jr., Robb T. Brumfield
2010, Zootaxa (2416) 61-68
Phylogenetic analysis of the family Furnariidae (Aves: Passeriformes) indicates that the genus Asthenes is polyphyletic, consisting of two groups that are not sister taxa. Pseudasthenes, a new genus of ovenbird, is described for one of these groups. The four species included in the new genus, formerly placed in Asthenes, are...
Evaluation of geodetic and geologic datasets in the Northern Walker Lane-Summary and recommendations of the Workshop
Richard W. Briggs, William C. Hammond
2010, Open-File Report 2011-1282
The Northern Walker Lane comprises a complex network of active faults in northwestern Nevada and northeastern California bound on the west by the Sierra Nevada and on the east by the extensional Basin and Range Province. Because deformation is distributed across sets of discontinuous faults, it is particularly challenging to...
Predictors of occurrence of the aquatic macrophyte Podostemum ceratophyllum in a southern Appalachian River
Jane E. Argentina, Mary Freeman, Byron J. Freeman
2010, Southeastern Naturalist (9) 465-476
The aquatic macrophyte Podostemum ceratophyllum (Hornleaf Riverweed) commonly provides habitat for invertebrates and fishes in flowing-water portions of Piedmont and Appalachian streams in the eastern US. We quantified variation in percent cover by P. ceratophyllum in a 39-km reach of the Conasauga River, TN and GA, to test the hypothesis...
Prairie wetland complexes as landscape functional units in a changing climate
W. Carter Johnson, Brett Werner, Glenn R. Guntenspergen, Richard A. Voldseth, Bruce Millett, David E. Naugle, Mirela Tulbure, Rosemary W.H. Carroll, John Tracy, Craig Olawsky
2010, BioScience (60) 128-140
The wetland complex is the functional ecological unit of the prairie pothole region (PPR) of central North America. Diverse complexes of wetlands contribute high spatial and temporal environmental heterogeneity, productivity, and biodiversity to these glaciated prairie landscapes. Climatewarming simulations using the new model WETLANDSCAPE (WLS) project major reductions in water...
Simultaneous modeling of habitat suitability, occupancy, and relative abundance: African elephants in Zimbabwe
Julien Martin, Simon Chamaille-Jammes, James D. Nichols, Herve Fritz, James E. Hines, Christopher J. Fonnesbeck, Darryl I. MacKenzie, Larissa L. Bailey
2010, Ecological Applications (20) 1173-1182
The recent development of statistical models such as dynamic site occupancy models provides the opportunity to address fairly complex management and conservation problems with relatively simple models. However, surprisingly few empirical studies have simultaneously modeled habitat suitability and occupancy status of organisms over large landscapes for management purposes. Joint modeling...
Population viability of Arctic grayling in the Gibbon River, Yellowstone National Park
Amber C. Steed, Alexander V. Zale, Todd M. Koel, Steven T. Kalinowski
2010, North American Journal of Fisheries Management (30) 1582-1590
The fluvial Arctic grayling Thymallus arcticus is restricted to less than 5% of its native range in the contiguous United States and was relisted as a category 3 candidate species under the U.S. Endangered Species Act in 2010. Although fluvial Arctic grayling of the lower Gibbon River, Yellowstone National Park,...
