Quality of streams in Johnson County, Kansas, 2002--10
Teresa J. Rasmussen, Mandy S. Stone, Barry C. Poulton, Jennifer L. Graham
2012, Scientific Investigations Report 2012-5279
Stream quality in Johnson County, northeastern Kansas, was assessed on the basis of land use, hydrology, stream-water and streambed-sediment chemistry, riparian and in-stream habitat, and periphyton and macroinvertebrate community data collected from 22 sites during 2002 through 2010. Stream conditions at the end of the study period are evaluated and...
Glass wool filters for concentrating waterborne viruses and agricultural zoonotic pathogens
Hana T. Millen, Jordan C. Gonnering, Ryan K. Berg, Susan K. Spencer, William E. Jokela, John M. Pearce, Jackson S. Borchardt, Mark A. Borchardt
2012, Journal of Visualized Experiments (61)
The key first step in evaluating pathogen levels in suspected contaminated water is concentration. Concentration methods tend to be specific for a particular pathogen group, for example US Environmental Protection Agency Method 1623 for Giardia and Cryptosporidium1, which means multiple methods are required if the sampling program is targeting more...
Elemental mapping by Dawn reveals exogenic H in Vesta's regolith
Thomas H. Prettyman, David W. Mittlefehldt, Naoyuki Yamashita, David J. Lawrence, Andrew W. Beck, William C. Feldman, Timothy J. McCoy, Harry Y. McSween, Michael J. Toplis, Timothy N. Titus, Pasquale Tricarico, Robert C. Reedy, John S. Hendricks, Olivier Forni, Lucille Le Corre, Jian-Yang Li, Hugau Mizzon, Vishnu Reddy, Carol A. Raymond, Christopher T. Russell
2012, Science (338) 242-246
Using Dawn’s Gamma Ray and Neutron Detector, we tested models of Vesta’s evolution based on studies of howardite, eucrite, and diogenite (HED) meteorites. Global Fe/O and Fe/Si ratios are consistent with HED compositions. Neutron measurements confirm that a thick, diogenitic lower crust is exposed in the Rheasilvia basin, which is...
A meeting of the waters: interdisciplinary challenges and opportunities in tidal rivers
Scott H. Ensign, Gregory B. Noe, Cliff R. Hupp, Sergio Fagherazzi
2012, Eos, Transactions, American Geophysical Union (95) 455-456
At the interface of estuarine tides and freshwater rivers lie wetland and aquatic ecosystems, which experience dramatic effects of sea level rise. There, nontidal channels and riparian floodplains are transforming into tidal ecosystems, and tidal freshwater ecosystems are receiving increasing salinity. These river-floodplain systems have both fluvial characteristics, including meandering...
A perspective on modern pesticides, pelagic fish declines, and unknown ecological resilience in highly managed ecosystems
Nathaniel L. Scholz, Erica Fleishman, Larry Brown, Inge Werner, Michael L. Johnson, Marjorie L. Brooks, Carys L. Mitchelmore, Daniel Schlenk
2012, BioScience (62) 428-434
Pesticides applied on land are commonly transported by runoff or spray drift to aquatic ecosystems, where they are potentially toxic to fishes and other nontarget organisms. Pesticides add to and interact with other stressors of ecosystem processes, including surface-water diversions, losses of spawning and rearing habitats, nonnative species, and harmful...
Wintering waterfowl respond to Wetlands Reserve Program lands in the Central Valley of California
Jeffrey J. Buler, Wylie C. Barrow Jr., Lori A. Randall
2012, Report
Daytime use by wintering waterfowl at Wetlands Reserve Program (WRP) sites within the northern Central Valley of California (CVC) increased dramatically after wetland restoration and was sustained for up to 8 years post-restoration. The magnitude of the increase in waterfowl density at WRP sites after wetland restoration was greater with...
Helicopter electromagnetic data map ice thickness at Mount Adams and Mount Baker, Washington, USA
Carol A. Finn, Maria Deszcz-Pan, Paul A. Bedrosian
2012, Journal of Glaciology (58) 1133-1143
Ice-thickness measurements critical for flood and mudflow hazard studies are very sparse on Cascade Range (North America) volcanoes. Helicopter electromagnetic (HEM) data collected to detect hydrothermal alteration are used to determine ice thickness over portions of Mount Baker and Mount Adams volcanoes. A laterally continuous inversion method provides good estimates...
Impacts of climate change on ecosystem services
Peter Kareiva, Mary Ruckleshaus, Katie K. Arkema, Gary Geller, Evan Girvetz, Dave Goodrich, Erik Nelson, Virginia Matzek, Malin Pinsky, Walt Reid, Martin Saunders, Darius J. Semmens, Heather Tallis
2012, Book chapter, Impacts of climate change on biodiversity, ecosystems, and ecosystem services: technical input to the 2013 National Climate Assessment
Key Findings By 2050, climate change will triple the fraction of counties in the U.S. that are at high or extremely high risk of outstripping their water supplies (from 10 percent to 32 percent). The most at risk areas in the U.S. are the West, Southwest and Great Plains regions....
Bedrock basins in the Sierra Nevada, Alta California
James G. Moore, Mary A. Gorden, Thomas W. Sisson
2012, California Archaeology (4) 99-122
A 360-km-long belt of more than 1,400 meter-sized granitic bedrock basins occurs at 1,200 to 2,500 m elevation on the west flank of the Sierra Nevada. The circular, smooth basins are 0.7 to 1.7 min diameter and are commonly 50 to 1,000 liters in volume. They are man-made as shown by their restricted...
Using computational modeling of river flow with remotely sensed data to infer channel bathymetry
Jonathan M. Nelson, Richard R. McDonald, Paul J. Kinzel, Y. Shimizu
2012, Conference Paper, IAHR Riverflow 2012 Conference Proceedings
As part of an ongoing investigation into the use of computational river flow and morphodynamic models for the purpose of correcting and extending remotely sensed river datasets, a simple method for inferring channel bathymetry is developed and discussed. The method is based on an inversion of the equations expressing conservation...
Mineralogy and environmental geochemistry of historical iron slag, Hopewell Furnace National Historic Site, Pennsylvania, USA
Nadine M. Piatak, Robert R. Seal
2012, Applied Geochemistry (27) 623-643
The Hopewell Furnace National Historic Site in southeastern Pennsylvania, which features an Fe smelter that was operational in the 18th and 19th centuries, is dominated by three slag piles. Pile 1 slag, from the Hopewell Furnace, and pile 2 slag, likely from the nearby Cornwall Furnace, were both produced...
Analysis of host genetic diversity and viral entry as sources of between-host variation in viral load
Andrew R. Wargo, Alison M. Kell, Robert J. Scott, Gary H. Thorgaard, Gael Kurath
2012, Virus Research (165) 71-80
Little is known about the factors that drive the high levels of between-host variation in pathogen burden that are frequently observed in viral infections. Here, two factors thought to impact viral load variability, host genetic diversity and stochastic processes linked with viral entry into the host, were examined. This work...
Establishment of sentinel sampling sites to monitor changes in water and sediment quality and biota related to visitor use at Lake Powell, Arizona and Utah, 2004-2006
Robert J. Hart, Howard E. Taylor, G.M. Anderson
2012, Open-File Report 2012-1237
Twenty sentinel sampling sites were established and sampled during 2004–06 at Lake Powell, Arizona and Utah, by the U.S. Geological Survey and the National Park Service—Glen Canyon National Recreation Area. The sentinel sampling sites provide sampling locations on Lake Powell, the Nation’s second largest reservoir that can be visited and...
Repeat surveys of spawning cisco (Coregonus artedi) in western Lake Superior: Timing, distribution and composition of spawning stocks
Daniel L. Yule, Donald R. Schreiner, Peter A. Addison, Michael J. Seider, Lori M. Evrard, Steven A. Geving, Henry R. Quinlan
2012, Advances in Limnology (63) 65-87
Acoustic (AC) and midwater trawl (MT) surveys of spawning cisco (Coregonus artedi) in Lake Superior have been combined with commercial yield to estimate exploitation. To time surveys properly, it is important to understand when adults typically arrive at spawning grounds and how numbers change as the spawning season progresses. We...
Loss and modification of habitat
Francis Lemckert, Stephen Hecnar, David S. Pilliod
2012, Book chapter, Conservation and decline of amphibians: Ecological aspects, effect of humans, and management
Amphibians live in a wide variety of habitats around the world, many of which have been modified or destroyed by human activities. Most species have unique life history characteristics adapted to specific climates, habitats (e.g., lentic, lotic, terrestrial, arboreal, fossorial, amphibious), and local conditions that provide suitable areas for reproduction,...
Productivity and sedimentary δ15N variability for the last 17,000 years along the northern Gulf of Alaska continental slope
Jason A. Addison, Bruce P. Finney, Walter E. Dean, Maureen H. Davies, Alan C. Mix, John M. Jaeger
2012, Paleoceanography (27)
Biogenic opal, organic carbon, organic matter stable isotope, and trace metal data from a well-dated, high-resolution jumbo piston core (EW0408–85JC; 59° 33.3′N, 144° 9.21′W, 682 m water depth) recovered from the northern Gulf of Alaska continental slope reveal changes in productivity and nutrient utilization over the last 17,000 years. Maximum...
Genetic variation reveals influence of landscape connectivity on population dynamics and resiliency of western trout in disturbance-prone habitats
Helen M. Neville, Robert E. Gresswell, Jason B. Dunham
2012, Technical Report RMRS-GTR-290
Salmonid fishes have evolved and persisted in dynamic ecosystems where disturbance events vary in frequency, magnitude, timing, and duration, as well as the specific nature of associated effects (e.g., changes in thermal or flow regimes, geomorphology, or water chemistry). In the western United States, one of the major drivers of...
Thermal infrared remote sensing of water temperature in riverine landscapes
R. N Handcock, Christian E. Torgersen, K. A Cherkauer, A. R Gillespie, K Tockner, R. N. Faux, Jing Tan
Patrice E. Carbonneau, Hervé Piégay, editor(s)
2012, Book chapter, Fluvial remote sensing for science and management
Water temperature in riverine landscapes is an important regional indicator of water quality that is influenced by both ground- and surface-water inputs, and indirectly by land use in the surrounding watershed (Brown and Krygier, 1970; Beschta et al., 1987; Chen et al., 1998; Poole and Berman, 2001). Coldwater fishes such...
Mysis diluviana and Hemimysis anomala: reviewing the roles of a native and invasive mysid in the Laurentian Great Lakes region
Maureen G. Walsh, Brent T. Boscarino, Jerome Marty, Ora E. Johannsson
2012, Journal of Great Lakes Research (38) 1-6
Mysis diluviana and Hemimysis anomala are the only two species of mysid shrimps in the order Mysidacea that are present in the Laurentian Great Lakes of North America. M. diluviana has inhabited the deep, cold waters of this region since Pleistocene-era glacial retreat and is widely considered to have a...
Arsenic-induced biochemical and genotoxic effects and distribution in tissues of Sprague-Dawley rats
Anita K. Patlolla, Todor I. Todorov, Paul B. Tchounwou, Gijsbert van der Voet, Jose A. Centeno
2012, Microchemical Journal (105) 101-107
Arsenic (As) is a well documented human carcinogen. However, its mechanisms of toxic action and carcinogenic potential in animals have not been conclusive. In this research, we investigated the biochemical and genotoxic effects of As and studied its distribution in selected tissues of Sprague–Dawley rats. Four groups of six male...
Stochastic analyses to identify wellfield withdrawal effects on surface-water and groundwater in Miami-Dade County, Florida
Eric Swain
2012, Journal of Environmental Management (113) 15-21
Several stochastic analyses were conducted in Miami-Dade County, Florida, to evaluate the effects of wellfield withdrawal on aquifer water levels, canal stage, and canal flow. Multiyear data for withdrawals at four water-supply wellfields, water levels at the S-121 canal control structure and groundwater head at a nearby monitoring well were used to determine...
Borehole geophysical, fluid, and hydraulic properties within and surrounding the freshwater/saline-water transition zone, San Antonio segment of the Edwards aquifer, south-central Texas, 2010-11
Jonathan V. Thomas, Gregory P. Stanton, Rebecca B. Lambert
2012, Scientific Investigations Report 2012-5285
The freshwater zone of the San Antonio segment of the Edwards aquifer is used by residents of San Antonio and numerous other rapidly growing communities in south-central Texas as their primary water supply source. This freshwater zone is bounded to the south and southeast by a saline-water zone with an...
Assessing potential effects of changes in water use with a numerical groundwater-flow model of Carson Valley, Douglas County, Nevada, and Alpine County, California
Richard M. Yager, Douglas K. Maurer, C.J. Mayers
2012, Scientific Investigations Report 2012-5262
Rapid growth and development within Carson Valley in Douglas County, Nevada, and Alpine County, California, has caused concern over the continued availability of groundwater, and whether the increased municipal demand could either impact the availability of water or result in decreased flow in the Carson River. Annual pumpage of groundwater...
Seasonal zooplankton dynamics in Lake Michigan: disentangling impacts of resource limitation, ecosystem engineering, and predation during a critical ecosystem transition
Henry A. Vanderploeg, Steven A. Pothoven, Gary L. Fahnenstiel, Joann F. Cavaletto, James R. Liebig, Craig Stow Stow, Thomas F. Nalepa, Charles P. Madenjian, David B. Bunnell
2012, Journal of Great Lakes Research (38) 336-352
We examined seasonal dynamics of zooplankton at an offshore station in Lake Michigan from 1994 to 2003 and 2007 to 2008. This period saw variable weather, declines in planktivorous fish abundance, the introduction and expansion of dreissenid mussels, and a slow decline in total phosphorus concentrations. After the major expansion...
Floods of June 2012 in northeastern Minnesota
Christiana R. Czuba, James D. Fallon, Erich W. Kessler
2012, Scientific Investigations Report 2012-5283
During June 19–20, 2012, heavy rainfall, as much as 10 inches locally reported, caused severe flooding across northeastern Minnesota. The floods were exacerbated by wet antecedent conditions from a relatively rainy spring, with May 2012 as one of the wettest Mays on record in Duluth. The June 19–20, 2012, rainfall...
