Evaluating the behavior of gadolinium and other rare earth elements through large metropolitan sewage treatment plants
Philip L. Verplanck, Edward T. Furlong, James L. Gray, Patrick J. Phillips, Ruth E. Wolf, Kathleen Esposito
2010, Environmental Science & Technology (44) 3876-3882
A primary pathway for emerging contaminants (pharmaceuticals, personal care products, steroids, and hormones) to enter aquatic ecosystems is effluent from sewage treatment plants (STP), and identifying technologies to minimize the amount of these contaminants released is important. Quantifying the flux of these contaminants through STPs is difficult. This study evaluates...
Hazards affecting grizzly bear survival in the Greater Yellowstone Ecosystem
Charles C. Schwartz, Mark A. Haroldson, Gary C. White
2010, Journal of Wildlife Management (74) 654-667
During the past 2 decades, the grizzly bear (Ursus arctos) population in the Greater Yellowstone Ecosystem (GYE) has increased in numbers and expanded its range. Early efforts to model grizzly bear mortality were principally focused within the United States Fish and Wildlife Service Grizzly Bear Recovery Zone, which currently...
Agronomic and environmental implications of enhanced s-triazine degradation
L. Jason Krutz, Dale L. Shaner, Mark A. Weaver, Richard M. Webb, Robert M. Zablotowicz, Krishna N. Reddy, Yanbo Huang, Steven J. Thompson
2010, Pest Management Science (66) 461-481
Novel catabolic pathways enabling rapid detoxification of s-triazine herbicides have been elucidated and detected at a growing number of locations. The genes responsible for s-triazine mineralization, i.e. atzABCDEF and trzNDF, occur in at least four bacterial phyla and are implicated in the development of enhanced degradation in agricultural soils from all continents except Antarctica. Enhanced...
The binding nature of humic substances with arsenic in alluvial aquifers of Chianan Plain, southwestern Taiwan
Jiin-Shuh Jean, A. H. M. Selim Reza, Chia-Chuan Liu, Ming-Kuo Lee, Hua-Fen Hsu, Yao-Chang Lee, Thomas R. Kulp
Jochen Bundschuh, Prosun Bhattacharya, editor(s)
2010, Conference Paper, Arsenic in geosphere and human diseases: Proceedings of the third International Congress on Arsenic in the Environment
No abstract available....
Sediment-hosted lead-zinc deposits in Earth history
David L Leach, Dwight Bradley, David Huston, Sergei A. Pisarevsky, Ryan D. Taylor, S. Gardoll
2010, Economic Geology (105) 593-625
Sediment-hosted Pb-Zn deposits can be divided into two major subtypes. The first subtype is clastic-dominated lead-zinc (CD Pb-Zn) ores, which are hosted in shale, sandstone, siltstone, or mixed clastic rocks, or occur as carbonate replacement, within a CD sedimentary rock sequence. This subtype includes deposits that have been traditionally referred...
Evaluating remediation alternatives for mine drainage, Little Cottonwood Creek, Utah, USA
Briant A. Kimball, Robert L. Runkel
2010, Environmental Earth Sciences (60) 1021-1036
The vast occurrence of mine drainage worldwide, documented in descriptive studies, presents a staggering challenge for remediation. Any tool that can move beyond descriptive study and helps to evaluate options for remediation in a way that maximizes improvements to the water quality of streams and minimizes cost of remediation could...
Displaying seismic deaggregation: The importance of the various sources
Warwick D. Smith, Stephen Harmsen
2010, Seismological Research Letters (81) 488-497
Seismic hazard deaggregation has become a standard part of probabilistic seismic hazard assessment (PSHA). The first product of PSHA is calculation of the likely severity of ground motion at a given range of annual probability levels, and this is extremely important for seismic design...
Recent subsidence-rate reductions in the Mississippi Delta and their geological implications
Julie Bernier, Robert A. Morton
2010, Journal of Coastal Research (26) 555-561
The Mississippi Delta has long been characterized as an area of rapid subsidence; however, recent subsidence rates are substantially lower than previously reported. Tide-gauge records indicate that rates of relative sea-level rise were slow from 1947 until the mid-1960s, relatively fast from the mid-1960s until the early 1990s, and then...
Permeability of the continental crust: Dynamic variations inferred from seismicity and metamorphism
Steven E. Ingebritsen, C. E. Manning
2010, Geofluids (10) 193-205
The variation of permeability with depth can be probed indirectly by various means, including hydrologic models that use geothermal data as constraints and the progress of metamorphic reactions driven by fluid flow. Geothermal and metamorphic data combine to indicate that mean permeability (k) of tectonically active continental crust decreases with...
Secular variation in economic geology
Richard J. Goldfarb, Dwight Bradley, David L Leach
2010, Economic Geology (105) 459-465
The temporal pattern of ore deposits on a constantly evolving Earth reflects the complex interplay between the evolving global tectonic regime, episodic mantle plume events, overall changes in global heat flow, atmospheric and oceanic redox states, and even singular impact and glaciation events. Within...
Effect of diet on fecal and urinary estrogenic activity
H.A. Tucker, K.F. Knowlton, Michael T. Meyer, W.O Khunjar, N.G. Love
2010, Journal of Dairy Science (93) 2088-2094
The United States Environmental Protection Agency has identified estrogens from animal feeding operations as a major environmental concern, but few data are available to quantify the excretion of estrogenic compounds by dairy cattle. The objectives of this study were to quantify variation in estrogenic activity in feces and urine due to increased...
Modeling the production, decomposition, and transport of dissolved organic carbon in boreal soils
Zhaosheng Fan, Jason C. Neff, Kimberly P. Wickland
2010, Soil Science (175) 223-232
The movement of dissolved organic carbon (DOC) through boreal ecosystems has drawn increased attention because of its potential impact on the feedback of OC stocks to global environmental change in this region. Few models of boreal DOC exist. Here we present a one-dimensional model with simultaneous production, decomposition, sorption/desorption, and...
Fluvial processes and vegetation - Glimpses of the past, the present, and perhaps the future.
Waite R. Osterkamp, Cliff R. Hupp
2010, Geomorphology (116) 274-285
"Most research before 1960 into interactions among fluvial processes, resulting landforms, and vegetation was descriptive. Since then, however, research has become more detailed and quantitative permitting numerical modeling and applications including agricultural-erosion abatement and rehabilitation of altered bottomlands. Although progress was largely observational, the empiricism increasingly yielded to objective recognition of...
Unintended effects of electrofishing on nongame fishes
Leandro E. Miranda, R. H. Kidwell
2010, Transactions of the American Fisheries Society (139) 1315-1321
Most studies of injury associated with electrofishing have focused on game fishes, but few have given attention to cohabiting small nongame species. Under controlled laboratory conditions, we subjected small nongame cyprinids, ictalurids, and percids to a wide range of voltages and waveforms to examine potential harmful effects. Fish were treated...
Variability and trends in dry day frequency and dry event length in the southwestern United States
Gregory J. McCabe, David R. Legates, Harry F. Lins
2010, Journal of Geophysical Research D: Atmospheres (115)
Daily precipitation from 22 National Weather Service first-order weather stations in the southwestern United States for water years 1951 through 2006 are used to examine variability and trends in the frequency of dry days and dry event length. Dry events with minimum thresholds of 10 and 20 consecutive days of...
Revisions of rump fat and body scoring indices for deer, elk, and moose
Rachel C. Cook, John G. Cook, Thomas R. Stephenson, Woodrow L. Myers, Scott M. Mccorquodale, David J. Vales, Larry L. Irwin, P. Briggs Hall, Rocky D. Spencer, Shannon L. Murphie, Kathryn A. Schoenecker, Patrick J. Miller
2010, Journal of Wildlife Diseases (74) 880-896
Because they do not require sacrificing animals, body condition scores (BCS), thickness of rump fat (MAXFAT), and other similar predictors of body fat have advanced estimating nutritional condition of ungulates and their use has proliferated in North America in the last decade. However, initial testing of these predictors was too...
Global climate change and environmental contaminants: A SETAC call for research
2010, Integrated Environmental Assessment and Management (6) 197-198
No abstract available....
Comparative morphology among northern populations of breeding Cooper's Hawks
Robert N. Rosenfield, Laura J. Rosenfield, John Bielefeldt, Robert K. Murphy, Andrew C. Stewart, William E. Stout, Timothy G. Driscoll, Michael A. Bozek
2010, Condor (112) 347-355
Few studies at a broad geographical scale have characterized intraspecific variation in morphology of woodland hawks in the genus Accipiter. From 1999 to 2007 we investigated morphological variation in large samples of live Cooper's Hawks (A. cooperii) nesting in four study areas: coniferous woodland around Victoria, British Columbia, Canada, isolated deciduous...
Abdominally implanted transmitters with percutaneous antennas affect the dive performance of Common Eiders
Abby N. Powell, Christopher J. Latty, Tuula E. Hollmén, Margaret R. Petersen, Russel D. Andrews
2010, Condor (112) 314-322
Implanted transmitters have become an important tool for studying the ecology of sea ducks, but their effects remain largely undocumented. To address this, we assessed how abdominally implanted transmitters with percutaneous antennas affect the vertical dive speeds, stroke frequencies, bottom time, and dive duration of captive Common Eiders (Somateria mollissima)....
A comparison of algal, macroinvertebrate, and fish assemblage indices for assessing low-level nutrient enrichment in wadeable Ozark streams
B. G. Justus, James C. Petersen, Suzanne R. Femmer, Jerri V. Davis, J. E. Wallace
2010, Ecological Indicators (10) 627-638
Biotic indices for algae, macroinvertebrates, and fish assemblages can be effective for monitoring stream enrichment, but little is known regarding the value of the three assemblages for detecting perturbance as a consequence of low-level nutrient enrichment. In the summer of 2006, we collected nutrient and biotic samples from 30 wadeable...
Why Study Paleoclimate?
Marci Robinson, Harry Dowsett
2010, Fact Sheet 2010-3021
U.S. Geological Survey (USGS) researchers are at the forefront of paleoclimate research, the study of past climates. With their unique skills and perspective, only geologists have the tools necessary to delve into the distant past (long before instrumental records were collected) in order to better understand global environmental conditions that...
The Origins of C4 Grasslands: Integrating Evolutionary and Ecosystem Science
Erika J. Edwards, Colin P. Osborne, Caroline A. E. Stromberg, Stephen A. Smith, William J. Bond, Pascal-Antoine Christin, Asaph B. Cousins, Melvin R. Duvall, David L. Fox, Robert P. Freckleton, Oula Ghannoum, James Hartwell, Yongsong Huang, Christine M. Janis, Jon E. Keeley, Elizabeth A. Kellogg, Alan K. Knapp, Andrew D.B. Leakey, David Mcgovern Nelson, Jeffery M. Saarela, Rowan F. Sage, Osvaldo E. Sala, Nicolas Salamin, Christopher J. Still, Brett Tipple
2010, Science (328) 587-591
The evolution of the C4 photosynthetic pathway from the ancestral C3 pathway in grasses led to the establishment of grasslands in warm climates during the Late Miocene (8 to 3 million years ago). This was a major event in plant evolutionary history, and their high rates of foliage production sustained...
A macroinvertebrate assessment of Ozark streams located in lead-zinc mining areas of the Viburnum Trend in southeastern Missouri, USA
Barry C. Poulton, Ann L. Allert, John M. Besser, Christopher J. Schmitt, William G. Brumbaugh, James F. Fairchild
2010, Environmental Monitoring and Assessment (163) 619-641
The Viburnum Trend lead-zinc mining subdistrict is located in the southeast Missouri portion of the Ozark Plateau. In 2003 and 2004, we assessed the ecological effects of mining in several watersheds in the region. We included macroinvertebrate surveys, habitat assessments, and analysis of metals in sediment, pore water,...
The influence of partial timber harvesting in riparian buffers on macroinvertebrate and fish communities in small streams in Minnesota, USA
Christopher J. Chizinski, Bruce C. Vondracek, Charles R. Blinn, Raymond M. Newman, Dickson M. Atuke, Keith Fredricks, Nathaniel A. Hemstad, Eric Merten, Nicholas Schlesser
2010, Forest Ecology and Management (259) 1946-1958
Relatively few evaluations of aquatic macroinvertebrate and fish communities have been published in peer-reviewed literature detailing the effect of varying residual basal area (RBA) after timber harvesting in riparian buffers. Our analysis investigated the effects of partial harvesting within riparian buffers on aquatic macroinvertebrate and fish communities in small streams...
Supply of and demand for selected energy related mineral commodities
Scott F. Sibley
2010, Conference Paper, Critical elements for new energy technologies: an MIT Energy Initiative Workshop report
In this report, subjects discussed include components of mineral supply, production, and consumption data, and information on selected mineral commodities in which the Energy Critical Elements Study Group has an interest, and U.S. Geological Survey (USGS) recycling studies, with some results of these studies....
