Intra-seasonal variation in foraging behavior among Adélie penguins (Pygocelis adeliae) breeding at Cape Hallett, Ross Sea, Antarctica
P. O. B. Lyver, C. J. MacLeod, G. Ballard, B. J. Karl, K. J. Barton, J. Adams, D. G. Ainley, P. R. Wilson
2011, Polar Biology (34) 49-67
We investigated intra-seasonal variation in foraging behavior of chick-rearing Adélie penguins, Pygoscelis adeliae, during two consecutive summers at Cape Hallett, northwestern Ross Sea. Although foraging behavior of this species has been extensively studied throughout the broad continental shelf region of the Ross Sea, this is the first study to report...
Interhemispheric ice-sheet synchronicity during the last glacial maximum
Michael E. Weber, Peter U. Clark, Werner Ricken, Jerry X. Mitrovica, Steven W. Hostetler, Gerhard Kuhn
2011, Science (334) 1265-1269
The timing of the last maximum extent of the Antarctic ice sheets relative to those in the Northern Hemisphere remains poorly understood. We develop a chronology for the Weddell Sea sector of the East Antarctic Ice Sheet that, combined with ages from other Antarctic ice-sheet sectors, indicates that the advance...
Interlaboratory comparison of measurements of acid-volatile sulfide and simultaneously extracted nickel in spiked sediments
William G. Brumbaugh, Chad R. Hammerschmidt, Luciana Zanella, Emily Rogevich, Gregory Salata, Radoslaw Puchalka
2011, Environmental Toxicology and Chemistry (30) 1306-1309
An interlaboratory comparison of acid-volatile sulfide (AVS) and simultaneously extracted nickel (SEM_Ni) measurements of sediments was conducted among five independent laboratories. Relative standard deviations for the seven test samples ranged from 5.6 to 71% (mean = 25%) for AVS and from 5.5 to 15% (mean = 10%) for SEM_Ni. These results are in stark...
Integration of paleoseismic data from multiple sites to develop an objective earthquake chronology: Application to the Weber segment of the Wasatch fault zone, Utah
Christopher B. DuRoss, Stephen F. Personius, Anthony J. Crone, Susan S. Olig, William R. Lund
2011, Bulletin of the Seismological Society of America (101) 2765-2781
We present a method to evaluate and integrate paleoseismic data from multiple sites into a single, objective measure of earthquake timing and recurrence on discrete segments of active faults. We apply this method to the Weber segment (WS) of the Wasatch fault zone using data from four fault-trench studies completed...
Streamflow of 2010--Water year summary
Jian Xiaodong, David M. Wolock, Harry F. Lins, Steve Brady
2011, Fact Sheet 2011-3043
The maps and graph in this summary describe streamflow conditions for water-year 2010 (October 1, 2009 to September 30, 2010) in the context of the 81-year period 1930-2010, unless otherwise noted. The illustrations are based on observed data from the U.S. Geological Survey's (USGS) National Streamflow Information Program. The period...
Innate immunity is not related to the sex of adult Tree Swallows during the nestling period
Bradley J. Houdek, Michael P. Lombardo, Patrick A. Thorpe, D. Caldwell Hahn
2011, The Condor (113) 853-859
Evolutionary theory predicts that exposure to more diverse pathogens will result in the evolution of a more robust immune response. We predicted that during the breeding season the innate immune function of female Tree Swallows (Tachycineta bicolor) should be more effective than that of males because (1) the transmission of...
Influence of throat configuration and fish density on escapement of channel catfish from hoop nets
Mark T. Porath, Larry D. Pape, Lindsey K. Richters
2011, American Fisheries Society Symposium (77) 563-571
In recent years, several state agencies have adopted the use of baited, tandemset hoop nets to assess lentic channel catfish Ictalurus punctatus populations. Some level of escapement from the net is expected because an opening exists in each throat of the net, although factors influencing rates of escapement from hoop...
Influence of dissolved organic carbon on toxicity of copper to a unionid mussel (Villosa iris) and a cladoceran (Ceriodaphnia dubia) in acute and chronic water exposures
Ning Wang, Christopher A. Mebane, James L. Kunz, Christopher G. Ingersoll, William G. Brumbaugh, Robert C. Santore, Joseph W. Gorsuch, W. Ray Arnold
2011, Environmental Toxicology and Chemistry (30) 2115-2125
Acute and chronic toxicity of copper (Cu) to a unionid mussel (Villosa iris) and a cladoceran (Ceriodaphnia dubia) were determined in water exposures at four concentrations of dissolved organic carbon (DOC; nominally 0.5, 2.5, 5, and 10 mg/L as carbon [C]). Test waters with DOC concentrations of 2.5 to 10...
Influence of body condition on influenza A virus infection in mallard ducks: Experimental infection data
Dustin M. Arsnoe, S. Ip, Jennifer C. Owen
2011, PLoS ONE (6)
Migrating waterfowl are implicated in the global spread of influenza A viruses (IAVs), and mallards (Anas platyrhynchos) are considered a particularly important IAV reservoir. Prevalence of IAV infection in waterfowl peaks during autumn pre-migration staging and then declines as birds reach wintering areas. Migration is energetically costly and birds often...
Indicators and protocols for monitoring impacts of formal and informal trails in protected areas
Jeffrey L. Marion, Yu-Fai Leung
2011, Journal of Tourism and Leisure Studies (17) 215-236
Trails are a common recreation infrastructure in protected areas and their conditions affect the quality of natural resources and visitor experiences. Various trail impact indicators and assessment protocols have been developed in support of monitoring programs, which are often used for management decision-making or as part of visitor capacity management...
Impacts of climate change on the growing season in the United States
Steven L. Markstrom, Lauren E. Hay
2011, Earth Interactions (15) 1-17
Understanding the effects of climate change on the vegetative growing season is key to quantifying future hydrologic water budget conditions. The U.S. Geological Survey modeled changes in future growing season length at 14 basins across 11 states. Simulations for each basin were generated using five general circulation models with three...
Habitat use and movement of the endangered Arroyo Toad (Anaxyrus californicus) in coastal southern California
Elizabeth Gallegos, Lisa M. Lyren, Robert E. Lovich, Milan J. Mitrovich, Robert N. Fisher
2011, Journal of Herpetology (45) 319-328
Information on the habitat use and movement patterns of Arroyo Toads (Anaxyrus californicus) is limited. The temporal and spatial characteristics of terrestrial habitat use, especially as it relates to upland use in coastal areas of the species' range, are poorly understood. We present analyses of radiotelemetry data from 40 individual...
Formation of nanocolloidal metacinnabar in mercury-DOM-sulfide systems
Chase A. Gerbig, Christopher S. Kim, John P. Stegemeier, Joseph N. Ryan, George R. Aiken
2011, Environmental Science & Technology (45) 9180-9187
Direct determination of mercury (Hg) speciation in sulfide-containing environments is confounded by low mercury concentrations and poor analytical sensitivity. Here we report the results of experiments designed to assess mercury speciation at environmentally relevant ratios of mercury to dissolved organic matter (DOM) (i.e., <4 nmol Hg (mg DOM)−1) by combining...
Exhumation history of the NW Indian Himalaya revealed by fission track and 40Ar/39Ar ages
Micha Schlup, Albrecht Steck, Andrew Carter, Michael Cosca, Jean-Luc Epard, Johannes Hunziker
2011, Journal of Asian Earth Sciences (40) 334-350
New fission track and Ar/Ar geochronological data provide time constraints on the exhumation history of the Himalayan nappes in the Mandi (Beas valley) — Tso Morari transect of the NW Indian Himalaya. Results from this and previous studies suggest that the SW-directed North Himalayan nappes were emplaced by detachment from...
Evaluating the potential for stock size to limit recruitment in largemouth bass
Michael S. Allen, Mark W. Rogers, Mathew J. Catalano, Daniel G. Gwinn, Stephen J. Walsh
2011, Transactions of the American Fisheries Society (140) 1093-1100
Compensatory changes in juvenile survival allow fish stocks to maintain relatively constant recruitment across a wide range of stock sizes (and levels of fishing), but few studies have experimentally explored recruitment compensation in fish populations. We evaluated the potential for recruitment compensation in largemouth bass Micropterus salmoides by stocking six...
Evaluation of the horizontal-to-vertical spectral ratio (HVSR) seismic method to determine sediment thickness in the vicinity of the South Well Field, Franklin County, OH
Ralph J. Haefner, Rodney A. Sheets, Robert E. Andrews
2011, Ohio Journal of Science (110) 77-85
The horizontal-to-vertical spectral ratio (HVSR) seismic method involves analyzing measurements of ambient seismic noise in three dimensions to determine the fundamental site resonance frequency. Resonance is excited by the interaction of surface waves (Rayleigh and Love) and body waves (vertically incident shear) with the high-contrast aconstic impedance boundary at the...
Concentrations and loads of nutrients in the tributaries of the Lake Okeechobee watershed, south-central Florida, water years 2004-2008
Michael J. Byrne, Molly S. Wood
2011, Data Series 613
Lake Okeechobee in south-central Florida is the second largest freshwater lake in the contiguous United States. Excessive phosphorus loading, harmful high and low water levels, and rapid expansion of non-native vegetation have threatened the health of the lake in recent decades. A study was conducted to monitor discharge and nutrient...
Estimating water supply arsenic levels in the New England bladder cancer study
John R. Nuckols, Laura E. Beane Freeman, Jay H. Lubin, Matthew S. Airola, Dalsu Baris, Joseph D. Ayotte, Anne Taylor, Chris Paulu, Margaret R. Karagas, Joanne Colt, Mary H. Ward, An-Tsun Huang, William Bress, Sai Cherala, Debra T. Silverman, Kenneth P. Cantor
2011, Environmental Health Perspectives (119) 1279-1285
Background: Ingestion of inorganic arsenic in drinking water is recognized as a cause of bladder cancer when levels are relatively high (≥ 150 μg/L). The epidemiologic evidence is less clear at the low-to-moderate concentrations typically observed in the United States. Accurate retrospective exposure assessment over a long time period is...
Understanding interaction effects of climate change and fire management on bird distributions through combined process and habitat models
Joseph D. White, Kevin J. Gutzwiller, Wylie C. Barrow, Lori Johnson-Randall, Lisa Zygo, Pamela Swint
2011, Conservation Biology (25) 536-546
Avian conservation efforts must account for changes in vegetation composition and structure associated with climate change. We modeled vegetation change and the probability of occurrence of birds to project changes in winter bird distributions associated with climate change and fire management in the northern Chihuahuan Desert (southwestern U.S.A.). We simulated...
Comparison of load estimation techniques and trend analysis for nitrogen, phosphorus, and suspended sediment in the Eucha-Spavinaw Basin, northwestern Arkansas and northeastern Oklahoma, 2002-10
Rachel A. Esralew, William J. Andrews, Monica L. Allen, Carol Becker
2011, Scientific Investigations Report 2011-5172
The City of Tulsa, Oklahoma, uses water from Lake Eucha and Spavinaw Lake in the Eucha-Spavinaw basin of northwestern Arkansas and northeastern Oklahoma for public water supply. Increases in algal biomass, which cause taste and odor problems in drinking water produced from the lakes, may be attributable to increases in...
Effects of biologically-active chemical mixtures on fish in a wastewater-impacted urban stream
Larry B. Barber, Gregory K. Brown, Todd G. Nettesheim, Elizabeth W. Murphy, Stephen E. Bartell, Heiko L. Schoenfuss
2011, Science of the Total Environment (409) 4720-4728
Stream flow in urban aquatic ecosystems often is maintained by water-reclamation plant (WRP) effluents that contain mixtures of natural and anthropogenic chemicals that persist through the treatment processes. In effluent-impactedstreams, aquatic organisms such as fish are continuously exposed to biologically-activechemicals throughout their life cycles. The North Shore Channel of the...
Selective uptake and biological consequences of environmentally relevant antidepressant pharmaceutical exposures on male fathead minnows
Melissa M. Schultz, Meghan M. Painter, Stephen E. Bartell, Amanda Logue, Edward T. Furlong, Stephen L. Werner, Heiko L. Schoenfuss
2011, Aquatic Toxicology (104) 38-47
Antidepressant pharmaceuticals have been reported in wastewater effluent at the nanogram to low microgram-per-liter range, and include bupropion (BUP), fluoxetine (FLX), sertraline (SER), and venlafaxine (VEN). To assess the effects of antidepressants on reproductive anatomy, physiology, and behavior, adult male fathead minnows (Pimeplwles promelas) were exposed for 21 days either...
Topographic mapping data semantics through data conversion and enhancement
Dalia Varanka, Jonathan Carter, E. Lynn Usery, Thomas Shoberg
Naveen Ashish, Amit P. Sheth, editor(s)
2011, Book chapter, Geospatial semantics and the semantic web
This paper presents research on the semantics of topographic data for triples and ontologies to blend the capabilities of the Semantic Web and The National Map of the U.S. Geological Survey. Automated conversion of relational topographic data of several geographic sample areas to the triple data model standard resulted in relatively poor...
Geologic map of Detrital, Hualapai, and Sacramento Valleys and surrounding areas, northwest Arizona
L. Sue Beard, Jeffrey Kennedy, Margot Truini, Tracey Felger
2011, Open-File Report 2011-1225
A 1:250,000-scale geologic map and report covering the Detrital, Hualapai, and Sacramento valleys in northwest Arizona is presented for the purpose of improving understanding of the geology and geohydrology of the basins beneath those valleys. The map was compiled from existing geologic mapping, augmented by digital photogeologic reconnaissance mapping. The...
Bedrock geologic map of Vermont
Nicholas M. Ratcliffe, Rolfe S. Stanley, Marjorie H. Gale, Peter J. Thompson, Gregory J. Walsh
2011, Scientific Investigations Map 3184
The Bedrock Geologic Map of Vermont is the result of a cooperative agreement between the U.S. Geological Survey (USGS) and the State of Vermont. The State's complex geology spans 1.4 billion years of Earth's history. The new map comes 50 years after the most recent map of the State by...
