Stationarity: Wanted dead or alive?
Larry F. Lins, Timothy A. Cohn
2011, Journal of the American Water Resources Association (47) 475-480
Aligning engineering practice with natural process behavior would appear, on its face, to be a prudent and reasonable course of action. However, if we do not understand the long-term characteristics of hydroclimatic processes, how does one find the prudent and reasonable course needed for water management? We consider this question...
Mortality of American alligators attributed to cannibalism
Michael F. Delany, Allan R. Woodward, Richard A. Kiltie, Clinton T. Moore
2011, Herpetologica (67) 174-185
Mortality of juvenile (Alligator mississippiensis) attributed to cannibalism on Orange Lake, Florida was examined. Alligator web tags used in mark–recapture studies were found in 12% of 267 stomachs sampled from alligators ≥168 cm TL. Captive alligators retained 76% of force-fed tags during a...
Monitoring bald eagles using lists of nests: Response to Watts and Duerr
John R. Sauer, Mark C. Otto, William L. Kendall, Guthrie S. Zimmerman
2011, Journal of Wildlife Management (75) 509-512
The post-delisting monitoring plan for bald eagles (Haliaeetus leucocephalus) roposed use of a dual-frame sample design, in which sampling of known nest sites in combination with additional area-based sampling is used to estimate total number of nesting bald eagle pairs. Watts and Duerr (2010) used data from repeated observations of...
Modifications of traps to reduce bycatch of freshwater turtles
R. Bruce Bury
2011, Journal of Wildlife Management (75) 3-5
Mortality of freshwater turtles varies among types and deployments of traps. There are few or no losses in hoop or fyke traps set where turtles may reach air, including placement in shallows, addition of floats on traps, and tying traps securely to a stake or to shore. Turtle mortality occurs...
Modules based on the geochemical model PHREEQC for use in scripting and programming languages
Scott R. Charlton, David L. Parkhurst
2011, Computers & Geosciences (37) 1653-1663
The geochemical model PHREEQC is capable of simulating a wide range of equilibrium reactions between water and minerals, ion exchangers, surface complexes, solid solutions, and gases. It also has a general kinetic formulation that allows modeling of nonequilibrium mineral dissolution and precipitation, microbial reactions, decomposition of organic compounds, and other...
How reservoirs alter drinking water quality: Organic matter sources, sinks, and transformations
Tamara E.C. Kraus, Brian A. Bergamaschi, Peter J. Hernes, Daniel H. Doctor, Carol Kendall, Bryan D. Downing, Richard F. Losee
2011, Lake and Reservoir Management (27) 205-219
Within reservoirs, production, transformation, and loss of dissolved organic matter (DOM) occur simultaneously. While the balance between production and loss determines whether a reservoir is a net sink or source of DOM, changes in chemical composition are also important because they affect DOM reactivity with respect to disinfection by-product (DBP)...
Impacts of invasive plants on Sandhill Crane (Grus canadensis) roosting habitat
Andrew C. Kessler, James W. Merchant, Craig R. Allen, Steven D. Shultz
2011, Invasive Plant Science and Management (4) 369-377
Invasive plants continue to spread in riparian ecosystems, causing both ecological and economic damage. This research investigated the impacts of common reed, purple loosestrife, riparian shrubland, and riparian woodlands on the quality and quantity of sandhill crane roosting habitat in the central Platte River, Nebraska, using a discrete choice model....
Is the model a misfit in Hawaii? The North American model in our most recent state
Christopher A. Lepczyk, Edwin D. Johnson, Steven C. Hess
2011, The Wildlife Professional (5) 64-67
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...
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...
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...
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...
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...
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...
An adaptive approach to invasive plant management on U.S. Fish and Wildlife Service-owned native prairies in the Prairie Pothole Region: decision support under uncertainity
Jill J. Gannon, Clinton T. Moore, Terry L. Shaffer, Bridgette Flanders-Wanner
2011, Book, North American Prairie Conference
Much of the native prairie managed by the U.S. Fish and Wildlife Service (Service) in the Prairie Pothole Region (PPR) is extensively invaded by the introduced cool-season grasses smooth brome (Bromus inermis) and Kentucky bluegrass (Poa pratensis). The central challenge to managers is selecting appropriate management actions in the face...
Peak-flow characteristics of Virginia streams
Samuel H. Austin, Jennifer L. Krstolic, Ute Wiegand
2011, Scientific Investigations Report 2011-5144
Peak-flow annual exceedance probabilities, also called probability-percent chance flow estimates, and regional regression equations are provided describing the peak-flow characteristics of Virginia streams. Statistical methods are used to evaluate peak-flow data. Analysis of Virginia peak-flow data collected from 1895 through 2007 is summarized. Methods are provided for estimating unregulated peak...
Comparison of two parametric methods to estimate pesticide mass loads in California's Central Valley
Dina K. Saleh, David L. Lorenz, Joseph L. Domagalski
2011, Journal of the American Water Resources Association (47) 254-264
Mass loadings were calculated for four pesticides in two watersheds with different land uses in the Central Valley, California, by using two parametric models: (1) the Seasonal Wave model (SeaWave), in which a pulse signal is used to describe the annual cycle of pesticide occurrence in a stream, and (2)...
Sudden clearing of estuarine waters upon crossing the threshold from transport to supply regulation of sediment transport as an erodible sediment pool is depleted: San Francisco Bay, 1999
David H. Schoellhamer
2011, Estuaries and Coasts (34) 885-899
The quantity of suspended sediment in an estuary is regulated either by transport, where energy or time needed to suspend sediment is limiting, or by supply, where the quantity of erodible sediment is limiting. This paper presents a hypothesis that suspended-sediment concentration (SSC) in estuaries can suddenly decrease when the...
Statistical models of temperature in the Sacramento-San Joaquin Delta under climate-change scenarios and ecological implications
R. Wayne Wagner, Mark T. Stacey, Larry R. Brown, Mike Dettinger
2011, Estuaries and Coasts (34) 544-556
Changes in water temperatures caused by climate change in California's Sacramento–San Joaquin Delta will affect the ecosystem through physiological rates of fishes and invertebrates. This study presents statistical models that can be used to forecast water temperature within the Delta as a response to atmospheric conditions. The daily average model...
Source and delivery of nutrients to receiving waters in the Northeastern and Mid-Atlantic regions of the United States
Richard B. Moore, Criag M. Johnston, Richard A. Smith, Bryan Milstead
2011, Journal of the American Water Resources Association (47) 965-990
This study investigates nutrient sources and transport to receiving waters, in order to provide spatially detailed information to aid water-resources managers concerned with eutrophication and nutrient management strategies. SPAtially Referenced Regressions On Watershed attributes (SPARROW) nutrient models were developed for the Northeastern and Mid-Atlantic (NE US) regions of the United...
Stratigraphy and depositional environments of the upper Pleistocene Chemehuevi Formation along the lower Colorado River
Daniel V. Malmon, Keith A. Howard, P. Kyle House, Scott C. Lundstrom, Philip A. Pearthree, Andrei M. Sarna-Wojcicki, Elmira Wan, David B. Wahl
2011, Professional Paper 1786
The Chemehuevi Formation forms a conspicuous, widespread, and correlative set of nonmarine sediments lining the valleys of the Colorado River and several of its larger tributaries in the Basin and Range geologic province. These sediments have been examined by geologists since J. S. Newberry visited the region in 1857 and...
Demographic consequences of migratory stopover: Linking red knot survival to horseshoe crab spawning abundance
Conor P. McGowan, James E. Hines, James D. Nichols, James E. Lyons, David Smith, Kevin S. Kalasz, Lawrence J. Niles, Amanda D. Dey, Nigel A. Clark, Philip W. Atkinson, Clive D.T. Minton, William Kendall
2011, Ecosphere (2)
Understanding how events during one period of the annual cycle carry over to affect survival and other fitness components in other periods is essential to understanding migratory bird demography and conservation needs. Previous research has suggested that western Atlantic red knot (Calidris canutus rufa) populations are greatly affected by horseshoe...
