Estimating structural dip from gravity and magnetic profile data
Jeffrey Phillips
2010, Conference Paper, SEG technical program expanded abstracts 2010
The anomalies of ideal sources, dipping magnetic contacts and dipping density sheets, provide the theoretical basis for estimating structural dip from gravity and magnetic profile data. The dip is always related to the local phase angle of a complex analytic signal evaluated directly over the source. For magnetic sheets, the...
Attributes for NHDPlus catchments (version 1.1) for the conterminous United States: Average Annual Daily Maximum Temperature, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 490-28
This data set represents the average monthly maximum temperature in Celsius multiplied by 100 for 2002 compiled for every catchment of NHDPlus for the conterminous United States. The source data were the Near-Real-Time High-Resolution Monthly Average Maximum/Minimum Temperature for the Conterminous United States for 2002 raster dataset produced by the...
Genetic analysis of individual origins supports isolation of grizzly bears in the Greater Yellowstone Ecosystem
Mark A. Haroldson, Charles Schwartz, Katherine C. Kendall, Kerry A. Gunther, David S. Moody, Kevin L. Frey, David Paetkau
2010, Ursus (21) 1-13
The Greater Yellowstone Ecosystem (GYE) supports the southernmost of the 2 largest remaining grizzly bear (Ursus arctos) populations in the contiguous United States. Since the mid-1980s, this population has increased in numbers and expanded in range. However, concerns for its long-term genetic health remain because of its presumed continued isolation....
Verification of otolith identity used by fisheries scientists for aging channel catfish
James M. Long, David R. Stewart
2010, Transactions of the American Fisheries Society (139) 1775-1779
Previously published studies of the age estimation of channel catfish Ictalurus punctatus based on otoliths have reported using the sagittae, whereas it is likely they were actually using the lapilli. This confusion may have resulted because in catfishes (ostariophyseans) the lapilli are the largest of the three otoliths, whereas in...
Estimation and modeling of electrofishing capture efficiency for fishes in wadeable warmwater streams
A. Price, James Peterson
2010, North American Journal of Fisheries Management (30) 481-498
Stream fish managers often use fish sample data to inform management decisions affecting fish populations. Fish sample data, however, can be biased by the same factors affecting fish populations. To minimize the effect of sample biases on decision making, biologists need information on the effectiveness of fish sampling methods. We...
National Water-Quality Assessment (NAWQA) Area-Characterization Toolbox
Curtis Price
2010, Report
This is release 1.0 of the National Water-Quality Assessment (NAWQA) Area-Characterization Toolbox. These tools are designed to be accessed using ArcGIS Desktop software (versions 9.3 and 9.3.1). The toolbox is composed of a collection of custom tools that implement geographic information system (GIS) techniques used by the NAWQA Program to...
Evaluating the meaning of “layer” in the Martian north polar layered deposits and the impact on the climate connection
Kathryn E. Fishbaugh, Shane Byrne, Kenneth E. Herkenhoff, Randolph L. Kirk, Corey M. Fortezzo, Patrick S. Russell, Alfred S. McEwen
2010, Icarus (205) 269-282
Using data from the High Resolution Imaging Science Experiment (HiRISE) aboard the Mars Reconnaissance Orbiter, we reassess the methods by which layers within the north polar layered deposits (NPLD) can be delineated and their thicknesses measured. Apparent brightness and morphology alone are insufficient for this task; high resolution topographic data...
Diet shift of lentic dragonfly larvae in response to reduced terrestrial prey subsidies
Johanna M. Kraus
2010, Journal of the North American Benthological Society (29) 602-613
Inputs of terrestrial plant detritus and nutrients play an important role in aquatic food webs, but the importance of terrestrial prey inputs in determining aquatic predator distribution and abundance has been appreciated only recently. I examined the numerical, biomass, and diet responses of a common predator, dragonfly larvae, to experimental...
Regional Variation in mtDNA of the Lesser Prairie-Chicken
Christian A. Hagen, James C. Pitman, Brett K. Sandercock, Don H. Wolfe, Robel J. Robel, Roger D. Applegate, Sara J. Oyler-McCance
2010, The Condor (112) 29-37
Cumulative loss of habitat and long-term decline in the populations of the Lesser Prairie-Chicken (Tympanuchus pallidicinctus) have led to concerns for the species' viability throughout its range in the southern Great Plains. For more efficient conservation past and present distributions of genetic variation need to be understood. We...
Attributes for NHDPlus catchments (Version 1.1) for the conterminous United States: STATSGO soil characteristics
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 490-26
This data set represents estimated soil variables compiled for every catchment of NHDPlus for the conterminous United States. The variables included are cation exchange capacity, percent calcium carbonate, slope, water-table depth, soil thickness, hydrologic soil group, soil erodibility (k-factor), permeability, average water capacity, bulk density, percent organic material, percent clay,...
Geophysical setting of the blue mountain geothermal area, North-Central Nevada and its relationship to a crustal-scale fracture associated with the inception of the Yellowstone hotspot
David A. Ponce, Jonathan M.G. Glen, Janet Watt, John Casteel
2010, Conference Paper, Transactions - Geothermal Resources Council
No abstract available....
Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States: Mean Annual R-factor, 1971-2000
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 490-23
This data set represents the average annual R-factor, rainfall-runoff erosivity measure, compiled for every catchment of NHDPlus for the conterminous United States. The source data are from Christopher Daly of the Spatial Climate Analysis Service, Oregon State University, and George Taylor of the Oregon Climate Service, Oregon State University (2002),...
Relating large-scale climate variability to local species abundance: ENSO forcing and shrimp in Breton Sound, Louisiana, USA
Bryan P. Piazza, Megan K. LaPeyre, B.D. Keim
2010, Climate Research (42) 195-207
Climate creates environmental constraints (filters) that affect the abundance and distribution of species. In estuaries, these constraints often result from variability in water flow properties and environmental conditions (i.e. water flow, salinity, water temperature) and can have significant effects on the abundance and distribution of commercially important nekton species. We...
A methodology for the assessment of unconventional (continuous) resources with an application to the Greater Natural Buttes gas field, Utah
Ricardo A. Olea, Troy A. Cook, James L. Coleman
2010, Natural Resources Research (19) 237-251
The Greater Natural Buttes tight natural gas field is an unconventional (continuous) accumulation in the Uinta Basin, Utah, that began production in the early 1950s from the Upper Cretaceous Mesaverde Group. Three years later, production was extended to the Eocene Wasatch Formation. With the exclusion of 1100 non-productive (“dry”) wells,...
Attributes for NHDPlus catchments (version 1.1) for the conterminous United States: surficial geology
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 490-25
This data set represents the area of surficial geology types in square meters compiled for every catchment of NHDPlus for the conterminous United States. The source data set is the "Digital data set describing surficial geology in the conterminous US" (Clawges and Price, 1999). The NHDPlus Version 1.1 is an...
Executive summary
Peter M. Chapman, William J. Adams, Marjorie L. Brooks, Charles G. Delos, Samuel N. Luoma, William A. Maher, Harry M. Ohlendorf, Theresa S. Presser, D. Patrick Shaw
2010, Book chapter, Ecological assessment of selenium in the aquatic environment
This book on Ecological Assessment of Selenium in the Aquatic Environment synthesizes and advances the state-of-the-science regarding this unique metalloid and identies critical knowledge gaps. Assessment methods appropriate for other metals and metalloids are not always appropriate for selenium (Se). Selenium requires site-specific risk assessments to a much greater extent...
Effects of current-use pesticides on amphibians
C. Lehman, B K Williams
Donald Sparling, Greg L. Linder, Christine A. Bishop, Sherry K. Krest, editor(s)
2010, Book chapter, Ecotoxicology of amphibians and reptiles
For many years, amphibians were understudied in the ecotoxicological literature. In 1989, the Canadian Wildlife Service published a comprehensive review of studies examining the effects of contaminants on amphibians (Power et al. 1989). Just 10 years later, the same organization published an updated review that included twice the number of...
Occupancy and habitat use of the Least Bittern and Pied-Billed Grebe in the Illinois and Upper Mississippi River Valleys
Abigail J. Darrah, David G. Krementz
2010, Waterbirds (33) 367-375
The Least Bittern (Ixobrychus exilis) and the Pied-billed Grebe (Podilymbus podiceps) are secretive marsh bird species that breed in the Illinois and Upper Mississippi River Valleys. Marsh bird surveys were conducted on public and private wetlands in this region during the breeding seasons of 2006 and 2007. Detection probability (ῥ)...
Bioenergetics assessment of fish and crayfish consumption by river otter (Lontra canadensis): integrating prey availability, diet, and field metabolic rate
Matthew P. Dekar, Daniel D. Magoulick, J. Beringer
2010, Canadian Journal of Fisheries and Aquatic Sciences (67) 1439-1448
River otters (Lontra canadensis) are important predators in aquatic ecosystems, but few studies quantify their prey consumption. We trapped crayfish monthly as an index of availability and collected otter scat for diet analysis in the Ozark Mountains of northwestern Arkansas, USA. We measured otter daily energy expenditure (DEE) with the...
Pathology and virus detection in tissues of nestling house sparrows naturally infected with Buggy Creek virus (Togaviridae).
Valerie A. O’Brien, Carol U. Meteyer, S. Ip, Renee Romaine Long, Charles R. Brown
2010, Journal of Wildlife Diseases (46) 23-32
Alphaviruses (Togaviridae) infect wild birds, but clinical illness and death attributable to virus in naturally infected birds is rarely reported, particularly for small passerine species or nestlings. Buggy Creek virus is a unique alphavirus in the Western equine encephalomyelitis virus (WEEV) complex that is vectored by the cimicid swallow bug (Oeciacus vicarius), an ectoparasite...
Possible tradeoffs from urbanization on groundwater recharge and water quality
Kathleen A. Lohse, Erika L. Gallo, Jeffrey R. Kennedy
2010, Southwest Hydrology (9) 18-20
No abstract available....
Ecological assessment of selenium in the aquatic environment
Peter M. Chapman, William J. Adams, Marjorie L. Brooks, Charles G. Delos, Samuel N. Luoma, William A. Maher, Harry M. Ohlendorf, Theresa S. Presser, D. Patrick Shaw, editor(s)
2010, Book
Based on the work and contributions of 46 scientists, managers, and policymakers, Ecological Assessment of Selenium in the Aquatic Environment documents the state of the science and explores how to use this information when assessing and managing the environmental effects of Se. A focused discussion on the fate and effects...
Effect of numerical dispersion as a source of structural noise in the calibration of a highly parameterized saltwater intrusion model
Christian D. Langevin, Joseph D. Hughes
2010, Book, Proceedings 2009 PEST Conference
A model with a small amount of numerical dispersion was used to represent saltwater 7 intrusion in a homogeneous aquifer for a 10-year historical calibration period with one 8 groundwater withdrawal location followed by a 10-year prediction period with two groundwater 9 withdrawal locations. Time-varying groundwater concentrations at arbitrary locations...
Applications of stable isotopes for regional to national-scale water quality and environmental monitoring programs
Carol Kendall, Megan B. Young, Steven R. Silva
J. West, T. Dawson, K. Tu, editor(s)
2010, Book chapter, Isoscapes
Isotopes are a potentially powerful component of monitoring and assessment programs aimed at quantifying and mitigating alterations to environments from human activities. In particular, isotopic techniques have proved useful for tracing sources and sinks of various pollutants in large river basins, wetlands, and airsheds. Many of these studies have been...
Relative gas volume ratios for free gas and gas hydrate accumulations
Ray Boswell, Timothy S Collett, Brian Anderson, Carolyn Ruppel
2010, Newsletter
No abstract available....
