Well log and 2D seismic data character of the Wilcox Group in south-central Louisiana
Catherine B. Enomoto
2014, Gulf Coast Association of Geological Societies Transactions (64) 105-118
Well logs and 2D seismic data were used to interpret the depth and morphology of potential Paleocene and lower Eocene Wilcox Group slope and basin-floor reservoirs in south-central Louisiana. These may occur in a poorly explored area previously estimated by the U.S. Geological Survey to contain a mean undiscovered conventional...
The Wallula fault and tectonic framework of south-central Washington, as interpreted from magnetic and gravity anomalies
Richard J. Blakely, Brian L. Sherrod, Craig S. Weaver, Ray E. Wells, Alan C. Rohay
2014, Tectonophysics (624-625) 32-45
The Yakima fold and thrust belt (YFTB) in central Washington has accommodated regional, mostly north-directed, deformation of the Cascadia backarc since prior to emplacement of Miocene flood basalt of the Columbia River Basalt Group (CRBG). The YFTB consists of two structural domains. Northern folds of the YFTB strike eastward and...
"Report a Landslide” A website to engage the public in identifying geologic hazards
Rex L. Baum, Lynn M. Highland, Peter T. Lyttle, Jeremy Fee, Eric Martinez, Lisa A. Wald
2014, Conference Paper, Landslide science for a safer geoenvironment, Vol.1: The International Programme on Landslides (IPL)
Direct observation by people is the most practical way of identifying, locating, and describing most damaging landslides. In an effort to increase public awareness of landslide hazards and encourage public participation in collecting basic data about landslides, the USGS recently launched a website called “Report a landslide.” The website is...
Metals, organic compounds, and nutrients in Long Island Sound: sources, magnitudes, trends, and impacts
John R. Mullaney, J.C. Varekamp, A.E. MCElroy, V.T. Brsslin
2014, Book chapter, Long Island Sound
Long Island Sound (LIS) is a relatively shallow estuary with a mean depth of 20 m (maximum depth 49 m) and a unique hydrology and history of pollutant loading. Those factors have contributed to a wide variety of contamination problems in its muddy sediments, aquatic life and water column....
Development and characterization of 12 microsatellite markers for the Island Night Lizard (Xantusia riversiana), a threatened species endemic to the Channel Islands, California, USA
Ryan P. O’Donnell, Charles A. Drost, Karen E. Mock
2014, Conservation Genetics Resources (6) 699-700
The Island Night Lizard is a federally threatened species endemic to the Channel Islands of California. Twelve microsatellite loci were developed for use in this species and screened in 197 individuals from across San Nicolas Island, California. The number of alleles per locus ranged from 6 to 21. Observed heterozygosities...
Assessment of lesser prairie-chicken use of wildlife water guzzlers
Clint W. Boal, Philip K. Borsdorf, Trevor S. Gicklhorn
2014, Bulletin of the Texas Ornithological Society (46) 10-18
Man-made water sources have been used as a management tool for wildlife, especially in arid regions, but the value of these water sources for wildlife populations is not well understood. In particular, the value of water as a conservation tool for Lesser Prairie-Chickens (Tympanuchus pallidicinctus) is unknown. However, this is...
Survival of female white-cheeked pintails during brood rearing in Puerto Rico
Marisel Lopez-Flores, J. Brian Davis, Francisco Vilella, Richard M. Kaminski, Jose A. Cruz-Burgos, Joseph D. Lancaster
2014, Caribbean Naturalist (10) 1-12
Anas bahamensis (White-cheeked Pintail) is widely distributed across the Caribbean islands and South America. The species is classified as threatened in Puerto Rico and a species of least concern across most of its range. Little demographic data exist for the species, particularly during the breeding season. During 2000-2002, we radiomarked...
Preliminary testing of flow-ecology hypotheses developed for the GCP LCC region
Shannon K. Brewer, Mary Davis
2014, Cooperator Science Series FWS/CSS-108-2014
The Ecological Limits of Hydrological Alteration (ELOHA) framework calls for the development of flow-ecology hypotheses to support protection of the flow regime from ecologically harmful alteration due to human activities. As part of a larger instream flow project for the Gulf Coast Prairie Landscape Conservation Cooperative (GCP LCC), regional flow-ecology...
Application of hydrologic tools and monitoring to support managed aquifer recharge decision making in the Upper San Pedro River, Arizona, USA
Laurel J. Lacher, Dale S. Turner, Bruce Gungle, Brooke M. Bushman, Holly E. Richter
2014, Water (6) 3495-3527
The San Pedro River originates in Sonora, Mexico, and flows north through Arizona, USA, to its confluence with the Gila River. The 92-km Upper San Pedro River is characterized by interrupted perennial flow, and serves as a vital wildlife corridor through this semiarid to arid region. Over the past century,...
Quantifying spatial scaling patterns and their local and regional correlates in headwater streams: Implications for resilience
Emma Gothe, Leonard Sandin, Craig R. Allen, David G. Angeler
2014, Ecology and Society (19)
The distribution of functional traits within and across spatiotemporal scales has been used to quantify and infer the relative resilience across ecosystems. We use explicit spatial modeling to evaluate within- and cross-scale redundancy in headwater streams, an ecosystem type with a hierarchical and dendritic network structure. We assessed the cross-scale...
Backcasting the decline of a vulnerable Great Plains reproductive ecotype: identifying threats and conservation priorities
Thomas A. Worthington, Shannon K. Brewer, Timothy B. Grabowski, Julia Mueller
2014, Global Change Biology (20) 89-102
Conservation efforts for threatened or endangered species are challenging because the multi-scale factors that relate to their decline or inhibit their recovery are often unknown. To further exacerbate matters, the perceptions associated with the mechanisms of species decline are often viewed myopically rather than across the entire species range. We...
Arsenic associated with historical gold mining in the Sierra Nevada foothills: Case study and field trip guide for Empire Mine State Historic Park, California
Charles N. Alpers, Perry A Myers, Daniel Millsap, Tamsen B Regnier
Robert J. Bowell, Charles N. Alpers, Heather E. Jamieson, D. Kirk Nordstrom, Juraj Majzlan, editor(s)
2014, Reviews in Mineralogy and Geochemistry (79) 553-587
The Empire Mine, together with other mines in the Grass Valley mining district, produced at least 21.3 million troy ounces (663 tonnes) of gold (Au) during the 1850s through the 1950s, making it the most productive hardrock Au mining district in California history (Clark 1970). The Empire Mine...
Understanding the value of imperfect science from national estimates of bird mortality from window collisions
Craig S. Machtans, Wayne E. Thogmartin
2014, Condor (116) 3-7
The publication of a U.S. estimate of bird–window collisions by Loss et al. is an example of the somewhat contentious approach of using extrapolations to obtain large-scale estimates from small-scale studies. We review the approach by Loss et al. and other authors who have published papers on human-induced avian mortality...
Multielevation calibration of frequency-domain electromagnetic data
Burke J. Minsley, M. Andy Kass, Greg Hodges, Bruce D. Smith
2014, Geophysics (79) E201-E216
Systematic calibration errors must be taken into account because they can substantially impact the accuracy of inverted subsurface resistivity models derived from frequency-domain electromagnetic data, resulting in potentially misleading interpretations. We have developed an approach that uses data acquired at multiple elevations over the same location to assess calibration errors....
Gymnophthalmus speciosus (golden spectacled tegu): predation by great egret
Robert P. Reynolds, James F. Whatton, Christina A. Gebhard
2014, Herpetological Review (45) 128
No abstract available....
Delineation of Tundra Swan Cygnus c. columbianus populations in North America: geographic boundaries and interchange
Craig R. Ely, William J.L. Sladen, Heather M. Wilson, Susan E. Savage, Kristine M. Sowl, Bill Henry, Mike Schwitters, James Snowden
2014, Wildfowl (64) 132-147
North American Tundra Swans Cygnus c. columbianus are composed of two wellrecognised populations: an Eastern Population (EP) that breeds across northern Canada and north of the Brooks Range in Alaska, which migrates to the eastern seaboard of the United States, and a Western Population (WP) that breeds in coastal regions of Alaska south of the Brooks...
U.S. Geological Survey Science for the Wyoming Landscape Conservation Initiative - 2013 Annual Report
Zachary H. Bowen, Cameron L. Aldridge, Patrick J. Anderson, Timothy J. Assal, Carleton R. Bern, Laura R Biewick, Gregory K. Boughton, Anna D. Chalfoun, Geneva W. Chong, Marie K. Dematatis, Bradley C. Fedy, Steven L. Garman, Steve Germaine, Matthew G. Hethcoat, Collin G. Homer, Christopher Huber, Matthew J. Kauffman, Natalie Latysh, Daniel J. Manier, Cynthia P. Melcher, Kirk A. Miller, Christopher J. Potter, Spencer Schell, Michael J. Sweat, Annika W. Walters, Anna B. Wilson
2014, Open-File Report 2014-1213
This is the sixth report produced by the U.S. Geological Survey (USGS) for the Wyoming Landscape Conservation Initiative (WLCI) to detail annual activities conducted by USGS for addressing specific management needs identified by WLCI partners. In FY2013, there were 25 ongoing and new projects conducted by the USGS. These projects...
Using spatial resampling to assess redd count survey length requirements for Pacific Lamprey
M.P. Mayfield, L. D. Schultz, Lance A. Wyss, M.E. Colvin, Carl B. Schreck
2014, North American Journal of Fisheries Management (34) 923-931
Pacific Lamprey Entosphenus tridentatus has declined across its range along the West Coast of North America, and an understanding of all life history phases is needed to address population recovery. Spawning surveys (redd counts) are common tools currently used to monitor returning adult salmonids, but such methodologies are in their infancy for...
Two approaches for incorporating climate change into natural resource management planning at Wind Cave National Park
Amy J. Symstad, Andrew J. Long, John Stamm, David A. King, Dominque M. Bachelet, Parker A. Norton
2014, Report
Wind Cave National Park (WICA) protects one of the world’s longest caves, has large amounts of high quality, native vegetation, and hosts a genetically important bison herd. The park’s relatively small size and unique purpose within its landscape requires hands-on management of these and other natural resources, all of which...
Fisheries research and monitoring activities of the Lake Erie Biological Station, 2013
Richard T. Kraus, Mark W. Rogers, Patrick Kocovsky, William Edwards, Betsy L. Bodamer Scarbro, Kevin R. Keretz, Stephanie A. Berkman
2014, Report, Compiled Reports to the Great Lakes Fishery Commission of the Annual Bottom Trawl and Acoustic Surveys, 2013
In 2013, the U.S. Geological Survey’s Lake Erie Biological Station successfully completed large vessel surveys in all three of Lake Erie’s basins. Lake Erie Biological Station’s primary vessel surveys included the Western Basin Forage Fish Assessment and East Harbor Forage Fish Assessment as well as contributing to the cooperative multi-agency...
Fertilizer consumption and energy input for 16 crops in the United States
Sheila E. Amenumey, Paul D. Capel
2014, Natural Resources Research (23) 299-309
Fertilizer use by U.S. agriculture has increased over the past few decades. The production and transportation of fertilizers (nitrogen, N; phosphorus, P; potassium, K) are energy intensive. In general, about a third of the total energy input to crop production goes to the production of fertilizers, one-third to mechanization, and...
An ecological response model for the Cache la Poudre River through Fort Collins
Jennifer Shanahan, Daniel Baker, Brian P. Bledsoe, LeRoy Poff, David M. Merritt, Kevin R. Bestgen, Gregor T. Auble, Boris C. Kondratieff, John Stokes, Mark Lorie, John Sanderson
2014, Report
The Poudre River Ecological Response Model (ERM) is a collaborative effort initiated by the City of Fort Collins and a team of nine river scientists to provide the City with a tool to improve its understanding of the past, present, and likely future conditions of the Cache la Poudre River...
Stratigraphy, structure and regional correlation of eastern Blue Ridge sequences in southern Virginia and northwestern North Carolina: an interim report from new USGS mapping
Mark W. Carter, Arthur J. Merschat
2014, GSA Field Guides (35) 215-241
Examination of key outcrops in the eastern Blue Ridge in southern Virginia and northwestern North Carolina is used to evaluate existing stratigraphic and structural models. Recent detailed mapping along the Blue Ridge Parkway and the eastern flank of the Mount Rogers massif provides the opportunity to (1) evaluate legacy...
Forest ecosystem reorganization underway in the Southwestern US: A preview of widespread forest changes in the Anthropocene
Craig D. Allen
V. Alaric Sample, R. Patrick Bixler, editor(s)
2014, Proceedings RMRS-P-71
No abstract available....
Frictional properties of exhumed fault gouges in DFDP-1 cores, Alpine Fault, New Zealand
Carolyn Boulton, Diane E. Moore, David A. Lockner, Virginia G. Toy, John Townend, Rupert Southerland
2014, Geophysical Research Letters (41) 356-362
Principal slip zone gouges recovered during the Deep Fault Drilling Project (DFDP-1), Alpine Fault, New Zealand, were deformed in triaxial friction experiments at temperatures, T, of up to 350°C, effective normal stresses, σn′, of up to 156 MPa, and velocities between 0.01 and 3 µm/s. Chlorite/white mica-bearing DFDP-1A blue gouge, 90.62 m sample depth, is...
