Analysis of continuous GPS measurements from southern Victoria Land, Antarctica
Michael J. Willis
2007, Open-File Report 2007-1047-SRP-064
Several years of continuous data have been collected at remote bedrock Global Positioning System (GPS) sites in southern Victoria Land, Antarctica. Annual to sub-annual variations are observed in the position time-series. An atmospheric pressure loading (APL) effect is calculated from pressure field anomalies supplied by the European Centre for Medium-Range...
Active tectonics on Deception Island (West-Antarctica): A new approach by using the fractal anisotropy of lineaments, fault slip measurements and the caldera collapse shape
R. Perez-Lopez, J. L. Giner-Robles, J.J. Martinez-Diaz, M.A. Rodriguez-Pascua, M. Bejar, C. Paredes, J.M. Gonzalez-Casado
2007, Open-File Report 2007-1047-SRP-086
The tectonic field on Deception Island (South Shetlands, West Antarctica) is determined from structural and fractal analyses. Three different analyses are applied to the study of the strain and stress fields in the area: (1) field measurements of faults (strain analysis), (2) fractal geometry of the spatial distribution of lineaments...
The history of Antarctic Peninsula glaciation
Peter F. Barker
2007, Open-File Report 2007-1047-SRP-042
As Co-Chief Scientist on DSDP Leg 35 in 1974, Cam Craddock (1930-2006) produced the first useful information on Cenozoic Antarctic Peninsula glaciation - an early middle Miocene (15-17 Ma) apparent glacial onset. Subsequent work, onshore and offshore, has greatly extended our knowledge but that early conclusion stands today. Cenozoic Antarctic...
Trends in discharge and flow season timing of the Onyx River, Wright Valley, Antarctica since 1969
Michael N. Gooseff, Diane M. McKnight, Peter T. Doran, W. Berry Lyons
2007, Open-File Report 2007-1047-SRP-088
Flow records at the two stream gauges on the Onyx River represent the longest actively collected environmental records in the McMurdo Dry Valleys, Antarctica. The downstream gauge, near Lake Vanda, has been collecting data since 1969, and the upstream gauge, at Lower Wright Glacier (LWRT), has collected data since 1972....
Geophysical survey reveals tectonic structures in the Amundsen Sea embayment, West Antarctica
K. Gohl, G. Eagles, G. Netzeband, J.W.G. Grobys, N. Parsiegla, P. Schluter, V. Leinweber, R.D. Larter, G. Uenzelmann-Neben, G.B. Udintsev
2007, Open-File Report 2007-1047-SRP-047
The Amundsen Sea embayment of West Antarctica is in a prominent location for a series of tectonic and magmatic events from Paleozoic to Cenozoic times. Seismic, magnetic and gravity data from the embayment and Pine Island Bay (PIB) reveal the crustal thickness and some tectonic features. The Moho is 24-22 km...
Geometrical analysis of structural data collected at high South latitude: A modular arithmetic method that addresses meridional convergence
C.S. Siddoway, M.F. Siddoway
2007, Open-File Report 2007-1047-SRP-061
The convergence of meridians toward the South Pole causes unique problems for geometrical comparison of structural geological and geophysical datasets from Antarctica. The true North reference direction ordinarily is used for measuring and reporting vector data (strike, trend) in Antarctica, as elsewhere. However, over a latitude distance of just 100...
Cretaceous oblique detachment tectonics in the Fosdick Mountains, Marie Byrd Land, Antarctica
R. McFadden, C.S. Siddoway, C. Teyssier, C.M. Fanning, S.C. Kruckenberg
2007, Open-File Report 2007-1047-SRP-046
The Fosdick Mountains form an E-W trending migmatite dome in the northern Ford Ranges of Marie Byrd Land, Antarctica. Pervasively folded migmatites derived from lower Paleozoic greywacke and middle Paleozoic plutonic rocks constitute the dome. New field research documents a transition from melt-present to solid-state deformation across the south flank...
Vertical motions in Northern Victoria Land inferred from GPS: A comparison with a glacial isostatic adjustment model
F. Mancini, M. Negusini, A. Zanutta, A. Capra
2007, Open-File Report 2007-1047-SRP-073
Following the densification of GPS permanent and episodic trackers in Antarctica, geodetic observations are playing an increasing role in geodynamics research and the study of the glacial isostatic adjustment (GIA). The improvement in geodetic measurements accuracy suggests their use in constraining GIA models. It is essential to have a deeper...
Road impacts on the Baca National Wildlife Refuge, Colorado, with emphasis on effects to surface- and shallow ground-water hydrology - A literature review
Douglas C. Andersen
2007, Open-File Report 2007-1052
A review of published research on unpaved road effects on surface-water and shallow ground-water hydrology was undertaken to assist the Baca National Wildlife Refuge, Colorado, in understanding factors potentially influencing refuge ecology. Few studies were found that addressed hydrological effects of roads on a comparable area of shallow slope in...
Herpetofaunal Inventories of the National Parks of South Florida and the Caribbean: Volume IV. Biscayne National Park
Kenneth G. Rice, J. Hardin Waddle, Marquette E. Crockett, Christopher D. Bugbee, Brian M. Jeffery, H. Franklin Percival
2007, Open-File Report 2007-1057
Amphibian declines and extinctions have been documented around the world, often in protected natural areas. Concern for this alarming trend has prompted the U.S. Geological Survey and the National Park Service to document all species of amphibians that occur within U.S. National Parks and to search for any signs that...
Fort Collins Science Center: 2006 Accomplishments
Juliette T. Wilson, editor(s)
2007, Open-File Report 2007-1154
In Fiscal Year 2006 (FY06), the U.S. Geological Survey (USGS) Fort Collins Science Center (FORT) continued research vital to U.S. Department of the Interior (DOI) science and management needs and associated USGS programmatic goals. FORT work also supported the science needs of other governmental departments and agencies as well as...
Visitor and community survey results for Prime Hook National Wildlife Refuge: Completion report
Natalie R. Sexton, Susan C. Stewart, Lynne Koontz, Phadrea Ponds, Katherine D. Walters
2007, Open-File Report 2007-1239
This study was commissioned by the Northeast Region of the U.S. Fish and Wildlife Service (USFWS) in support of the Comprehensive Conservation Planning at Prime Hook National Wildlife Refuge (Prime Hook NWR or Refuge). The National Wildlife Refuge Improvement Act of 1997 (Public Law 105-57, USC668dd) mandates a Comprehensive Conservation...
Oregon Spotted Frog (Rana pretiosa) movement and demography at Dilman Meadow: Implications for future monitoring
Nathan D. Chelgren, Christopher A. Pearl, Jay Bowerman, M. J. Adams
2007, Open-File Report 2007-1016
From 2001 to 2005, we studied the demography and seasonal movement of Oregon spotted frogs (Rana pretiosa) translocated into created ponds in Dilman Meadow in central Oregon. Our objectives were to inform future monitoring and management at the site, and to elucidate poorly known aspects of the species’ population ecology....
Aerial population estimates of wild horses (Equus caballus) in the adobe town and salt wells creek herd management areas using an integrated simultaneous double-count and sightability bias correction technique
Bruce C. Lubow, Jason I. Ransom
2007, Open-File Report 2007-1274
An aerial survey technique combining simultaneous double-count and sightability bias correction methodologies was used to estimate the population of wild horses inhabiting Adobe Town and Salt Wells Creek Herd Management Areas, Wyoming. Based on 5 surveys over 4 years, we conclude that the technique produced estimates consistent with the known...
Simulation of flow and habitat conditions under ice, Cache la Poudre River - January 2006
Terry Waddle
2007, Open-File Report 2007-1282
The U.S. Forest Service authorizes the occupancy and use of Forest Service lands by various projects, including water storage facilities, under the Federal Land Policy and Management Act. Federal Land Policy and Management Act permits can be renewed at the end of their term. The U.S. Forest Service analyzes the...
Field-based evaluations of sampling techniques to support long-term monitoring of riparian ecosystems along wadeable streams on the Colorado Plateau
Michael L. Scott, Elizabeth W. Reynolds
2007, Open-File Report 2007-1266
To better plan for and implement long-term ecological monitoring, we measured riparian vegetation and fluvial geomorphic features at pilot study sites on four wadeable perennial stream reaches, representative of drainages across the Colorado Plateau. Our primary objectives were to (1) collect field data, (2) evaluate the efficiency and effectiveness of...
Environmental effects of off-highway vehicles on Bureau of Land Management lands: A literature synthesis, annotated bibliographies, extensive bibliographies, and internet resources
Douglas S. Ouren, Christopher Haas, Cynthia P. Melcher, Susan C. Stewart, Phadrea D. Ponds, Natalie R. Sexton, Lucy Burris, Tammy S. Fancher, Zachary H. Bowen
2007, Open-File Report 2007-1353
This report and its associated appendixes compile and synthesize the results of a comprehensive literature and Internet search conducted in May 2006. The literature search was undertaken to uncover information regarding the effects of off-highway vehicle (OHV) use on land health, or “natural resource attributes,” and included databases archiving information...
Preliminary testing of the role of exercise and predator recognition for bonytail and razorback sucker
Gordon A. Mueller, Jeanette Carpenter, Robert Krapfel, Chester Figiel
2007, Open-File Report 2007-1423
Hatchery-reared juvenile, <25-cm TL (total length), razorback suckers appeared curious and showed no sign of predator avoidance when initially placed with large (>45-cm TL) flathead catfish. Predator-naïve juveniles (20- to 25-cm TL) exhibited no discernable preference when provided areas with and without (52 percent and 48 percent, n = 16...
Understanding knowledge and perceptions of bats among residents of Fort Collins, Colorado
Natalie R. Sexton, Susan C. Stewart
2007, Open-File Report 2007-1245
As regional urbanization increases in Colorado, so do interactions between humans and wildlife. Where previous habitat has been reduced due to urbanization and development, a few bat species that easily adapt to new environments now roost in homes and buildings (Kunz and Reynolds, 2003). Bats frequently serve as reservoirs of...
A comparison of macroinvertebrate and habitat methods of data collection in the Little Colorado River Watershed, Arizona 2007
Patrice Spindler, Nick V. Paretti
2007, Open-File Report 10-05
The Arizona Department of Environmental Quality (ADEQ) and the U.S. Environmental Protection Agency (USEPA) Ecological Monitoring and Assessment Program (EMAP), use different field methods for collecting macroinvertebrate samples and habitat data for bioassessment purposes. Arizona’s Biocriteria index was developed using a riffle habitat sampling methodology, whereas the EMAP method employs...
Increase in nuisance blooms and geographic expansion of the freshwater diatom Didymosphenia geminata
S. A. Spaulding, E. Elwell
2007, Open-File Report 2007-1425
The diatom Didymosphenia geminata (Lyngbye) Schmidt is emerging as an organism with an extraordinary capacity to impact stream ecosystems on a global scale. In recent years, streams in New Zealand, North America, Europe, and Asia have been colonized by unprecedented masses of “didymo” and its extracellular stalks (fig. 1). This...
Applying radar technology to migratory bird conservation and management: Strengthening and expanding a collaborative
Janet M. Ruth, Albert Manville, Ron Larkin, Wylie C. Barrow, Lori Johnson-Randall, Deanna K. Dawson, Robert H. Diehl, Yufang Wang, Richard S. Sojda, Rafal Angryk, Robert W. Klaver, Reggie Mead, John Paxton, Patricia J. Heglund, Eileen Kirsch, Manuel J. Suarez, Larry Robinson, Sidney A. Gauthreaux Jr., Carroll G. Belser, Steven J. Franke, Bruno Bruderer, Jeffrey J. Buler, Frank R. Moore, David S. Mizrahi, Robert Fogg, T. Adam Kelly, Paul M. Cryan, Tim Crum, Terry J. Schuur, Dave Krueper, Robb Diehl, Tom Will
Janet M. Ruth, editor(s)
2007, Open-File Report 2007-1361
Executive Summary Understanding the factors affecting migratory bird and bat populations during all three phases of their life cycle—breeding, nonbreeding, and migration—is critical to species conservation planning. This includes the need for information about these species’ responses to natural challenges, as well as information about the effects of human activities and...
Evaluating the potential for watershed restoration to reduce nutrient loading to Upper Klamath Lake, Oregon
Paul V. McCormick, Sharon G. Campbell
2007, Open-File Report 2007-1168
A literature review of best management practices to reduce nutrient loading was performed to provide information for resource managers in the Klamath Basin, Oregon. Although BMPs have already been implemented in the watershed, some sense of their effectiveness in reducing phosphorus loading and their cost for installation and maintenance is...
USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States: A section in Digital mapping techniques '06 - Workshop proceedings
Suzanne W. Nicholson, Douglas B. Stoeser, Frederic H. Wilson, Connie L. Dicken, Stephen Ludington
2007, Open-File Report 2007-1285
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for regional and national digital geologic maps attributed with age and rock type information. Such spatial data can be conveniently used to generate derivative maps for purposes that include mineral-resource assessment, metallogenic studies, tectonic studies, human...
Major and Trace-Element Data from Stream-Sediment and Rock Samples Collected in the Taylor Mountains 1:250,000-Scale Quadrangle, Alaska
Elizabeth A. Bailey, Gregory K. Lee, Seth H. Mueller, Bronwen Wang, Zoe Ann Brown, Greg A. Beischer
2007, Open-File Report 2007-1196
In the summers of 2004, 2005, and 2006, the U.S. Geological Survey conducted a reconnaissance geochemical survey of the drainage basins throughout most of the Taylor Mountains 1:250,000-scale quadrangle, in southwestern Alaska. The purpose of the study was to locate areas of potential interest for ore minerals, provide data that...
