Pigs on the plains: Institutional analysis of a Colorado water quality initiative
D. King, N. Burkardt, Lamb B. Lee
2006, International Journal of Public Administration (29) 1411-1430
We used the Legal-Institutional Analysis Model (LIAM) and Advocacy Coalition Framework (ACF) to analyze the campaign over passage of the Colorado Hogs Rule, an initiative passed by the voters in 1998 to require regulation of swine production facilities in Colorado. Used in tandem, LIAM and ACF provided an opportunity to...
Estimating the abundance of prairie dogs
Dean E. Biggins, John G. Sidle, D.B. Seery, A. E. Ernst
2006, Book chapter, Conservation of the black-tailed prairie dog: saving North America's western grasslands
No abstract available....
Conservation of prairie dogs in areas with plague
J.F. Cully, Dean E. Biggins, D.B. Seery
2006, Book chapter, Conservation of the black-tailed prairie dog: saving North America's western grasslands
No abstract available....
Seismoelectric numerical modeling on a grid
S.S. Haines, S.R. Pride
2006, Geophysics (71)
Our finite-difference algorithm provides a new method for simulating how seismic waves in arbitrarily heterogeneous porous media generate electric fields through an electrokinetic mechanism called seismoelectric coupling. As the first step in our simulations, we calculate relative pore-fluid/grain-matrix displacement by using existing poroelastic theory. We then calculate the electric current...
The symposium in context
Dean E. Biggins
2006, Conference Paper, Recovery of the black-footed ferret: Progress and continuing challenges- Proceedings of the Symposium on the Status of the Black-footed Ferret and Its Habitat, Fort Collins, Colorado, January 28-29, 2004 (Scientific Investigations Report 2005-5293)
The black-footed ferret (Mustela nigripes) is a member of the weasel family (Mustelidae) and is closely related to the Siberian polecat (M. eversmannii) of Asian steppes and the European polecat (M. putorius). Compared to its relatives, the black-footed ferret is an extreme specialist, depending on the prairie dogs (Cynomys spp.)...
Radio telemetry for black-footed ferret research and monitoring
Dean E. Biggins, Jerry L. Godbey, Brian J. Miller, Louis R. Hanebury
2006, Conference Paper, Recovery of the black-footed ferret: Progress and continuing challenges- Proceedings of the Symposium on the Status of the Black-footed Ferret and Its Habitat, Fort Collins, Colorado, January 28-29, 2004 (Scientific Investigations Report 2005-5293)
By 1973, radio telemetry was regarded as an important potential tool for studying the elusive, nocturnal, and semifossorial black-footed ferret (Mustela nigripes), but fears of using invasive techniques on this highly endangered mammal caused delays. We began radio collaring ferrets in 1981. Use of radio telemetry on ferrets proved to...
Modeling nearshore morphological evolution at seasonal scale
D.-J.R. Walstra, P. Ruggiero, G. Lesser, G. Gelfenbaum
2006, Conference Paper, Coastal Dynamics 2005 - Proceedings of the Fifth Coastal Dynamics International Conference
A process-based model is compared with field measurements to test and improve our ability to predict nearshore morphological change at seasonal time scales. The field experiment, along the dissipative beaches adjacent to Grays Harbor, Washington USA, successfully captured the transition between the high-energy erosive conditions of winter and the low-energy...
Different time and energy budgets of Lesser Snow Geese in rice-prairies and coastal marshes in southwest Louisiana
J.E. Jonsson, A. D. Afton
2006, Waterbirds (29) 451-458
Many bird species use human-made habitats and an important issue is whether these are equally suitable foraging habitats as are historical, natural habitats. Historically, Lesser Snow Geese (Chen caerulescens caerulescens, hereafter Snow Geese) wintered in coastal marshes in Louisiana but began using rice-prairies within the last 60 years. Time spent...
Fuel loads, fire regimes, and post-fire fuel dynamics in Florida Keys pine forests
J.P. Sah, M.S. Ross, J.R. Snyder, S. Koptur, H.C. Cooley
2006, International Journal of Wildland Fire (15) 463-478
In forests, the effects of different life forms on fire behavior may vary depending on their contributions to total fuel loads. We examined the distribution of fuel components before fire, their effects on fire behavior, and the effects of fire on subsequent fuel recovery in pine forests within the National...
Characterization of seepage in the exploratory studies facility, Yucca Mountain, Nevada
T.A. Oliver, J. F. Whelan
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Following a 5-month period of above-average precipitation during the winter of 2004-2005, water was observed seeping into the South Ramp section of the Exploratory Studies Facility of the proposed repository for high-level radioactive waste at Yucca Mountain, Nevada. Samples of the seepage were collected and analyzed for major ions, trace...
Data report: Permeabilities of eastern equatorial Pacific and Peru margin sediments
Kusali Gamage, Barbara A. Bekins, Elizabeth Screaton
Bo B. Jorgensen, Steven L. D’Hondt, D. Jay Miller, editor(s)
2006, Proceedings of the Ocean Drilling Program: Scientific Results 201-18
Constant-flow permeability tests were conducted on core samples from Ocean Drilling Program Leg 201 from the eastern equatorial Pacific and the Peru margin. Eighteen whole-round core samples from Sites 1225, 1226, 1227, 1230, and 1231 were tested for vertical permeabilities. Sites 1225, 1226, and 1231 represent sediments of the open...
Airport geomagnetic surveys in the United States
A. Berarducci
2006, NATO Security through Science Series C: Environmental Security 247-258
The Federal Aviation Administration (FAA) and the United States military have requirements for design, location, and construction of compass calibration pads (compass roses), these having been developed through collaboration with US Geological Survey (USGS) personnel. These requirements are detailed in the FAA Advisory Circular AC 150/5300-13, Appendix 4, and in...
Virulence comparisons of infectious hematopoietic necrosis virus U and M genogroups in sockeye salmon and rainbow trout
K.A. Garver, W.N. Batts, Gael Kurath
2006, Journal of Aquatic Animal Health (18) 232-243
Infectious hematopoietic necrosis virus (IHNV) is an aquatic rhabdovirus that infects salmonids in the Pacific Northwest of the United States, Europe, and Asia. Isolates of IHNV have been phylogenetically classified into three major viral genogroups, designated U, M, and L. To characterize virulence of IHNV in the context of these...
Mercury methylation influenced by areas of past mercury mining in the Terlingua district, Southwest Texas, USA
J. E. Gray, M.E. Hines, H. Biester
2006, Applied Geochemistry (21) 1940-1954
Speciation and microbial transformation of Hg was studied in mine waste from abandoned Hg mines in SW Texas to evaluate the potential for methyl-Hg production and degradation in mine wastes. In mine waste samples, total Hg, ionic Hg2+, Hg0, methyl-Hg, organic C, and total S concentrations were measured, various Hg...
Factors influencing nest success of songbirds in aspen and willow riparian areas in the Great Basin
J.M. Heltzel, S.L. Earnst
2006, Condor (108) 842-855
Recent studies have examined the effects of livestock grazing, agriculture, and human habitation on nest predation and brood parasitism in riparian areas in the western United States. However, we know little about factors influencing nest success in riparian areas lacking such anthropogenic influences, in part because the influences are so...
Light-mediated Zn uptake in photosynthetic biofilm
J.M. Morris, A.M. Farag, D. A. Nimick, J.S. Meyer
2006, Hydrobiologia (571) 361-371
Our experiments conducted under controlled laboratory conditions demonstrate diel uptake and release of zinc (Zn) in lab-cultured biofilm exposed to Zn concentrations that are present in some mining-impacted streams (1–2 mg Zn/l). Specifically, at constant pH, temperature, and aqueous Zn concentrations in the exposure water, biofilm accumulated Zn during the light...
The use of artificial impoundments by two amphibian species in the Delaware Water Gap National Recreation Area
J.T. Julian, C.D. Snyder, J.A. Young
2006, Northeastern Naturalist (13) 459-468
We compared breeding activity of Ambystoma maculatum (Spotted Salamander) and Rana sylvatica (Wood Frog) in artificial impoundments to patterns in natural wetlands over a three-year period in the Delaware Water Gap National Recreation Area. Rana sylvatica were 5.6 times more likely to use natural bodies of water for breeding than...
Texture analysis for automated classification of geologic structures
V. Shankar, J.J. Rodriguez, M. E. Gettings
2006, Conference Paper, Proceedings of the IEEE Southwest Symposium on Image Analysis and Interpretation
Texture present in aeromagnetic anomaly images offers an abundance of useful geological information for discriminating between rock types, but current analysis of such images still relies on tedious, human interpretation. This study is believed to be the first effort to quantitatively assess the performance of texture-based digital image analysis for...
Lake sturgeon spawning on artificial habitat in the St Lawrence River
J. H. Johnson, S. R. LaPan, R.M. Klindt, A. Schiavone
2006, Journal of Applied Ichthyology (22) 465-470
In 1996, lake sturgeon (Acipenser fulvescens) spawning was documented for the third consecutive year on an artificially placed gravel bed in the St Lawrence River. Two distinct spawning periods were observed in 1996. Spawning initially commenced on 17 June, when water temperature reached 15°C. A second spawning event was documented...
Does body size affect a bird's sensitivity to patch size and landscape structure?
Maiken Winter, Douglas H. Johnson, Jill A. Shaffer
2006, Condor (108) 808-816
Larger birds are generally more strongly affected by habitat loss and fragmentation than are smaller ones because they require more resources and thus larger habitat patches. Consequently, conservation actions often favor the creation or protection of larger over smaller patches. However, in grassland systems the boundaries between a patch and...
Integration of the stratigraphic aspects of very large sea-floor databases using information processing
Clinton N. Jenkins, J. Flocks, M. Kulp
Rothwell R.G., editor(s)
2006, Geological Society Special Publication 229-240
Information-processing methods are described that integrate the stratigraphic aspects of large and diverse collections of sea-floor sample data. They efficiently convert common types of sea-floor data into database and GIS (geographical information system) tables, visual core logs, stratigraphic fence diagrams and sophisticated stratigraphic statistics. The input data are held in...
Absolute calibration accuracy of L4 TM and L5 TM sensor image pairs
G. Chander, E. Micijevic
2006, Conference Paper, Proceedings of SPIE - The International Society for Optical Engineering
The Landsat suite of satellites has collected the longest continuous archive of multispectral data of any land-observing space program. From the Landsat program's inception in 1972 to the present, the Earth science user community has benefited from a historical record of remotely sensed data. However, little attention has been paid...
Rupture propagation of the 2004 Parkfield, California, earthquake from observations at the UPSAR
Joe B. Fletcher, P. Spudich, L.M. Baker
2006, Bulletin of the Seismological Society of America (96)
Using a short-baseline seismic array (U.S. Geological Survey Parkfield Dense Seismograph Array [UPSAR]) about 12 km west of the rupture initiation of the 28 September 2004 M 6.0 Parkfield, California, earthquake, we have observed the movement of the rupture front of this earthquake on the San Andreas fault. The sources...
Addition of simultaneous heat and solute transport and variable fluid viscosity to SEAWAT
D. Thorne, C.D. Langevin, M.C. Sukop
2006, Computers & Geosciences (32) 1758-1768
SEAWAT is a finite-difference computer code designed to simulate coupled variable-density ground water flow and solute transport. This paper describes a new version of SEAWAT that adds the ability to simultaneously model energy and solute transport. This is necessary for simulating the transport of heat and salinity in coastal aquifers...
Prevalence of Microsporidia, Cryptosporidium spp., and Giardia spp. in beavers (Castor canadensis) in Massachusetts
R. Fayer, M. Santin, J.M. Trout, S. DeStefano, K. Koenen, T. Kaur
2006, Journal of Zoo and Wildlife Medicine (37) 492-497
Feces from 62 beavers (Castor canadensis) in Massachusetts were examined by fluorescence microscopy (IFA) and polymerase chain reaction (PCR) for Microsporidia species, Cryptosporidium spp., and Giardia spp. between January 2002 and December 2004. PCR-positive specimens were further examined by gene sequencing. Protist parasites were detected in 6.4% of the beavers....
