Diagnostic criteria for proliferative hepatic lesions in brown bullhead Ameiurus nebulosus
V. S. Blazer, J.W. Fournie, J.C. Wolf, M.J. Wolfe
2006, Diseases of Aquatic Organisms (72) 19-30
Brown bullhead Ameiurus nebulosus is used as indicator species for contaminant effects at areas of concern (AOC) in the Great Lakes and other areas. One of the beneficial use impairments at numerous AOC is 'fish tumors and other deformities'. An impairment occurs when the prevalence of fish tumors and other...
Environmental contaminants and biomarker responses in fish from the Columbia River and its tributaries: spatial and temporal trends
J.E. Hinck, C. J. Schmitt, V. S. Blazer, N. D. Denslow, T.M. Bartish, P.J. Anderson, J.J. Coyle, G.M. Dethloff, D. E. Tillitt
2006, Science of the Total Environment (366) 549-578
Fish were collected from 16 sites on rivers in the Columbia River Basin (CRB) from September 1997 to April 1998 to document temporal and spatial trends in the concentrations of accumulative contaminants and to assess contaminant effects on the fish. Sites were located on the mainstem of the Columbia River...
Evaluating uncertainty in predicting spatially variable representative elementary scales in fractured aquifers, with application to Turkey Creek Basin, Colorado
Tristan P. Wellman, Eileen P. Poeter
2006, Water Resources Research (42)
Computational limitations and sparse field data often mandate use of continuum representation for modeling hydrologic processes in large‐scale fractured aquifers. Selecting appropriate element size is of primary importance because continuum approximation is not valid for all scales. The traditional approach is to select elements by identifying a single representative elementary...
Effects of tributary debris on the longitudinal profile of the Colorado River in Grand Canyon
Thomas C. Hanks, R. H. Webb
2006, Journal of Geophysical Research F: Earth Surface (111)
The Colorado River in Grand Canyon has long been known as a "rapids-and-pools" river, with the rapids owing their existence primarily to tributary debris flows. The debris flows deposit subaerial debris fans that constrict the channel laterally and, when they enter the river, raise the bed elevation. The rapids are...
Petrology and chemistry of Permian coals from the Paraná Basin: 1. Santa Terezinha, Leão-Butiá and Candiota Coalfields, Rio Grande do Sul, Brazil
W. Kalkreuth, M. Holz, M. Kern, G. Machado, A. Mexias, M.B. Silva, J. Willett, R. Finkelman, H. Burger
2006, International Journal of Coal Geology (68) 79-116
The current paper presents results on petrological and geochemical coal seam characterization in Permian coal-bearing strata from the Paraná Basin, southern Brazil. Sequence stratigraphic analysis shows that peat accumulation in Permian time was closely linked to transgressive/regressive cycles, with peat accumulation occurring in a predominantly back barrier/lagoonal setting. Coal...
Earthquake and volcano clustering via stress transfer at Yucca Mountain, Nevada
T. Parsons, G. A. Thompson, A.H. Cogbill
2006, Geology (34) 785-788
The proposed national high-level nuclear waste repository at Yucca Mountain is close to Quaternary cinder cones and faults with Quaternary slip. Volcano eruption and earthquake frequencies are low, with indications of spatial and temporal clustering, making probabilistic assessments difficult. In an effort to identify the most likely intrusion sites, we...
Derivation of planetary topography using multi-image shape-from-shading
Volker Lohse, Christian Heipke, Randolph L. Kirk
2006, Planetary and Space Science (54) 661-674
In many cases, the derivation of high-resolution digital terrain models (DTMs) from planetary surfaces using conventional digital image matching is a problem. The matching methods need at least one stereo pair of images with sufficient texture. However, many space missions provide only a few stereo images and planetary surfaces often...
Perspectives on basaltic magma crystallization and differentiation: Lava-lake blocks erupted at Mauna Loa volcano summit, Hawaii
Renee L. McCarter, R.V. Fodor, Frank A. Trusdell
2006, LITHOS (90) 187-213
Explosive eruptions at Mauna Loa summit ejected coarse-grained blocks (free of lava coatings) from Moku'aweoweo caldera. Most are gabbronorites and gabbros that have 0–26 vol.% olivine and 1–29 vol.% oikocrystic orthopyroxene. Some blocks are ferrogabbros and diorites with micrographic matrices, and diorite veins (≤2 cm) cross-cut some gabbronorites and gabbros. One block...
Platinum-group element, Gold, Silver and Base Metal distribution in compositionally zoned sulfide droplets from the Medvezky Creek Mine, Noril'sk, Russia
S.-J. Barnes, R.A. Cox, M. L. Zientek
2006, Contributions to Mineralogy and Petrology (152) 187-200
Concentrations of Ag, Au, Cd, Co, Re, Zn and Platinum-group elements (PGE) have been determined in sulfide minerals from zoned sulfide droplets of the Noril'sk 1 Medvezky Creek Mine. The aims of the study were; to establish whether these elements are located in the major sulfide minerals (pentlandite, pyrrhotite, chalcopyrite...
Landslides caused by the M 7.6 Tecomán, Mexico earthquake of January 21, 2003
David K. Keefer, Joseph Wartman, Ochoa C. Navarro, Adrian Rodriguez-Marek, Gerald F. Wieczorek
2006, Engineering Geology (86) 183-197
The Tecomán, Mexico earthquake (also called the “Colima earthquake”) of January 21, 2003 (M 7.6) triggered several hundreds of landslides in the coastal cordilleras of Colima State, near the earthquake source, and several thousands in the volcanic highlands north and northwest of Colima City. These landslides, mostly shallow and...
Comparison of selenium bioaccumulation in the clams Corbicula fluminea and Potamocorbula amurensis: A bioenergetic modeling approach
B.-G. Lee, J.-S. Lee, S. N. Luoma
2006, Environmental Toxicology and Chemistry (25) 1933-1940
Selenium uptake from food (assimilation efficiency) and dissolved phase (influx rate) as well as loss kinetics (efflux rate) were compared between two bivalves, Corbicula fluminea and Potamocorbula amurensis. The effects of salinity and temperature on these kinetic parameters for both clam species also were evaluated. The Asiatic clam, C. fluminea,...
Pharmaceuticals and other organic chemicals in selected north-central and northwestern Arkansas streams
B. E. Haggard, J.M. Galloway, W. R. Green, M. T. Meyer
2006, Journal of Environmental Quality (35) 1078-1087
Recently, our attention has focused on the low level detection of many antibiotics, pharmaceuticals, and other organic chemicals in water resources. The limited studies available suggest that urban or rural streams receiving wastewater effluent are more susceptible to contamination. The purpose of this study was to evaluate the occurrence of...
Alpine plant community trends on the elk summer range of Rocky Mountain National Park, Colorado: An analysis of existing data
Linda Zeigenfuss
2006, Open-File Report 2006-1122
The majority of the elk (Cervus elaphus) population of Rocky Mountain National Park in Colorado summer in the park’s high-elevation alpine and subalpine meadows and willow krummholz. The park’s population of white-tailed ptarmigan (Lagopus leucurus altipetens) depends on both dwarf and krummholz willows for food and cover. Concern about the...
Disease emergence and resurgence—the wildlife-human connection
Milton Friend, James W. Hurley, Pauline Nol, Katherine E. Wesenberg
2006, Circular 1285
In 2000, the Global Outbreak Alert and Response Network (GOARN) was organized as a global disease watchdog group to coordinate disease outbreak information and health crisis response. The World Health Organization (WHO) is the headquarters for this network. Understandably, the primary focus for WHO is human health. However, diseases such...
USGS National Wildlife Health Center's Quarterly Wildlife Mortality Report
K. A. Converse, R. Sohn, G. McLaughlin
2006, Supplement to the Journal of Wildlife Diseases (42)
Evaluation of evidence supporting the effectiveness of desert tortoise recovery actions
William I. Boarman, William B. Kristan
2006, Scientific Investigations Report 2006-5143
As a federally threatened species, the desert tortoise's (Gopherus agassizii) recovery is required under the Endangered Species Act (ESA). According to the criteria established by the Desert Tortoise Recovery Plan (U.S. Fish and Wildlife Service 1994) for delisting the tortoise from ESA protection, the species as a whole will be considered...
Modeling post-fledging survival of lark buntings in response to ecological and biological factors
A. A. Yackel Adams, S. K. Skagen, J. A. Savidge
2006, Ecology (87) 178-188
We evaluated the influences of several ecological, biological, and methodological factors on post-fledging survival of a shortgrass prairie bird, the Lark Bunting (Calamospiza melanocorys). We estimated daily post-fledging survival (n = 206, 82 broods) using radiotelemetry and color bands to track fledglings. Daily survival probabilities were best explained by...
"HIP" new software: The Hydroecological Integrity Assessment Process
Jim Henriksen, Juliette T. Wilson
2006, Fact Sheet 2006-3088
Managing rivers and streams to maintain healthy aquatic ecosystems is a challenge for resource managers across the country. Demand for competing uses of water resources grows with escalating development, increasing recreational use, and the vagaries of climate and weather. For many species of concern, instream flow and associated water quality...
Ecology of bonytail and razorback sucker and the role of off-channel habitats in their recovery
Gordon A. Mueller
2006, Scientific Investigations Report 2006-5065
The bonytail and razorback sucker are two of four endangered mainstem fishes found in the Colorado River. Unlike the Colorado pikeminnow and humpback chub, wild populations of the bonytail and razorback sucker are either extirpated from the mainstem river or are nearly so. Agencies are aggressively stocking these fish and...
The Conservation Reserve Program: Planting for the future
Skip Hyberg, Arthur Allen
2006, Fact Sheet 2006-3078
Proceedings are now available from a scientific and technical forum held to review ongoing and planned research, identify lessons learned, and determine future research needs for the purpose of developing a rigorous scientific basis for future CRP policy discussions....
Defining ecosystem flow requirements for the Bill Williams River, Arizona
Patrick B. Shafroth, Vanessa B. Beauchamp, editor(s)
2006, Open-File Report 2006-1314
Alteration of natural river flows resulting from the construction and operation of dams can result in substantial changes to downstream aquatic and bottomland ecosystems and undermine the long-term health of native species and communities (for general review, cf. Ward and Stanford, 1995; Baron and others, 2002; Nilsson and Svedmark, 2002)....
Structure of the San Andreas fault zone at SAFOD from a seismic refraction survey
J.A. Hole, T. Ryberg, G. S. Fuis, F. Bleibinhaus, A.K. Sharma
2006, Geophysical Research Letters (33)
Refraction traveltimes from a 46-km long seismic survey across the San Andreas Fault were inverted to obtain two-dimensional velocity structure of the upper crust near the SAFOD drilling project. The model contains strong vertical and lateral velocity variations from <2 km/s to ???6 km/s. The Salinian terrane west of the...
Polychlorinated biphenyls, mercury, and potential endocrine disruption in fish from the Hudson River, New York, USA
Barry P. Baldigo, R.J. Sloan, S.B. Smith, N. D. Denslow, V. S. Blazer, T. S. Gross
2006, Aquatic Sciences (68) 206-228
Tissue residues of total mercury (Hg), total polychlorinated biphenyls (PCBs), and lipid-based PCBs; plasma concentrations of endocrine biomarkers; and reproductive and histologic biomarkers were assessed in 460 carp (Cyprinus carpio), bass (Micropterus salmoides and Micropterus dolomieui), and bullhead (Ameiurus nebulosus) collected from eight sites across the Hudson River Basin in...
Daily energy expenditure in free-ranging Gopher Tortoises (Gopherus polyphemus)
P.G.R. Jodice, D.M. Epperson, G. Henk Visser
2006, Copeia 129-136
Studies of ecological energetics in chelonians are rare. Here, we report the first measurements of daily energy expenditure (DEE) and water influx rates (WIRs) in free-ranging adult Gopher Tortoises (Gopherus polyphemus). We used the doubly labeled water (DLW) method to measure DEE in six adult tortoises during the non-breeding season...
Diatomite
A. Founie
2006, Mining Engineering (58) 28
In 2005, diatomite production in the United States reached 653 kt, a 5% increased over 2004. Production came from six companies with 12 processing facilities in four states. California and Nevada accounted for 70% of US production in 2005. Other than the United States, significant producers included China, Denmark, Japan,...
