State summaries: Oklahoma
S.T. Krukowski
2006, Mining Engineering (58) 112
In 2005, Oklahoma mines produced both industrial minerals and coal. No metals were mined in the state. Based on value, leading industrial minerals include crushed stone followed by cement, construction sand and gravel, industrial sand and gravel, iodine and gypsum. The Oklahoma Department of Mines (ODOM) reported that more than...
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...
Coulomb stress transfer and tectonic loading preceding the 2002 Denali fault earthquake
Charles G. Bufe
2006, Bulletin of the Seismological Society of America (96) 1662-1674
Pre-2002 tectonic loading and Coulomb stress transfer are modeled along the rupture zone of the M 7.9 Denali fault earthquake (DFE) and on adjacent segments of the right-lateral Denali–Totschunda fault system in central Alaska, using a three-dimensional boundary-element program. The segments modeled closely follow, for about 95°, the arc...
The importance of physiological ecology in conservation biology
C.R. Tracy, K.E. Nussear, T. C. Esque, K. Dean-Bradley, L.A. DeFalco, K.T. Castle, L.C. Zimmerman, R.E. Espinoza, A.M. Barber
2006, Conference Paper, Integrative and Comparative Biology
Many of the threats to the persistence of populations of sensitive species have physiological or pathological mechanisms, and those mechanisms are best understood through the inherently integrative discipline of physiological ecology. The desert tortoise was listed under the Endangered Species Act largely due to a newly recognized upper respiratory disease...
A plastic flow model for the Acquara - Vadoncello landslide in Senerchia, Southern Italy
W. Savage, J. Wasowski
2006, Engineering Geology (83) 4-21
A previously developed model for stress and velocity fields in two-dimensional Coulomb plastic materials under self-weight and pore pressure predicts that long, shallow landslides develop slip surfaces that manifest themselves as normal faults and normal fault scarps at the surface in areas of extending flow and as thrust faults and...
State summaries: Utah
R.L. Bon, K.A. Krahulec
2006, Mining Engineering (58) 116-122
The value of Utah's mineral production in 2005 was estimated to be a record $3.58 billion. This was $1.26 billion higher than the revised value of $2.32 billion for 2004. All major industry segments gained in value in 2005. In the value of nonfuel mineral production, Utah ranked fourth. The...
A productivity model for parasitized, multibrooded songbirds
L.A. Powell, M. G. Knutson
2006, Condor (108) 292-300
We present an enhancement of a simulation model to predict annual productivity for Wood Thrushes (Hylocichla mustelina) and American Redstarts (Setophaga ruticilla); the model includes effects of Brown-headed Cowbird (Molothrus ater) parasitism. We used species-specific data from the Driftless Area Ecoregion of Wisconsin, Minnesota, and Iowa to parameterize the model...
Great earthquakes of variable magnitude at the Cascadia subduction zone
A.R. Nelson, H.M. Kelsey, Robert C. Witter
2006, Quaternary Research (65) 354-365
Comparison of histories of great earthquakes and accompanying tsunamis at eight coastal sites suggests plate-boundary ruptures of varying length, implying great earthquakes of variable magnitude at the Cascadia subduction zone. Inference of rupture length relies on degree of overlap on radiocarbon age ranges for earthquakes and tsunamis, and relative amounts...
Recharge processes drive sulfate reduction in an alluvial aquifer contaminated with landfill leachate
M. A. Scholl, I.M. Cozzarelli, S. C. Christenson
2006, Journal of Contaminant Hydrology (86) 239-261
Natural attenuation of contaminants in groundwater depends on an adequate supply of electron acceptors to stimulate biodegradation. In an alluvial aquifer contaminated with leachate from an unlined municipal landfill, the mechanism of recharge infiltration was investigated as a source of electron acceptors. Water samples were collected monthly at closely spaced intervals...
Characteristics of a ringtail (Bassariscus astutus) population in Trans Pecos, Texas
B.K. Ackerson, L.A. Harveson
2006, Texas Journal of Science (58) 169-184
Despite the common occurrence of ringtails (Bassariscus astutus) few studies have been conducted to assess population characteristics. The objectives of this study were to determine (1) habitat selection, (2) home range, (3) denning characteristics, and (4) food habits of ringtails in the Trans Pecos region of west Texas. Seventeen ringtails...
The Amphibian Research and Monitoring Initiative (ARMI): 5-year report
Erin Muths, Alisa L. Gallant, Evan H. Campbell Grant, William A. Battaglin, David E. Green, Jennifer S. Staiger, Susan C. Walls, Margaret S. Gunzburger, Rick F. Kearney
2006, Scientific Investigations Report 2006-5224
The Amphibian Research and Monitoring Initiative (ARMI) is an innovative, multidisciplinary program that began in 2000 in response to a congressional directive for the Department of the Interior to address the issue of amphibian declines in the United States. ARMI’s formulation was cross-disciplinary, integrating U.S. Geological Survey scientists from Biology,...
Surveillance for Asian H5N1 avian influenza in the United States
S. Ip, Paul G. Slota
2006, Fact Sheet 2006-3025
Increasing concern over the potential for migratory birds to introduce the Asian H5N1 strain of avian influenza to North America prompted the White House Policy Coordinating Committee for Pandemic Influenza Preparedness to request that the U.S. Departments of Agriculture (USDA) and Interior (DOI) develop a plan for the early detection...
Flood pattern and weather determine Populus leaf litter breakdown and nitrogen dynamics on a cold desert floodplain
D.C. Andersen, S. M. Nelson
2006, Journal of Arid Environments (64) 626-650
Patterns and processes involved in litter breakdown on desert river floodplains are not well understood. We used leafpacks containing Fremont cottonwood (Populus deltoides subsp. wislizenii) leaf litter to investigate the roles of weather and microclimate, flooding (immersion), and macroinvertebrates on litter organic matter (OM) and nitrogen (N) loss on a...
"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...
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...
Hindcasting nitrogen deposition to determine an ecological critical load
Jill Baron
2006, Ecological Applications (16) 433-439
Using an estimated background nitrogen (N) deposition value of 0.5 kg N·ha−1·yr−1 in 1900, and a 19-year record of measured values from Loch Vale (Colorado, USA; NADP site CO98), I reconstructed an N-deposition history using exponential equations that correlated well with EPA-reported NOx emissions from Colorado and from the sum...
Novel ecosystems: Theoretical and management aspects of the new ecological world order
R.J. Hobbs, S. Arico, J. Aronson, Jill Baron, P. Bridgewater, V.A. Cramer, P.R. Epstein, J.J. Ewel, C.A. Klink, A.E. Lugo, D. Norton, D. Ojima, D.M. Richardson, E.W. Sanderson, F. Valladares, M. Vila, R. Zamora, M. Zobel
2006, Global Ecology and Biogeography (15) 1-7
We explore the issues relevant to those types of ecosystems containing new combinations of species that arise through human action, environmental change, and the impacts of the deliberate and inadvertent introduction of species from other regions. Novel ecosystems (also termed ‘emerging ecosystems’) result when species occur in combinations and relative...
A permutation test for quantile regression
Brian S. Cade, Jon D. Richards
2006, Journal of Agricultural, Biological, and Environmental Statistics (11) 106-126
A drop in dispersion, F-ratio like, permutation test (D) for linear quantile regression estimates (0≤τ≤1) had relative power ≥1 compared to quantile rank score tests (T) for hypotheses on parameters other than the intercept. Power was compared for combinations of sample sizes (<i class="EmphasisTypeItalic...
Forest reproduction along a climatic gradient in the Sierra Nevada, California
Phillip J. van Mantgem, Nathan L. Stephenson, Jon E. Keeley
2006, Forest Ecology and Management (225) 391-399
To elucidate broad-scale environmental controls of coniferous forest reproduction in the Sierra Nevada, California, we monitored reproduction for 5 years in 47 plots arrayed across a steep elevational (climatic) gradient. We found that both absolute seedling densities (stems < 1.37 m) and seedling densities relative to overstory parent tree basal area declined sharply...
Distribution of recent volcanism and the morphology of seamounts and ridges in the GLIMPSE study area: Implications for the lithospheric cracking hypothesis for the origin of intraplate, non-hot spot volcanic chains
D.W. Forsyth, N. Harmon, D.S. Scheirer, R.A. Duncan
2006, Journal of Geophysical Research B: Solid Earth (111)
Lithospheric cracking by remotely applied stresses or thermoelastic stresses has been suggested to be the mechanism responsible for the formation of intraplate volcanic ridges in the Pacific that clearly do not form above fixed hot spots. As part of the Gravity Lineations Intraplate Melting Petrology and Seismic Expedition (GLIMPSE) project...
Integrating field research, modeling and remote sensing to quantify morphodynamics in a high-energy coastal setting, ocean beach, San Francisco, California
P.L. Barnard, D.M. Hanes
2006, Conference Paper, Coastal Dynamics 2005 - Proceedings of the Fifth Coastal Dynamics International Conference
Wave and coastal circulation modeling are combined with multibeam bathymetry, high-resolution beach surveys, cross-shore Personal Water Craft surveys, digital bed sediment camera surveys, and real-time video monitoring to quantify morphological change and nearshore processes at Ocean Beach, San Francisco. Initial SWAN (Simulating Waves Nearshore) wave modeling results show a focusing...
Lithostratigraphy and shear-wave velocity in the crystallized Topopah Spring Tuff, Yucca Mountain, Nevada
D.C. Buesch, K.H. Stokoe II, K.C. Won, Y.J. Seong, J.L. Jung, M.D. Schuhen
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Evaluation of the potential future response to seismic events of the proposed spent nuclear fuel and high-level radioactive waste repository at Yucca Mountain, Nevada, is in part based on the seismic properties of the host rock, the 12.8-million-year-old Topopah Spring Tuff. Because of the processes that formed the tuff, the...
Magnesium content within the skeletal architecture of the coral Montastraea faveolata: locations of brucite precipitation and implications to fine-scale data fluctuations
N.A. Buster, C. W. Holmes
2006, Coral Reefs (25) 243-253
Small portions of coral cores were analyzed using a high-resolution laser ablation inductively coupled plasma mass spectrometer (LA ICP-MS) to determine the geochemical signatures within and among specific skeletal structures in the large framework coral, Montastraea faveolata. Vertical transects were sampled along three parallel skeletal structures: endothecal (septal flank), corallite...
Early mortality syndrome in coho salmon (Oncorhynchus kisutch) and Chinook salmon (O. tshawytscha) in the Great Lakes
Diane G. Elliott
D.W. Bruno, D.G. Elliott, B. Nowak, editor(s)
2006, Conference Paper, EAFP 2005 Copenhagen Histopathology Workshop. Reproductive pathology and early life stages pathology: Notes and images.
No abstract available....
Relative importance of magnetic moments in UXO clearance applications
V. Sanchez, Y. Li, M. Nabighian, D. Wright
2006, SEG Technical Program Expanded Abstracts (25) 1381-1385
Surface magnetic anomaly observed in UXO clearance is mainly dipolar and, as a result, the dipole is the only moment used regularly in UXO applications. The dipole moment contains intensity of magnetization information but lacks shape information. Unlike dipole, higher-order moments, such as quadrupole and octupole, encode asymmetry properties of...
