Relationship between shrubs and foods in mountain plover habitat in Park County, Colorado
S.C. Schneider, Michael B. Wunder, F.L. Knopf
2006, Southwestern Naturalist (51) 197-202
We explored habitat use in terms of vegetation structure and potential forage availability for mountain plovers (Charadrius montanus) in Park County, Colorado. We quantified the percentage cover of bare ground, percentage cover of shrubs (Chrysothamnus visadiflorus), linear distance to nearest shrub, arthropod biomass, and grasshopper density for 102 plots of...
Passage behavior of radio-tagged subyearling Chinook salmon at Bonneville Dam, 2005
R.E. Reagan, M.J. Farley, S.D. Evans, L.S Wright, N.S. Adams, D.W. Rondorf
2006, Report
No abstract available ...
Survival estimates of migrant juvenile salmonids through The Dalles Dam using radio telemetry, 2005
T. Counihan, A. Puls, C. Walker, G. Holmberg
2006, Report
No abstract available ...
Assess current and potential salmonid production in Rattlesnake Creek associated with restoration efforts
M.B. Allen, P.J. Connolly
2006, Report
No abstract available ...
Crims Island habitat restoration in the Columbia River estuary-fisheries monitoring and evaluation, 2004
C. A. Haskell, K.F. Tiffan, R.C. Koch, D.W. Rondorf
2006, Report
No abstract available ...
Stochastic uncertainty analysis for unconfined flow systems
Gaisheng Liu, Dongxiao Zhang, Zhiming Lu
2006, Water Resources Research (42)
A new stochastic approach proposed by Zhang and Lu (2004), called the Karhunen‐Loeve decomposition‐based moment equation (KLME), has been extended to solving nonlinear, unconfined flow problems in randomly heterogeneous aquifers. This approach is on the basis of an innovative combination of Karhunen‐Loeve decomposition, polynomial expansion, and perturbation methods. The random...
Evidence for a polar ethane cloud on Titan
C.A. Griffith, P. Penteado, P. Rannou, R. Brown, V. Boudon, K. H. Baines, R. Clark, P. Drossart, B. Buratti, P. Nicholson, C.P. McKay, A. Coustenis, A. Negrao, R. Jaumann
2006, Science (313) 1620-1622
Spectra from Cassini's Visual and Infrared Mapping Spectrometer reveal the presence of a vast tropospheric cloud on Titan at latitudes 51?? to 68?? north and all longitudes observed (10?? to 190?? west). The derived characteristics indicate that this cloud is composed of ethane and forms as a result of stratospheric...
Assessment of pesticide residues in army cutworm moths (Euxoa auxiliaris) from the Greater Yellowstone Ecosystem and their potential consequences to foraging grizzly bears (Ursus arctos horribilis)
H. L. Robison, Charles C. Schwartz, J. D. Petty, P. F. Brussard
2006, Chemosphere (64) 1704-1712
During summer, a grizzly bear (Ursus arctos horribilis) in the Greater Yellowstone Ecosystem (GYE) (USA) can excavate and consume millions of army cutworm moths (Euxoa auxiliaris) (ACMs) that aggregate in high elevation talus. Grizzly bears in the GYE were listed as threatened by the US Fish and Wildlife Service in...
Resource availability controls fungal diversity across a plant diversity gradient
M. P. Waldrop, D.R. Zak, C.B. Blackwood, C.D. Curtis, D. Tilman
2006, Ecology Letters (9) 1127-1135
Despite decades of research, the ecological determinants of microbial diversity remain poorly understood. Here, we test two alternative hypotheses concerning the factors regulating fungal diversity in soil. The first states that higher levels of plant detritus production increase the supply of limiting resources (i.e. organic substrates) thereby increasing fungal diversity....
The effect of calcium on aqueous uranium(VI) speciation and adsorption to ferrihydrite and quartz
P.M. Fox, J.A. Davis, J.M. Zachara
2006, Geochimica et Cosmochimica Acta (70) 1379-1387
Recent studies of uranium(VI) geochemistry have focused on the potentially important role of the aqueous species, CaUO2(CO3)32− and Ca2UO2(CO3)30(aq), on inhibition of microbial reduction and uranium(VI) aqueous speciation in contaminated groundwater. However, to our knowledge, there have been no direct studies of the effects...
Educating veterinarians for careers in free-ranging wildlife medicine and ecosystem health
J.A.K. Mazet, G.E. Hamilton, L.A. Dierauf
2006, Journal of Veterinary Medical Education (33) 352-360
In the last 10 years, the field of zoological medicine has seen an expansive broadening into the arenas of free-ranging wildlife, conservation medicine, and ecosystem health. During the spring/summer of 2005, we prepared and disseminated a survey designed to identify training and educational needs for individuals entering the wildlife medicine...
An assessment of bird habitat quality using population growth rates
M. G. Knutson, L.A. Powell, R. K. Hines, M. A. Friberg, G.J. Niemi
2006, Condor (108) 301-314
Survival and reproduction directly affect population growth rate (lambda) making lambda a fundamental parameter for assessing habitat quality. We used field data, literature review, and a computer simulation to predict annual productivity and lambda for several species of landbirds breeding in floodplain and upland forests in the Midwestern United States....
Atmospheric deposition of current-use and historic-use pesticides in snow at National Parks in the Western United States
K.J. Hageman, S.L. Simonich, K. Campbell, G.R. Wilson, D.H. Landers
2006, Environmental Science & Technology (40) 3174-3180
The United States (U.S.) National Park Service has initiated research on the atmospheric deposition and fate of semi-volatile organic compounds in its alpine, sub-Arctic, and Arctic ecosystems in the Western U.S. Results for the analysis of pesticides in seasonal snowpack samples collected in spring 2003 from seven national parks are...
Population structure, persistence, and seasonality of autochthonous Escherichia coli in temperate, coastal forest soil from a Great Lakes watershed
M.N. Byappanahalli, R.L. Whitman, D.A. Shively, M.J. Sadowsky, S. Ishii
2006, Environmental Microbiology (8) 504-513
The common occurrence of Escherichia coli in temperate soils has previously been reported, however, there are few studies to date to characterize its source, distribution, persistent capability and genetic diversity. In this study, undisturbed, forest soils within six randomly selected 0.5 m2 exclosure plots (covered by netting of 2.3 mm2...
Increases in desert shrub productivity under elevated carbon dioxide vary with water availability
D.C. Housman, E. Naumburg, T. E. Huxman, T.N. Charlet, R.S. Nowak, S.D. Smith
2006, Ecosystems (9) 374-385
Productivity of aridland plants is predicted to increase substantially with rising atmospheric carbon dioxide (CO2) concentrations due to enhancement in plant water-use efficiency (WUE). However, to date, there are few detailed analyses of how intact desert vegetation responds to elevated CO2. From 1998 to 2001, we examined aboveground production, photosynthesis,...
Gemstones
D.W. Olson
2006, Mining Engineering (58) 31-32
During 2005, the estimated value of natural gemstones produced from US deposits was $13.9 million. Production included agates, amber, beryl, coral, garnet, jade, jasper, opal, pearl, quartz, sapphire, shell, topaz, tourmaline, and torquoise among others. For the year, the US gemstone trade with all countries and territories exceeded $26 billion....
Early Cretaceous terrestrial ecosystems in East Asia based on food-web and energy-flow models
M. Matsukawa, K. Saiki, M. Ito, I. Obata, D. J. Nichols, M.G. Lockley, R. Kukihara, K. Shibata
2006, Cretaceous Research (27) 285-307
In recent years, there has been global interest in the environments and ecosystems around the world. It is helpful to reconstruct past environments and ecosystems to help understand them in the present and the future. The present environments and ecosystems are an evolving continuum with those of the past and...
Late Pleistocene outburst flooding from pluvial Lake Alvord into the Owyhee River, Oregon
D.T. Carter, L.L. Ely, J. E. O’Connor, C.R. Fenton
2006, Geomorphology (75) 346-367
At least one large, late Pleistocene flood traveled into the Owyhee River as a result of a rise and subsequent outburst from pluvial Lake Alvord in southeastern Oregon. Lake Alvord breached Big Sand Gap in its eastern rim after reaching an elevation of 1292 m, releasing 11.3 km3 of water...
Beyond the obvious limits of ore deposits: The use of mineralogical, geochemical, and biological features for the remote detection of mineralization
D. L. Kelley, K.D. Kelley, W.B. Coker, B. Caughlin, M.E. Doherty
2006, Economic Geology (101) 729-752
Far field features of ore deposits include mineralogical, geochemical, or biological attributes that can be recognized beyond the obvious limits of the deposits. They can be primary, if formed in association with mineralization or alteration processes, or secondary, if formed from the interaction of ore deposits with the hydrosphere and...
Glacial Lake Musselshell: Late Wisconsin slackwater on the Laurentide ice margin in central Montana, USA
N.K. Davis, W. W. Locke III, K. L. Pierce, R.C. Finkel
2006, Geomorphology (75) 330-345
Cosmogenic surface exposure ages of glacial boulders deposited in ice-marginal Lake Musselshell suggest that the lake existed between 20 and 11.5 ka during the Late Wisconsin glacial stage (MIS 2), rather than during the Late Illinoian stage (MIS 6) as traditionally thought. The altitude of the highest ice-rafted boulders and...
Geochemical constraints on the genesis of the Scheelite dome intrusion-related gold deposit, Tombstone gold belt, Yukon, Canada
J.L. Mair, R.J. Goldfarb, C. A. Johnson, C.J.R. Hart, E.E. Marsh
2006, Economic Geology (101) 523-553
The Scheelite dome intrusion-related gold deposit, western Selwyn basin, Yukon, is hosted in hornfelsed metasedimentary strata that lie adjacent to the exposed apices of a monzogranite to quartz monzonite plutonic complex of the mid-Cretaceous Tombstone-Tungsten magmatic belt, Tintina gold province, Alaska and Yukon. A variety of mineralization styles occur throughout...
Nitrogen
D.A. Kramer
2006, Mining Engineering (58) 45-46
In 2005, ammonia was produced by 15 companies at 26 plants in 16 states in the United States. Of the total ammonia production capacity, 55% was centered in Louisiana, Oklahoma and Texas because of their large reserves of natural gas. US producers operated at 66% of their rated capacity. In...
The 2005 La Conchita, California, landslide
R.W. Jibson
2006, Conference Paper, Landslides
[No abstract available]...
Effect of summer throughfall exclusion, summer drought, and winter snow cover on methane fluxes in a temperate forest soil
W. Borken, E.A. Davidson, K. Savage, E.T. Sundquist, P. Steudler
2006, Soil Biology and Biochemistry (38) 1388-1395
Soil moisture strongly controls the uptake of atmospheric methane by limiting the diffusion of methane into the soil, resulting in a negative correlation between soil moisture and methane uptake rates under most non-drought conditions. However, little is known about the effect of water stress on methane uptake in temperate forests...
Inverse modeling for seawater intrusion in coastal aquifers: Insights about parameter sensitivities, variances, correlations and estimation procedures derived from the Henry problem
E. Sanz, C.I. Voss
2006, Advances in Water Resources (29) 439-457
Inverse modeling studies employing data collected from the classic Henry seawater intrusion problem give insight into several important aspects of inverse modeling of seawater intrusion problems and effective measurement strategies for estimation of parameters for seawater intrusion. Despite the simplicity of the Henry problem, it embodies the behavior of a...
