Habitat and nesting biology of Mountain Plovers in Wyoming
R.E. Plumb, S.H. Anderson, F.L. Knopf
2005, Western North American Naturalist (65) 223-228
Although previous research has considered habitat associations and breeding biology of Mountain Plovers in Wyoming at discrete sites, no study has considered these attributes at a statewide scale. We located 55 Mountain Plover nests in 6 counties across Wyoming during 2002 and 2003. Nests occurred in 2 general habitat types:...
Reserve growth in oil fields of the North Sea
T. R. Klett, D. L. Gautier
2005, Petroleum Geoscience (11) 179-190
The assessment of petroleum resources of the North Sea, as well as other areas of the world, requires a viable means to forecast the amount of growth of reserve estimates (reserve growth) for discovered fields and to predict the potential fully developed sizes of undiscovered fields. This study investigates the...
Landscape resistance to frog movements
M. J. Mazerolle, A. Desrochers
2005, Canadian Journal of Zoology (83) 455-464
An animal's capacity to recolonize a patch depends on at least two components: its ability to detect the patch and its ability to reach it. However, the disruption of such processes by anthropic disturbances could explain low animal abundance patterns observed by many investigators in certain landscapes. Through field experiments,...
Centrarchid assemblages in Mississippi state-operated fishing lakes
J.A. Olive, L.E. Miranda, W.D. Hubbard
2005, North American Journal of Fisheries Management (25) 7-15
We evaluated electrofishing catch per effort in 27 state-operated fishing lakes in Mississippi to identify patterns of centrarchid community composition and to determine whether those patterns were related to selected environmental characteristics and to artificial nutrient enrichment. Ordination with detrended correspondence analysis recognized two major axes accounting for 77% of...
The calcite → aragonite transformation in low-Mg marble: Equilibrium relations, transformations mechanisms, and rates
Bradley R. Hacker, David C. Rubie, Stephen H. Kirby, Steven R. Bohlen
2005, Journal of Geophysical Research B: Solid Earth (110) 1-16
Experimental transformation of a rather pure natural calcite marble to aragonite marble did not proceed via the expected straightforward polymorphic replacement. Instead, the small amount of Mg in the starting material (0.36 wt %) was excluded from the growing aragonite and diffused preferentially into the remaining calcite grains, producing Mg-rich...
Investigating surface water-well interaction using stable isotope ratios of water
R. J. Hunt, T.B. Coplen, N.L. Haas, D. A. Saad, M. A. Borchardt
2005, Journal of Hydrology (302) 154-172
Because surface water can be a source of undesirable water quality in a drinking water well, an understanding of the amount of surface water and its travel time to the well is needed to assess a well's vulnerability. Stable <a title="Learn more about isotope ratios"...
Albedo of the south pole on Mars determined by topographic forcing of atmosphere dynamics
Anthony Colaprete, Jeffrey R. Barnes, Robert M. Haberle, Jeffery L. Hollingsworth, Hugh H. Kieffer, Timothy N. Titus
2005, Nature (435) 184-188
The nature of the martian south polar cap has remained enigmatic since the first spacecraft observations. In particular, the presence of a perennial carbon dioxide ice cap, the formation of a vast area of black ‘slab ice’ known as the Cryptic region and the asymmetric springtime retreat of the cap...
Seasonal to interannual morphodynamics along a high-energy dissipative littoral cell
P. Ruggiero, G. M. Kaminsky, G. Gelfenbaum, B. Voigt
2005, Journal of Coastal Research (21) 553-578
A beach morphology monitoring program was initiated during summer 1997 along the Columbia River littoral cell (CRLC) on the coasts of northwest Oregon and southwest Washington, USA. This field program documents the seasonal through interannual morphological variability of these high-energy dissipative beaches over a variety of spatial scales. Following the...
Behavior of a chlorinated ethene plume following source-area treatment with Fenton's reagent
F. H. Chapelle, P. M. Bradley, C.C. Casey
2005, Ground Water Monitoring and Remediation (25) 131-141
Monitoring data collected over a 6‐year period show that a plume of chlorinated ethene–contaminated ground water has contracted significantly following treatment of the contaminant source area using in situ oxidation. Prior to treatment (1998), concentrations of perchloroethene (PCE) exceeded 4500 μg/L in a contaminant source area associated with a municipal...
Magmatic effects of the Cobb hot spot on the Juan de Fuca Ridge
John Chadwick, M. Perfit, I. Ridley, I. Jonasson, G. Kamenov, W. Chadwick, R. Embley, Roux P. le, M. Smith
2005, Journal of Geophysical Research B: Solid Earth (110) 1-16
The interaction of the Juan de Fuca Ridge with the Cobb hot spot has had a considerable influence on the magmatism of the Axial Segment of the ridge, the second-order segment that overlies the hot spot. In addition to the construction of the large volcanic edifice of Axial Seamount, the...
Epidemiology of fractures in people with severe and profound developmental disabilities
N.R. Glick, M.H. Fischer, D.M. Heisey, G.E. Leverson, D.C. Mann
2005, Osteoporosis International (16) 389-396
Fractures are more prevalent among people with severe and profound developmental disabilities than in the general population. In order to characterize the tendency of these people to fracture, and to identify features that may guide the development of preventive strategies, we analyzed fracture epidemiology in people with severe and profound...
Voluminous granitic magmas from common basaltic sources
T. W. Sisson, K. Ratajeski, W.B. Hankins, A. F. Glazner
2005, Contributions to Mineralogy and Petrology (148) 635-661
Granitic-rhyolitic liquids were produced experimentally from moderately hydrous (1.7-2.3 wt% H2O) medium-to-high K basaltic compositions at 700 MPa and f O2 controlled from Ni-NiO -1.3 to +4. Amount and composition of evolved liquids and coexisting mineral assemblages vary with fO2 and temperature, with melt being more evolved at higher fO2s,...
Tropical cyclones and the flood hydrology of Puerto Rico
James A. Smith, Paula Sturdevant-Rees, Mary Lynn Baeck, Matthew C. Larsen
2005, Water Resources Research (41)
Some of the largest unit discharge flood peaks in the stream gaging records of the U.S. Geological Survey (USGS) have occurred in Puerto Rico. Many of these flood peaks are associated with tropical cyclones. Hurricane Georges, which passed directly over the island on 21–22 September 1998, produced record flood peaks...
Evidence for a global seismic-moment release sequence
C. G. Bufe, D. M. Perkins
2005, Bulletin of the Seismological Society of America (95) 833-843
Temporal clustering of the larger earthquakes (foreshock-mainshock-aftershock) followed by relative quiescence (stress shadow) are characteristic of seismic cycles along plate boundaries. A global seismic-moment release history, based on a little more than 100 years of instrumental earthquake data in an extended version of the catalog of Pacheco and Sykes (1992),...
Spatial and temporal variability of the overall error of National Atmospheric Deposition Program measurements determined by the USGS collocated-sampler program, water years 1989-2001
G.A. Wetherbee, N.E. Latysh, J.D. Gordon
2005, Conference Paper, Environmental Pollution
Data from the U.S. Geological Survey (USGS) collocated-sampler program for the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) are used to estimate the overall error of NADP/NTN measurements. Absolute errors are estimated by comparison of paired measurements from collocated instruments. Spatial and temporal differences in absolute error were identified and...
Aggression and feeding of hatchery-reared and naturally reared steelhead (Oncorhynchus mykiss) fry in a laboratory flume and a comparison with observations in natural streams
S.C. Riley, C.P. Tatara, J.A. Scheurer
2005, Canadian Journal of Fisheries and Aquatic Sciences (62) 1400-1409
We quantified the aggression and feeding of naturally reared steelhead (Oncorhynchus mykiss) fry stocked into a laboratory flume with naturally reared fry or hatchery-reared fry from conventional and enriched rearing environments at three densities in the presence and absence of predators, and compared the aggression and feeding observed in the...
Stable-isotope geochemistry of the Pierina high-sulfidation Au-Ag deposit, Peru: Influence of hydrodynamics on SO42--H2S sulfur isotopic exchange in magmatic-steam and steam-heated environments
R.H. Fifarek, R. O. Rye
2005, Chemical Geology (215) 253-279
The Pierina high-sulfidation Au-Ag deposit formed 14.5 my ago in rhyolite ash flow tuffs that overlie porphyritic andesite and dacite lavas and are adjacent to a crosscutting and interfingering dacite flow dome complex. The distribution of alteration zones indicates that fluid flow in the lavas was largely confined to structures...
Hypocenter locations in finite-source rupture models
P.M. Mai, P. Spudich, J. Boatwright
2005, Bulletin of the Seismological Society of America (95) 965-980
We use a database of more than 80 finite-source rupture models for more than 50 earthquakes (Mw, 4.1-8.1) with different faulting styles occurring in both tectonic and subduction environments to analyze the location of the hypocenter within the fault and to consider the correlation between hypocenter location and regions of...
Using chaotic forcing to detect damage in a structure
L. Moniz, J. Nichols, S. Trickey, M. Seaver, D. Pecora, L. Pecora
2005, Chaos (15)
In this work we develop a numerical test for Holder continuity and apply it and another test for continuity to the difficult problem of detecting damage in structures. We subject a thin metal plate with incremental damage to the plate changes, its filtering properties, and therefore the phase space trajectories...
Earthquake and ambient vibration monitoring of the steel-frame UCLA factor building
M.D. Kohler, P.M. Davis, E. Safak
2005, Earthquake Spectra (21) 715-736
Dynamic property measurements of the moment-resisting steel-frame University of California, Los Angeles, Factor building are being made to assess how forces are distributed over the building. Fourier amplitude spectra have been calculated from several intervals of ambient vibrations, a 24-hour period of strong winds, and from the 28 March 2003...
Slicing up the San Francisco Bay Area: Block kinematics and fault slip rates from GPS-derived surface velocities
M. A. d'Alessio, I.A. Johanson, R. Burgmann, D.A. Schmidt, M.H. Murray
2005, Journal of Geophysical Research B: Solid Earth (110) 1-19
Observations of surface deformation allow us to determine the kinematics of faults in the San Francisco Bay Area. We present the Bay Area velocity unification (BA??VU??, "bay view"), a compilation of over 200 horizontal surface velocities computed from campaign-style and continuous Global Positioning System (GPS) observations from 1993 to 2003....
A thousand years in the life of a landscape
Craig D. Allen
Robert P. Powers, editor(s)
2005, Book chapter, The peopling of Bandelier: New approaches to the archeology of the Pajarito Plateau
No abstract available....
Rapid differentiation of refined fuels using negative electrospray ionization/mass spectrometry
C.E. Rostad, F. D. Hostettler
2005, Conference Paper, American Chemical Society, Division of Petroleum Chemistry, Preprints
An application of electrospray ionization/mass spectrometry for identification of various commercially refined fuels using the unique signature of polar components, was investigated. The samples were analyzed by mass spectrometry using negative electrospray on an Agilent Series 1100 liquid chromatograph/mass spectrometer. These analysis were applied to hydrocarbon samples from a large,...
Exposing extinction risk analysis to pathogens: Is disease just another form of density dependence?
Leah R. Gerber, Hamish McCallum, Kevin D. Lafferty, John L. Sabo, Andy Dobson
2005, Ecological Applications (15) 1402-1414
In the United States and several other countries, the development of population viability analyses (PVA) is a legal requirement of any species survival plan developed for threatened and endangered species. Despite the importance of pathogens in natural populations, little attention has been given to host-pathogen dynamics in PVA. To study...
El Niño and displays of spring-flowering annuals in the Mojave and Sonoran deserts
Janice E. Bowers
2005, Journal of the Torrey Botanical Society (132) 38-49
Although popular and scientific literature frequently assumes a strong connection between El Niño-Southern Oscillation (ENSO) and good displays of spring-flowering annuals in the southwestern United States, such assumptions are based on anecdotal, short-term evidence. The goals of this study were to identify good wildflower years as objectively as possible, to...
