New constraints on mechanisms of remotely triggered seismicity at Long Valley Caldera
E. E. Brodsky, S. G. Prejean
2005, Journal of Geophysical Research B: Solid Earth (110) 1-14
Regional-scale triggering of local earthquakes in the crust by seismic waves from distant main shocks has now been robustly documented for over a decade. Some of the most thoroughly recorded examples of repeated triggering of a single site from multiple, large earthquakes are measured in geothermal fields of the western...
Using cosmogenic nuclides to contrast rates of erosion and sediment yield in a semi-arid, arroyo-dominated landscape, Rio Puerco Basin, New Mexico
P.R. Bierman, J.M. Reuter, M. Pavich, A. C. Gellis, M.W. Caffee, J. Larsen
2005, Earth Surface Processes and Landforms (30) 935-953
Analysis of in-situ-produced 10Be and 26Al in 52 fluvial sediment samples shows that millennial-scale rates of erosion vary widely (7 to 366 m Ma-1) through the lithologically and topographically complex Rio Puerco Basin of northern New Mexico. Using isotopic analysis of both headwater and downstream samples, we determined that the...
Species frequency dynamics in an old-field succession: Effects of disturbance, fertilization and scale
David J. Gibson, Beth A. Middleton, K. Foster, Y. A. K. Honu, E. W. Hoyer, M. Mathis
2005, Journal of Vegetation Science (16) 415-422
Question:Can patterns of species frequency in an old-field be explained within the context of a metapopulation model? Are the patterns observed related to time, spatial scale, disturbance, and nutrient availability?Location:Upland and lowland old-fields in Illinois, USA.Method:Species richness was recorded annually for...
Factors controlling tungsten concentrations in ground water, Carson Desert, Nevada
R. L. Seiler, K.G. Stollenwerk, J.R. Garbarino
2005, Applied Geochemistry (20) 423-441
n investigation of a childhood leukemia cluster by US Centers for Disease Control and Prevention revealed that residents of the Carson Desert, Nevada, are exposed to high levels of W and this prompted an investigation of W in aquifers used as drinking water sources. Tungsten concentrations in 100 ground water...
The persistence of the water budget myth and its relationship to sustainability
J.F. Devlin, M. Sophocleous
2005, Hydrogeology Journal (13) 549-554
Sustainability and sustainable pumping are two different concepts that are often used interchangeably. The latter term refers to a pumping rate that can be maintained indefinitely without mining an aquifer, whereas the former term is broader and concerns such issues as ecology and water quality, among others, in addition to...
An analysis of region-of-influence methods for flood regionalization in the Gulf-Atlantic Rolling Plains
Ken Eng, Gary D. Tasker, P. C. D. Milly
2005, Journal of the American Water Resources Association (41) 135-143
Region-of-influence (RoI) approaches for estimating stream flow characteristics at ungaged sites were applied and evaluated in a case study of the 50-year peak discharge in the Gulf-Atlantic Rolling Plains of the southeastern United States. Linear regression against basin characteristics was performed for each ungaged site considered based on data from...
Distribution of aseismic slip rate on the Hayward fault inferred from seismic and geodetic data
D.A. Schmidt, R. Burgmann, R.M. Nadeau, M. d'Alessio
2005, Journal of Geophysical Research B: Solid Earth (110) 1-15
We solve for the slip rate distribution on the Hayward fault by performing a least squares inversion,of geodetic and seismic data sets. Our analysis focuses on the northern 60 km of the fault. Interferometric synthetic aperture radar (InSAR) data from 13 independent ERS interferograms are stacked to obtain range change...
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...
Late paleozoic base and precious metal deposits, East Tianshan, Xinjiang, China: Characteristics and geodynamic setting
J. Mao, R.J. Goldfarb, Y. Wang, C.J. Hart, Z. Wang, J. Yang
2005, Episodes (28) 23-36
The East Tianshan is a remote Gobi area located in eastern Xinjiang, northwestern China. In the past several years, a number of gold, porphyry copper, and Fe(-Cu) and Cu-Ag-Pb-Zn skarn deposits have been discovered there and are attracting exploration interest. The East Tianshan is located between the Junggar block to...
Brucite microbialites in living coral skeletons: Indicators of extreme microenvironments in shallow-marine settings
L.D. Nothdurft, G.E. Webb, N.A. Buster, C. W. Holmes, J.E. Sorauf, J.T. Kloprogge
2005, Geology (33) 169-172
Brucite [Mg(OH)2] microbialites occur in vacated interseptal spaces of living scleractinian coral colonies (Acropora, Pocillopora, Porites) from subtidal and intertidal settings in the Great Barrier Reef, Australia, and subtidal Montastraea from the Florida Keys, United States. Brucite encrusts microbial filaments of endobionts (i.e., fungi, green algae, cyanobacteria) growing under organic...
Ecology and shell chemistry of Loxoconcha matagordensis
T. M. Cronin, T. Kamiya, G. S. Dwyer, H. Belkin, C.D. Vann, S. Schwede, R. Wagner
2005, Palaeogeography, Palaeoclimatology, Palaeoecology (225) 14-67
Studies of the seasonal ecology and shell chemistry of the ostracode Loxoconcha matagordensis and related species of Loxoconcha from regions off eastern North America reveal that shell size and trace elemental (Mg/Ca ratio) composition are useful in paleothermometry using fossil populations. Seasonal sampling of populations from Chesapeake Bay, augmented by...
Consequences of harvesting for genetic diversity in American ginseng (Panax quinquefolius L.): A simulation study
J. M. Cruse-Sanders, J.L. Hamrick, J.A. Ahumada
2005, Biodiversity and Conservation (14) 493-504
American ginseng, Panax quinquefolius L., is one of the most heavily traded medicinal plants in North America. The effect of harvest on genetic diversity in ginseng was measured with a single generation culling simulation program. Culling scenarios included random harvest at varying levels, legal limit random harvest and legal limit...
The fate of estrogenic hormones in an engineered treatment wetland with dense macrophytes
J.L. Gray, D.L. Sedlak
2005, Water Environment Research (77) 24-31
Recently, the estrogenic hormones 17??-estradiol (E2) and 17??-ethinyl estradiol (EE2) have been detected in municipal wastewater effluent and surface waters at concentrations sufficient to cause feminization of male fish. To evaluate the fate of steroid hormones in an engineered treatment wetland, lithium chloride, E2, and EE 2 were added to...
Annual survival and site fidelity of northern pintails banded on the Yukon-Kuskokwim Delta, Alaska
Christopher A. Nicolai, Paul L. Flint, Michael L. Wege
2005, Journal of Wildlife Management (69) 1202-1210
We banded northern pintails (Anas acuta; n = 13,645) at a single site on the Yukon-Kuskokwim Delta (YKD), Alaska, USA, from 1990 to 2001. We used recaptures from our site in combination with hunter recoveries to model annual survival, recovery rates, and fidelity to our capture location. Most recoveries (>90%)...
Changes toward earlier streamflow timing across western North America
I.T. Stewart, D.R. Cayan, M. D. Dettinger
2005, Journal of Climate (18) 1136-1155
The highly variable timing of streamflow in snowmelt-dominated basins across western North America is an important consequence, and indicator, of climate fluctuations. Changes in the timing of snowmelt-derived streamflow from 1948 to 2002 were investigated in a network of 302 western North America gauges by examining the center of mass...
Arsenate adsorption mechanisms at the allophane: Water interface
Y. Arai, D.L. Sparks, J.A. Davis
2005, Environmental Science & Technology (39) 2537-2544
We investigated arsenate (As(V)) reactivity and surface speciation on amorphous aluminosilicate mineral (synthetic allophane) surfaces using batch adsorption experiments, powder X-ray diffraction (XRD), and X-ray absorption spectroscopy (XAS). The adsorption isotherm experiments indicated that As(V) uptake increased with increasing [As(V)]o from 50 to 1000 μM (i.e., Langmuir type...
Multilevel assessment of fish species traits to evaluate habitat degradation in streams of the upper midwest
R. M. Goldstein, M. R. Meador
2005, North American Journal of Fisheries Management (25) 180-194
We used species traits to examine the variation in fish assemblages for 21 streams in the Northern Lakes and Forests Ecoregion along a gradient of habitat disturbance. Fish species were classified based on five species trait-classes (trophic ecology, substrate preference, geomorphic preference, locomotion morphology, and reproductive strategy) and 29 categories...
Stratigraphic and geochemical evolution of an oceanic arc upper crustal section: The Jurassic Talkeetna Volcanic Formation, south-central Alaska
P.D. Clift, A.E. Draut, P.B. Kelemen, J. Blusztajn, A. Greene
2005, Geological Society of America Bulletin (117) 902-925
The Early Jurassic Talkeetna Volcanic Formation forms the upper stratigraphic level of an oceanic volcanic arc complex within the Peninsular Terrane of south-central Alaska. The section comprises a series of lavas, tuffs, and volcaniclastic debris-How and flow turbidite deposits, showing significant lateral facies variability. There is a general trend toward...
Factors affecting the occurrence of saugers in small, high-elevation rivers near the western edge of the species' natural distribution
C.J. Amadio, W.A. Hubert, Kevin Johnson, D. Oberlie, D. Dufek
2005, Transactions of the American Fisheries Society (134) 160-171
Factors affecting the occurrence of saugers Sander canadensis were studied throughout the Wind River basin, a high-elevation watershed (> 1,440 m above mean sea level) on the western periphery of the species' natural distribution in central Wyoming. Adult saugers appeared to have a contiguous distribution over 170 km of streams...
Water level dynamics in wetlands and nesting success of Black Terns in Maine
Andrew T. Gilbert, F. A. Servello
2005, Waterbirds (28) 181-187
The Black Tern (Chlidonias niger) nests in freshwater wetlands that are prone to water level fluctuations, and nest losses to flooding are common. We examined temporal patterns in water levels at six sites with Black Tern colonies in Maine and determined probabilities of flood events and associated nest loss...
Benthic invertebrate community structure is influenced by forest succession after clearcut logging in southeastern Alaska
O. Hernandez, R.W. Merritt, M.S. Wipfli
2005, Hydrobiologia (533) 45-59
To assess the effects of timber harvesting on headwater streams in upland forests, benthic community structure was contrasted among four dominant forest management types (old growth, red alder-dominated young growth, conifer-dominated young growth, clearcut) and instream habitats (woody debris, cobble, gravel) in southeastern Alaska. Benthos in streams of previously harvested...
Burrowing mayflies as indicators of ecosystem health: Status of populations in western Lake Erie, Saginaw Bay and Green Bay
T.A. Edsall, M.T. Bur, O. T. Gorman, J.S. Schaeffer
2005, Aquatic Ecosystem Health & Management (8) 107-116
The U.S. Environmental Protection Agency and Environment Canada are supporting the development of indicators of ecosystem health that can be used to report on progress in restoring and maintaining the Great Lakes ecosystem, as called for in the Great Lakes Water Quality Agreement between the United States and Canada. One...
TREMOR: A wireless MEMS accelerograph for dense arrays
J.R. Evans, R.H. Hamstra Jr., C. Kundig, P. Camina, J. A. Rogers
2005, Earthquake Spectra (21) 91-124
The ability of a strong-motion network to resolve wavefields can be described on three axes: frequency, amplitude, and space. While the need for spatial resolution is apparent, for practical reasons that axis is often neglected. TREMOR is a MEMS-based accelerograph using wireless Internet to minimize lifecycle cost. TREMOR instruments can...
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....
Late Pennsylvanian and early permian chondrichthyan microremains from San Salvador Patlanoaya (Puebla, Mexico)
C. Derycke-Khatir, D. Vachard, J.-M. Degardin, A. Flores de Dios, B. Buitron, M. Hansen
2005, Geobios (38) 43-55
The San Salvador Patlanoaya section (Puebla State, Mexico) is known for its richness of many fossil groups. Among them, the calcareous shells have been principally investigated. This paper deals with Missourian-Virgilian (Late Pennsylvanian) and Leonardian (late Early Permian) Mexican fish remains. A discussion about Helicoprion and related genera, is followed...
