Regional surficial geochemistry of the northern Great Basin
S. Ludington, H. Folger, B. Kotlyar, V.G. Mossotti, M.J. Coombs, T.G. Hildenbrand
2006, Economic Geology (101) 33-57
The regional distribution of arsenic and 20 other elements in stream-sediment samples in northern Nevada and southeastern Oregon was studied in order to gain new insights about the geologic framework and patterns of hydrothermal mineralization in the area. Data were used from 10,261 samples that were originally collected during the...
Observations in the Saturn system during approach and orbital insertion, with Cassini's visual and infrared mapping spectrometer (VIMS)
R. H. Brown, K. H. Baines, G. Bellucci, B. J. Buratti, F. Capaccioni, P. Cerroni, R. N. Clark, A. Coradini, D. P. Cruikshank, P. Drossart, V. Formisano, R. Jaumann, Y. Langevin, D. L. Matson, T. B. McCord, V. Mennella, R.M. Nelson, P. D. Nicholson, B. Sicardy, Christophe Sotin, N. Baugh, C.A. Griffith, G. B. Hansen, C. A. Hibbitts, T.W. Momary, M.R. Showalter
2006, Astronomy and Astrophysics (446) 707-716
The Visual and Infrared Mapping Spectrometer observed Phoebe, Iapetus, Titan and Saturn's rings during Cassini's approach and orbital insertion. Phoebe's surface contains water ice, CO2, and ferrous iron. lapetus contains CO2 and organic materials. Titan's atmosphere shows methane fluorescence, and night-side atmospheric emission that may be CO2 and CH3D. As...
Linking landscape characteristics to mineral site use by band-tailed pigeons in Western Oregon: Coarse-filter conservation with fine-filter tuning
C.T. Overton, R.A. Schmitz, Michael L. Casazza
2006, Natural Areas Journal (26) 38-46
Mineral sites are scarce resources of high ion concentration used heavily by the Pacific Coast subpopulation of band-tailed pigeons. Over 20% of all known mineral sites used by band-tailed pigeons in western Oregon, including all hot springs, have been abandoned. Prior investigations have not analyzed stand or landscape level habitat...
Impacts of the 2004 tsunami on groundwater resources in Sri Lanka
Tissa H. Illangasekare, Scott W. Tyler, T. Prabhakar Clement, Karen G. Villholth, A.P.G.R.L. Perera, Jayantha Obeysekera, Ananda Gunatilaka, C.R. Panabokke, David W. Hyndman, Kevin J. Cunningham, Jagath J. Kaluarachchi, William W.-G. Yeh, Martinus T. van Van Genuchten, Karsten H. Jensen
2006, Water Resources Research (42)
The 26 December 2004 tsunami caused widespread destruction and contamination of coastal aquifers across southern Asia. Seawater filled domestic open dug wells and also entered the aquifers via direct infiltration during the first flooding waves and later as ponded seawater infiltrated through the permeable sands that are typical of coastal...
Minding the gap: Frequency of indels in mtDNA control region sequence data and influence on population genetic analyses
John M. Pearce
2006, Molecular Ecology (15) 333-341
Insertions and deletions (indels) result in sequences of various lengths when homologous gene regions are compared among individuals or species. Although indels are typically phylogenetically informative, occurrence and incorporation of these characters as gaps in intraspecific population genetic data sets are rarely discussed. Moreover, the impact of gaps on estimates...
Site response and attenuation in the Puget Lowland, Washington State
T. L. Pratt, T.M. Brocher
2006, Bulletin of the Seismological Society of America (96) 536-552
Simple spectral ratio (SSR) and horizontal-to-vertical (HN) site-response estimates at 47 sites in the Puget Lowland of Washington State document significant attenuation of 1.5- to 20-Hz shear waves within sedimentary basins there. Amplitudes of the horizontal components of shear-wave arrivals from three local earthquakes were used to compute SSRs with...
Detrital zircon provenance of the Late Triassic Songpan-Ganzi complex: Sedimentary record of collision of the North and South China blocks
Amy Weislogel, Stephan A. Graham, E. Z. Chang, Joseph L. Wooden, George E. Gehrels, H. Yang
2006, Geology (34) 97-100
Using detrital zircon geochronology, turbidite deposystems fed from distinct sediment sources can be distinguished within the Songpan-Ganzi complex, a collapsed Middle to Late Triassic turbidite basin of central China. A southern Songpan-Ganzi deposystem initially was sourced solely by erosion of the Qinling-Dabie orogen during early Late Triassic time, then by...
Characterization of sediment trapped by macroalgae on a Hawaiian reef flat
R.E. Stamski, M.E. Field
2006, Estuarine, Coastal and Shelf Science (66) 211-216
Reef researchers studying community shifts in the balance between corals and fleshy macroalgae have noted that algae are often covered with sediment. This study characterizes sediment trapping by macroalgae within a Hawaiian reef habitat and constrains the controls on this process. Sediment-laden macroalgae were sampled and macroalgal cover was assessed...
Arbuscular mycorrhizal fungi associated with Populus-Salix stands in a semiarid riparian ecosystem
Vanessa B. Beauchamp, J.C. Stromberg, J.C. Stutz
2006, New Phytologist (170) 369-380
??? This study examined the activity, species richness, and species composition of the arbuscular mycorrhizal fungal (AMF) community of Populus-Salix stands on the Verde River (Arizona, USA), quantified patterns of AMF richness and colonization along complex floodplain gradients, and identified environmental variables responsible for structuring the AMF community. ??? Samples...
Urban contributions of glyphosate and its degradate AMPA to streams in the United States
D.W. Kolpin, E.M. Thurman, E.A. Lee, M. T. Meyer, E. T. Furlong, S.T. Glassmeyer
2006, Science of the Total Environment (354) 191-197
Glyphosate is the most widely used herbicide in the world, being routinely applied to control weeds in both agricultural and urban settings. Microbial degradation of glyphosate produces aminomethyl phosphonic acid (AMPA). The high polarity and water-solubility of glyphosate and AMPA has, until recently, made their analysis in water samples problematic....
Effects of El Niño on distribution and reproductive performance of Black Brant
James S. Sedinger, David H. Ward, Jason L. Schamber, William I. Butler, William D. Eldridge, Bruce Conant, James F. Voelzer, Nathan Chelgren, Mark P. Herzog
2006, Ecology (87) 151-159
Climate in low-latitude wintering areas may influence temperate and high-latitude breeding populations of birds, but demonstrations of such relationships have been rare because of difficulties in linking wintering with breeding populations. We used long-term aerial surveys in Mexican wintering areas and breeding areas in Alaska, USA, to assess numbers of...
Sources of variation in survival of breeding female wood ducks
Kevin M. Hartke, J.B. Grand, Gary R. Hepp, T.H. Folk
2006, Condor (108) 201-210
In waterfowl, reproduction is physiologically demanding and females are exposed to varying risks of mortality at different periods of the breeding cycle. Moreover, differences among females may influence survival within breeding periods. We captured and fitted female Wood Ducks (Aix sponsa) with radio-transmitters before nest initiation during two breeding seasons...
Interaction Assessment: A modeling tool for predicting population dynamics from field data
John M. Emlen, Jeffrey J. Duda, Matt D. Kirchhoff, D. Carl Freeman
2006, Ecological Modelling (192) 557-570
Interaction Assessment (INTASS) is a field and analytic methodology for constructing population dynamics models. Because data collected in generating a model for one species comprise much of the information needed for other species, a small increase in effort can result in simultaneous expressions for the dynamics of multiple species. These...
A broadscale fish-habitat model development process: Genesee Basin, New York
James E. McKenna Jr., Richard R. McDonald, Chris Castiglione, Sandy S. Morrison, Kurt P. Kowalski, Dora R. May Passino
2006, Book chapter, Landscape influences on stream habitats and biological assemblages
We describe a methodology for developing species-habitat models using available fish and stream habitat data from New York State, focusing on the Genesee basin. Electrofishing data from the New York Department of Environmental Conservation were standardized and used for model development and testing. Four types of predictive models (multiple linear...
The effect of creosote on vitellogenin production in rainbow trout (Oncorhynchus mykiss)
J.P. Sherry, J.J. Whyte, N.A. Karrow, A. Gamble, H.J. Boerman, N.C. Bol, D.G. Dixon, K.R. Solomon
2006, Archives of Environmental Contamination and Toxicology (50) 65-68
As part of a broader investigation into the effects of creosote treatments on the aquatic biota in pond microcosms, we examined the possible implications for vitellogenin (Vtg) production in Oncorhynchus mykiss [rainbow trout (RT)]. Vtg is the precursor of egg yolk protein and has emerged as a useful biomarker of...
Influence of depositional setting and sedimentary fabric on mechanical layer evolution in carbonate aquifers
Wall B.R. Graham
2006, Sedimentary Geology (184) 203-224
Carbonate aquifers in fold-thrust belt settings often have low-matrix porosity and permeability, and thus groundwater flow pathways depend on high porosity and permeability fracture and fault zones. Methods from sedimentology and structural geology are combined to understand the evolution of fracture controlled flow pathways and determine their spatial distribution. Through...
Temporal evolution of carbon budgets of the Appalachian forests in the U.S. from 1972 to 2000
J. Liu, S. Liu, Thomas R. Loveland
2006, Forest Ecology and Management (222) 191-201
Estimating dynamic terrestrial ecosystem carbon (C) sources and sinks over large areas is difficult. The scaling of C sources and sinks from the field level to the regional level has been challenging due to the variations of climate, soil, vegetation, and disturbances. As part of an effort to estimate the...
Geodetic observations and modeling of magmatic inflation at the Three Sisters volcanic center, central Oregon Cascade Range, USA
Daniel Dzurisin, Michael Lisowski, Charles W. Wicks Jr., Michael P. Poland, Elliot T. Endo
2006, Journal of Volcanology and Geothermal Research (150) 35-54
Tumescence at the Three Sisters volcanic center began sometime between summer 1996 and summer 1998 and was discovered in April 2001 using interferometric synthetic aperture radar (InSAR). Swelling is centered about 5 km west of the summit of South Sister, a composite basaltic-andesite to rhyolite volcano that last erupted between...
Examination of the watershed-wide distribution of Escherichia coli along southern Lake Michigan: An integrated approach
R.L. Whitman, M.B. Nevers, M.N. Byappanahalli
2006, Applied and Environmental Microbiology (72) 7301-7310
Recent research has highlighted the occurrence of Escherichia coli in natural habitats not directly influenced by sewage inputs. Most studies on E. coli in recreational water typically focus on discernible sources (e.g., effluent discharge and runoff) and fall short of integrating riparian, nearshore, onshore, and outfall sources. An integrated “beachshed” approach that links E. coli inputs...
Combined time-series resistivity and geochemical tracer techniques to examine submarine groundwater discharge at Dor Beach, Israel
P.W. Swarzenski, W. C. Burnett, W.J. Greenwood, B. Herut, R. Peterson, N. Dimova, Y. Shalem, Y. Yechieli, Y. Weinstein
2006, Geophysical Research Letters (33)
A high-resolution, stationary geophysical and geochemical survey was conducted at Dor Beach, Israel, to examine the shallow coastal hydrogeology and its control on the exchange of submarine groundwater with the shallow Mediterranean Sea. Time-series resistivity profiles using a new 56 electrode (112-m long) marine cable produced detailed profiles of the...
Ripple effect: Unforeseen applications of sand studies
D. M. Rubin
2006, Eos, Transactions, American Geophysical Union (87) 295-296
[No abstract available]...
Three-dimensional compressional wavespeed model, earthquake relocations, and focal mechanisms for the Parkfield, California, region
C. Thurber, H. Zhang, F. Waldhauser, J. Hardebeck, A. Michael, D. Eberhart-Phillips
2006, Bulletin of the Seismological Society of America (96)
We present a new three-dimensional (3D) compressional vvavespeed (V p) model for the Parkfield region, taking advantage of the recent seismicity associated with the 2003 San Simeon and 2004 Parkfield earthquake sequences to provide increased model resolution compared to the work of Eberhart-Phillips and Michael (1993) (EPM93). Taking the EPM93...
Foreword: Understanding through modeling
C. Zheng, E. Poeter, M. Hill, J. Doherty
2006, Conference Paper, Ground Water
[No abstract available]...
Slip on the San Andreas fault at Parkfield, California, over two earthquake cycles, and the implications for seismic hazard
J. Murray, J. Langbein
2006, Bulletin of the Seismological Society of America (96)
Parkfield, California, which experienced M 6.0 earthquakes in 1934, 1966, and 2004, is one of the few locales for which geodetic observations span multiple earthquake cycles. We undertake a comprehensive study of deformation over the most recent earthquake cycle and explore the results in the context of geodetic data collected...
Small satellite multi mission C2 for maximum effect
E. Miller, O. Medina, C. R. Lane, A. Kirkham, W. Ivancic, B. Jones, R. Risty
2006, Conference Paper, European Space Agency, (Special Publication) ESA SP
This paper discusses US Air Force, US Army, US Navy, and NASA demonstrations based around the Virtual Mission Operations Center (VMOC) and its application in fielding a Multi Mission Satellite Operations Center (MMSOC) designed to integrate small satellites into the inherently tiered system environment of operations. The intent is to...
