Evolution of a Holocene delta driven by episodic sediment delivery and coseismic deformation, Puget Sound, Washington, USA
W. A. Barnhardt, B.L. Sherrod
2006, Sedimentology (53) 1211-1228
Episodic, large-volume pulses of volcaniclastic sediment and coseismic subsidence of the coast have influenced the development of a late Holocene delta at southern Puget Sound. Multibeam bathymetry, ground-penetrating radar (GPR) and vibracores were used to investigate the morphologic and stratigraphic evolution of the Nisqually River delta. Two fluvial–deltaic facies are...
Evidence for ground-water stratification near Yucca Mountain, Nevada
K. Futa, B.D. Marshall, Z. E. Peterman
2006, Conference Paper, Proceedings of the 11th International High Level Radioactive Waste Management Conference, IHLRWM
Major- and trace-element concentrations and strontium isotope ratios (strontium-87/strontium-86) in samples of ground water potentially can be useful in delineating flow paths in the complex ground-water system in the vicinity of Yucca Mountain, Nevada. Water samples were collected from boreholes to characterize the lateral and vertical variability in the composition...
Seasonal and spatial patterns of metals at a restored copper mine site. I. Stream copper and zinc
D.G. Bambic, Charles N. Alpers, P.G. Green, E. Fanelli, W.K. Silk
2006, Environmental Pollution (144) 774-782
Seasonal and spatial variations in metal concentrations and pH were found in a stream at a restored copper mine site located near a massive sulfide deposit in the Foothill copper-zinc belt of the Sierra Nevada, California. At the mouth of the stream, copper concentrations increased and pH decreased with increased...
Diet shifts of lesser scaup are consistent with the spring condition hypothesis
M.J. Anteau, A. D. Afton
2006, Canadian Journal of Zoology (84) 779-786
We compared diets of lesser scaup (Aythya affinis (Eyton, 1838)) in the springs of 2000 and 2001 to those reported in the 1970s and the 1980s to determine whether forage quality has declined as predicted by the spring condition hypothesis. In Minnesota, we found that the current aggregate percentage of...
The role of environmental gradients in non-native plant invasion into burnt areas of Yosemite National Park, California
R. Klinger, E.C. Underwood, P.E. Moore
2006, Diversity and Distributions (12) 139-156
Fire is known to facilitate the invasion of many non-native plant species, but how invasion into burnt areas varies along environmental gradients is not well-understood. We used two pre-existing data sets to analyse patterns of invasion by non-native plant species into burnt areas along gradients of topography, soil and vegetation...
Identification and regulatory analysis of rainbow trout tapasin and tapasin-related genes
E.D. Landis, Y. Palti, J. Dekoning, R. Drew, R.B. Phillips, J.D. Hansen
2006, Immunogenetics (58) 56-69
Tapasin (TAPBP) is a key member of MHC class Ia antigen-loading complexes, bridging the class Ia molecule to the transporter associated with antigen presentation (TAP). As part of an ongoing study of MHC genomics in rainbow trout, we have identified two rainbow trout TAPBP genes (Onmy-TAPBP.a and .b) and a...
Cassini observations of flow-like features in western Tui Regio, Titan
J. W. Barnes, R. H. Brown, J. Radebaugh, B. J. Buratti, Christophe Sotin, S. Le Mouelic, S. Rodriguez, E. P. Turtle, J. Perry, R. Clark, K. H. Baines, P. D. Nicholson
2006, Geophysical Research Letters (33)
A large (>3 ?? 104 km2), lobate, 5-??m-bright region seen by Cassini on Titan's leading equatorial region is best explained as a flow field. We discuss observations from the Visual and Infrared Mapping Spectrometer and Imaging Science Subsystem of the feature and present a map of the field. We establish...
Flow convergence caused by a salinity minimum in a tidal channel
John C. Warner, David H. Schoellhamer, Jon R. Burau, S. Geoffrey Schladow
2006, San Francisco Estuary and Watershed Science (4) 91-102
Residence times of dissolved substances and sedimentation rates in tidal channels are affected by residual (tidally averaged) circulation patterns. One influence on these circulation patterns is the longitudinal density gradient. In most estuaries the longitudinal density gradient typically maintains a constant direction. However, a junction of tidal channels can create...
Comparison of synthesis of 15α-hydroxylated steroids in males of four North American lamprey species
Mara B. Bryan, Bradley A. Young, David A. Close, Jesse Semeyn, T. Craig Robinson, Jennifer M. Bayer, Weiming Li
2006, General and Comparative Endocrinology (146) 149-156
Recent studies have provided evidence that 15α-hydroxytestosterone (15α-T) and 15α-hydroxyprogesterone (15α-P) are produced in vitro and in vivo in adult male sea lampreys (Petromyzonmarinus), and that circulatory levels increase in response to injections with gonadotropin-releasing hormone (GnRH). We examined four species from the Petromyzontidae family including silver lampreys...
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...
Characterization and petrologic interpretation of olivine-rich basalts at Gusev Crater, Mars
H.Y. McSween, M.B. Wyatt, Ralf Gellert, J.F. Bell, R.V. Morris, Kenneth E. Herkenhoff, L.S. Crumpler, K.A. Milam, K.R. Stockstill, L.L. Tornabene, R. E. Arvidson, P. Bartlett, D. Blaney, N.A. Cabrol, P. R. Christensen, B. C. Clark, J.A. Crisp, D.J. Des Marais, T. Economou, J.D. Farmer, W. Farrand, A. Ghosh, M. Golombek, S. Gorevan, R. Greeley, V.E. Hamilton, J. R. Johnson, B.L. Joliff, G. Klingelhofer, A.T. Knudson, S. McLennan, D. Ming, J.E. Moersch, R. Rieder, S. W. Ruff, C. Schroder, P.A. de Souza, S. W. Squyres, H. Wanke, A. Wang, A. Yen, J. Zipfel
2006, Journal of Geophysical Research E: Planets (111)
Rocks on the floor of Gusev crater are basalts of uniform composition and mineralogy. Olivine, the only mineral to have been identified or inferred from data by all instruments on the Spirit rover, is especially abundant in these rocks. These picritic basalts are similar in many respects to certain Martian...
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...
A variance-decomposition approach to investigating multiscale habitat associations
J.J. Lawler, T.C. Edwards Jr.
2006, Conference Paper, Condor
The recognition of the importance of spatial scale in ecology has led many researchers to take multiscale approaches to studying habitat associations. However, few of the studies that investigate habitat associations at multiple spatial scales have considered the potential effects of cross-scale correlations in measured habitat variables. When cross-scale correlations...
PEPA-1* genotype affects return rate for hatchery steelhead
R.R. Reisenbichler, M.C. Hayes, S.P. Rubin, L.A. Wetzel, B.M. Baker
2006, Transactions of the American Fisheries Society (135) 28-39
Allozymes continue to be useful as genetic markers in a variety of studies; however, their utility often hinges on the selective neutrality of the allelic variation. Our study tested for neutrality between the two most common alleles (*100 and *110) at the cytosol nonspecific dipeptidase locus (PEPA-1*) in steelhead Oncorhynchus...
Real-time measurement of volcanic SO2 emissions: Validation of a new UV correlation spectrometer (FLYSPEC)
Keith A. Horton, Glyn Williams-Jones, Harold Garbeil, Tamar Elias, A. Jeff Sutton, Peter J. Mouginis-Mark, John T. Porter, Steven Clegg
2006, Bulletin of Volcanology (68) 323-327
A miniaturized, lightweight and low-cost UV correlation spectrometer, the FLYSPEC, has been developed as an alternative for the COSPEC, which has long been the mainstay for monitoring volcanic sulfur dioxide fluxes. Field experiments have been conducted with the FLYSPEC at diverse volcanic systems, including Masaya (Nicaragua), Poás (Costa Rica), Stromboli,...
Crustal structure across the Altyn Tagh Range at the northern margin of the Tibetan Plateau and tectonic implications
J. Zhao, Walter D. Mooney, X. Zhang, Z. Li, Z. Jin, N. Okaya
2006, Earth and Planetary Science Letters (241) 804-814
We present new seismic refraction/wide-angle-reflection data across the Altyn Tagh Range and its adjacent basins. We find that the crustal velocity structure, and by inference, the composition of the crust changes abruptly beneath the Cherchen fault, i.e., ∼100 km north of the northern...
Submarine sliver in North Kona: A window into the early magmatic and growth history of Hualalai Volcano, Hawaii
Julia E. Hammer, Michelle L. Coombs, Patrick J. Shamberger, Jun-Ichi Kimura
2006, Journal of Volcanology and Geothermal Research (151) 157-188
Two manned submersible dives examined the Hualalai Northwest rift zone and an elongate ridge cresting at 3900 mbsl during a 2002 JAMSTEC cruise. The rift zone flank at dive site S690 (water depth 3412–2104 m) is draped by elongated and truncated pillow lavas. These olivine-rich tholeiitic lavas are compositionally...
Midwestern streamflow, precipitation, and atmospheric vorticity influenced by Pacific sea-surface temperatures and total solar-irradiance variations
C. A. Perry
2006, International Journal of Climatology (26) 207-218
A solar effect on streamflow in the Midwestern United States is described and supported in a six-step physical connection between total solar irradiance (TSI), tropical sea-surface temperatures (SSTs), extratropical SSTs, jet-stream vorticity, surface-layer vorticity, precipitation, and streamflow. Variations in the correlations among the individual steps indicate that the solar/hydroclimatic mechanism...
Greater sage-grouse as an umbrella species for sagebrush-associated vertebrates
M.M. Rowland, M.J. Wisdom, L.H. Suring, C.W. Meinke
2006, Biological Conservation (129) 323-335
Widespread degradation of the sagebrush ecosystem in the western United States, including the invasion of cheatgrass, has prompted resource managers to consider a variety of approaches to restore and conserve habitats for sagebrush-associated species. One such approach involves the use of greater sage-grouse, a species of prominent conservation interest, as...
Predictable hotspots and foraging habitat of the endangered short-tailed albatross (Phoebastria albatrus) in the North Pacific: Implications for conservation
John F. Piatt, J. Wetzel, K. Bell, A.R. DeGange, G.R. Balogh, G.S. Drew, T. Geernaert, C. Ladd, G.V. Byrd
2006, Deep-Sea Research Part II: Topical Studies in Oceanography (53) 387-398
The short-tailed albatross (Phoebastria albatrus) is a rare and endangered seabird that ranges widely over the northern North Pacific. Populations are slowly recovering but birds face several threats at sea, in particular the incidental capture of birds in long-line fisheries. Conservation efforts are hampered by a lack of information about...
Crustal contamination and crystal entrapment during polybaric magma evolution at Mt. Somma-Vesuvius volcano, Italy: Geochemical and Sr isotope evidence
M. Piochi, R. A. Ayuso, B. de Vivo, R. Somma
2006, LITHOS (86) 303-329
New major and trace element analyses and Sr-isotope determinations of rocks from Mt. Somma-Vesuvius volcano produced from 25 ky BP to 1944 AD are part of an extensive database documenting the geochemical evolution of this classic region. Volcanic rocks include silica undersaturated, potassic and ultrapotassic lavas and tephras characterized by...
Predicting water-surface fluctuation of continental lakes: A RS and GIS based approach in Central Mexico
M.E. Mendoza, G. Bocco, M. Bravo, Granados E. Lopez, W. R. Osterkamp
2006, Water Resources Management (20) 291-311
Changes in the water-surface area occupied by the Cuitzeo Lake, Mexico, during the 1974-2001 period are analysed in this study. The research is based on remote sensing and geographic information techniques, as well as statistical analysis. High-resolution satellite image data were used to analyse the 1974-2000 period, and very low-resolution...
Mapping stream habitats with a global positioning system: Accuracy, precision, and comparison with traditional methods
D.C. Dauwalter, W.L. Fisher, K.C. Belt
2006, Environmental Management (37) 271-280
We tested the precision and accuracy of the Trimble GeoXT??? global positioning system (GPS) handheld receiver on point and area features and compared estimates of stream habitat dimensions (e.g., lengths and areas of riffles and pools) that were made in three different Oklahoma streams using the GPS receiver and a...
Updated streamflow reconstructions for the Upper Colorado River Basin
Connie A. Woodhouse, Stephen T. Gray, David M. Meko
2006, Water Resources Research (42)
Updated proxy reconstructions of water year (October–September) streamflow for four key gauges in the Upper Colorado River Basin were generated using an expanded tree ring network and longer calibration records than in previous efforts. Reconstructed gauges include the Green River at Green River, Utah; Colorado near Cisco, Utah; San Juan...
Hierarchical models for avian ecologists
W. B. Kristan III, J. M. Scott
2006, Conference Paper, Condor
[No abstract available]...
