Identification of a novel arsenite oxidase gene, arxA, in the haloalkaliphilic, arsenite-oxidizing bacterium alkalilimnicola ehrlichii strain MLHE-1
Kamrun Zargar, Shelley E. Hoeft, Ronald S. Oremland, Chad W. Saltikov
2010, Journal of Bacteriology (192) 3755-3762
Although arsenic is highly toxic to most organisms, certain prokaryotes are known to grow on and respire toxic metalloids of arsenic (i.e., arsenate and arsenite). Two enzymes are known to be required for this arsenic-based metabolism: (i) the arsenate respiratory reductase (ArrA) and (ii) arsenite oxidase...
Reply to Comment on “Detrital U–Pb zircon dating of lower Ordovician syn-arc–continent collision conglomerates in the Irish Caledonides” by Peter D. Clift, Andrew Carter, Amy E. Draut, Hoang Van Long, David M. Chew, Hans A. Schouten, Tectonophysics 479 (2009), 165–174 (doi:10.1016/j.tecto.2008.07.018)
Peter D. Clift, Andrew Carter, Amy E. Draut, Hoang Van Long, Hans Schouten
2010, Tectonophysics (490) 138-139
No abstract available....
Channel geomorphic responses to disturbances assessed using streamgage information
Kyle E. Juracek, Mark W. Bowen
2010, Conference Paper, Proceedings of the 2nd Joint Federal Interagency Conference on Sedimentation and Hydrologic Modeling
No abstract available....
Visible and near-infrared multispectral analysis of geochemically measured rock fragments at the Opportunity landing site in Meridiani Planum
Catherine M. Weitz, William H. Farrand, Jeffrey R. Johnson, Iris Fleischer, Christian Schroder, Aileen Yingst, Bradley L. Jolliff, Ralf Gellert, Jim Bell, Kenneth E. Herkenhoff, G. Klingelhoefer, Barbara Cohen, Wendy M. Calvin, Malcolm Rutherford, James W. Ashley
2010, Journal of Geophysical Research E: Planets (115)
We have used visible and near‐infrared Panoramic Camera (Pancam) spectral data acquired by the Opportunity rover to analyze 15 rock fragments at the Meridiani Planum landing site. These spectral results were then compared to geochemistry measurements made by the in situ instruments Mössbauer (MB) and Alpha Particle X‐ray Spectrometer (APXS)...
Properties and distribution of paired candidate stony meteorites at Meridiani Planum
Christian Schroder, Kenneth E. Herkenhoff, William H. Farrand, John E. Chappelow, Wei Wang, L.R. Nittler, James W. Ashley, Iris Fleischer, Ralf Gellert, Matthew P. Golombek, Jeffrey R. Johnson, G. Klingelhoefer, Ron Li, Richard V. Morris, Steven W. Squyres
2010, Journal of Geophysical Research E: Planets (115)
The Mars Exploration Rover Opportunity investigated four rocks, informally dubbed Barberton, Santa Catarina, Santorini, and Kasos, that are possible stony meteorites. Their chemical and mineralogical composition is similar to the howardite, eucrite, and diogenite group but with additional metal, similar to mesosiderite silicate clasts. Because of their virtually identical composition...
Appendix A: Selected case studies of ecosystem contamination by selenium
Terry F. Young, Keith Finley, William J. Adams, John M. Besser, William A. Hopkins, Dianne Jolley, Eugenia McNaughton, Theresa S. Presser, D. Patrick Shaw, J. M. Unrine
Peter M. Chapman, William J. Adams, Marjorie L. Brooks, Charles G. Delos, Samuel N. Luoma, William A. Maher, Harry M. Ohlendorf, Theresa S. Presser, D. Patrick Shaw, editor(s)
2010, Book chapter, Ecological assessment of selenium in the aquatic environment
No abstract available....
Extending and testing Graizer-Kalkan ground motion attenuation model based on atlas database of shallow crustal events
Vladimir Graizer, Erol Kalkan, Kuo-Wan Lin
2010, Conference Paper, Proceedings of the 9th U.S. National and 10th Canadian Conference on Earthquake Engineering
No abstract available....
Regional and grain size influences on the geochemistry of soil at Gusev Crater
Suniti Karunatillake, Scott M. McLennan, Kenneth E. Herkenhoff
2010, Journal of Geophysical Research E: Planets (115)
Congruous with earlier work, Martian soil along the Spirit Rover's traverse at Gusev crater can be divided into three broad groups by size: fines (<150 μm), sand, and a mix of various grain sizes. The key chemical observation is greater homogeneity in fines relative to the other two, consistent with regional‐...
Gone with the wind: Eolian erasure of the Mars Rover tracks
Paul E. Geissler, R. Sullivan, M. Golombek, J. R. Johnson, Kenneth E. Herkenhoff, N. Bridges, Amy Vaughan, J. Maki, T. Parker, J. Bell
2010, Journal of Geophysical Research E: Planets (115)
The wheel tracks left by the Mars Exploration Rovers Spirit and Opportunity are unique artificial markings on the surface of Mars. The tracks stretch several kilometers across diverse terrain in two widely separated regions of the planet. The initial appearance and characteristics of the tracks were well documented by the...
Spirit Mars Rover Mission: Overview and selected results from the northern Home Plate Winter Haven to the side of Scamander crater
R. E. Arvidson, J.F. Bell III, P. Bellutta, N.A. Cabrol, J.G. Catalano, J. Cohen, L.S. Crumpler, D. J. Des Marais, T.A. Estlin, W.H. Farrand, R. Gellert, J. A. Grant, Rebecca N Greenberger, E.A. Guinness, Kenneth E. Herkenhoff, J.A. Herman, K.D. Iagnemma, J. R. Johnson, G. Klingelhoefer, K.A. Lichtenberg, S.A. Maxwell, D. W. Ming, R.V. Morris, M.S. Rice, S. W. Ruff, A. Shaw, Kirsten L. Siebach, Paulo A. de Souza Jr., A.W. Stroupe, S. W. Squyres, R.J. Sullivan, K.P. Talley, J.A. Townsend, A. Wang, J.R. Wright, A. S. Yen
2010, Journal of Geophysical Research E: Planets (115)
This paper summarizes Spirit Rover operations in the Columbia Hills, Gusev crater, from sol 1410 (start of the third winter campaign) to sol 2169 (when extrication attempts from Troy stopped to winterize the vehicle) and provides an overview of key scientific results. The third winter campaign took advantage of parking...
Mineralogy and chemistry of cobbles at Meridiani Planum, Mars, investigated by the Mars Exploration Rover Opportunity
I. Fleischer, J. Bruckner, C. Schroder, W. Farrand, E. Treguier, R.V. Morris, G. Klingelhoefer, Kenneth E. Herkenhoff, David W. Mittlefehldt, J. Ashley, M. Golombek, J. R. Johnson, B. Jolliff, Steve W. Squyres, C. Weitz, R. Gellert, Paulo A. de Souza Jr., B. A. Cohen
2010, Journal of Geophysical Research E: Planets (155)
Numerous loose rocks with dimensions of a few centimeters to tens of centimeters and with no obvious physical relationship to outcrop rocks have been observed along the traverse of the Mars Exploration Rover Opportunity. To date, about a dozen of these rocks have been analyzed with Opportunity's contact instruments, providing...
Sediment management strategies associated with dam removal in the State of Washington
C. S. Magirl, P.J. Connolly, B. Coffin, J.J. Duda, A.E. Draut
2010, Conference Paper, Proceedings of the 2nd Joint Federal Interagency Conference (9th Federal Interagency Sedimentation Conference and 4th Federal Interagency Hydrologic Modeling Conference)
Different removal strategies are described for dams in three diverse drainage basins (Wind River, White Salmon River, and Elwha River basins) in the State of Washington (USA). The comparisons between the strategies offer the opportunity to track the effects of sediment resulting from dam decommissioning in the Pacific Northwest and...
A chemostratigraphic method to determine the end of impact-related sedimentation at marine-target impact craters (Chesapeake Bay, Lockne, Tvären)
Jens Ormö, Andrew C. Hill, Jean M. Self-Trail
2010, Meteoritics and Planetary Science (45) 1206-1224
To better understand the impact cratering process and its environmental consequences at the local to global scale, it is important to know when in the geological record of an impact crater the impact-related processes cease. In many instances, this occurs with the end of early crater modification, leaving an obvious...
Suspended-sediment concentration regimes in Tennessee biological reference streams
Timothy H. Diehl, William J. Wolfe
2010, Conference Paper, Proceedings of the Joint Federal Interagency Conference 2010: Hydrology and sedimentation for a changing future: existing and emerging issues
Suspended-sediment-concentration (SSC) regimes of five biological reference streams in Tennessee were characterized from 15-minute SSC records spanning 1 to 4 water years (October 1 through September 30) between 2004 and 2008. These streams represent least disturbed conditions for their respective ecoregions and have exceptional biodiversity in terms of fish or...
Microbial carbon cycling in oligotrophic regional aquifers near the Tono Uranium Mine, Japan as inferred from δ13C and Δ14C values of in situ phospholipid fatty acids and carbon sources
Christopher T. Mills, Yuki Amano, Gregory F. Slater, Robert F. Dias, Teruki Iwatsuki, Kevin W. Mandernack
2010, Geochimica et Cosmochimica Acta (74) 3785-3805
Microorganisms are ubiquitous in deep subsurface environments, but their role in the global carbon cycle is not well-understood. The natural abundance δ13C and Δ14C values of microbial membrane phospholipid fatty acids (PLFAs) were measured and used to assess the carbon sources of bacteria in sedimentary and granitic groundwaters sampled from...
Identification, characterization and genetic mapping of TLR1 loci in rainbow trout (Oncorhynchus mykiss)
Yniv Palti, M. Fernanda Rodriguez, Scott A. Gahr, Maureen K. Purcell, Caird E. Rexroad III, Gregory D. Wiens
2010, Fish and Shellfish Immunology (28) 918-926
Induction of innate immune pathways is critical for early anti-microbial defense but there is limited understanding of how teleosts recognize microbial molecules and activate these pathways. In mammals, Toll-like receptors (TLR) 1 and 2 form a heterodimer involved in recognizing peptidoglycans and lipoproteins of microbial origin. Herein, we identify and...
Hydraulic alterations resulting from hydropower development in the Bonneville Reach of the Columbia River
James R. Hatten, Thomas R. Batt
2010, Northwest Science (84) 207-222
We used a two-dimensional (2D) hydrodynamic model to simulate and compare the hydraulic characteristics in a 74-km reach of the Columbia River (the Bonneville Reach) before and after construction of Bonneville Dam. For hydrodynamic modeling, we created a bathymetric layer of the Bonneville Reach from single-beam and multi-beam echo-sounder surveys,...
Delineating a road-salt plume in lakebed sediments using electrical resistivity, piezometers, and seepage meters at Mirror Lake, New Hampshire, U.S.A
Laura Toran, Melanie Johnson, Jonathan E. Nyquist, Donald O. Rosenberry
2010, Geophysics (75) WA75-WA83
Electrical-resistivity surveys, seepage meter measurements, and drive-point piezometers have been used to characterize chloride-enriched groundwater in lakebed sediments of Mirror Lake, New Hampshire, U.S.A. A combination of bottom-cable and floating-cable electrical-resistivity surveys identified a conductive zone (<100ohm-<mi...
Clockwise rotation and implications for northward drift of the western Transverse Ranges from paleomagnetism of the Piuma Member, Sespe Formation, near Malibu, California
John W. Hillhouse
2010, Geochemistry, Geophysics, Geosystems (11)
New paleomagnetic results from mid-Tertiary sedimentary beds in the Santa Monica Mountains reinforce the evidence for large-scale rotation of the western Transverse Ranges, and anisotropy measurements indicate that compaction-induced inclination flattening may resolve a long-standing controversy regarding the original paleolatitude of the rotated block. Previously published paleomagnetic data...
20,000 grain-size observations from the bed of the Colorado River, and implications for sediment transport through Grand Canyon
David M. Rubin, David J. Topping, Henry Chezar, Joseph E. Hazel Jr., John C. Schmidt, Michael J. Breedlove, Theodore S. Melis, Paul E. Grams
2010, Conference Paper
In the late 1990s, we developed digital imaging hardware and software for in-situ mapping of sand-sized bed sediment of the Colorado River in Grand Canyon. This new technology enables collection and processing of hundreds of grain-size samples in a day. Bed grain size was mapped using this equipment on 8...
Field evaluation of sediment-concentration errors arising from Non-Isokinetic intake efficiency in depth-integrating suspended-sediment bag samplers
Thomas A. Sabol, David J. Topping, Ronald E. Griffiths
2010, Conference Paper, Proceedings of the Joint Federal Interagency Conference 2010: Hydrology and sedimentation for a changing future: existing and emerging issues
Climate change and climate systems influence and control the atmospheric dispersion of desert dust: implications for human health
Dale W. Griffin
Richard C. Ragaini, editor(s)
2010, Conference Paper, International Seminar on Nuclear War and Planetary Emergencies 42nd session
The global dispersion of desert dust through Earth’s atmosphere is greatly influenced by temperature. Temporal analyses of ice core data have demonstrated that enhanced dust dispersion occurs during glacial events. This is due to an increase in ice cover, which results in an increase in drier terrestrial cover. A shorter...
Estimating salinity intrusion effects due to climate change along the Grand Strand of the South Carolina coast
Paul Conrads, Edwin A. Roehl Jr., Charles T. Sexton, Daniel L. Tufford, Gregory J. Carbone, Kristin Dow, John B. Cook
2010, Conference Paper, Proceedings of the Joint Federal Interagency Conference 2010: Hydrology and sedimentation for a changing future: Existing and emerging issues
The ability of water-resource managers to adapt to future climatic change is especially challenging in coastal regions of the world. The East Coast of the United States falls into this category given the high number of people living along the Atlantic seaboard and the added strain on resources as populations...
Evolving fluvial response of the Sandy River, Oregon, following removal of Marmot Dam
Jon J. Major, Jim O’Connor, Charles J. Podolak, Mackenzie K. Keith, Kurt R. Spicer, J. Rose Wallick, Heather M. Bragg, Smokey Pittman, Peter R. Wilcock, Abagail Rhode, Gordon E. Grant
2010, Conference Paper, Proceedings of the Joint Federal Interagency Conference 2010: Hydrology and sedimentation for a changing future: Existing and emerging issues
The October 2007 removal of Marmot Dam on the Sandy River, Oregon, triggered a rapid sequence of fluvial responses as ~730,000 m3 of sand and gravel that filled the former reservoir were suddenly exposed to an energetic river. Using direct measurements of sediment transport, photogrammetry, and repeat surveys between transport...
A hybrid finite-difference and analytic element groundwater model
Henk M. Haitjema, Daniel T. Feinstein, Randall J. Hunt, Maksym Gusyev
2010, Groundwater (48) 538-548
Regional finite-difference models tend to have large cell sizes, often on the order of 1–2 km on a side. Although the regional flow patterns in deeper formations may be adequately represented by such a model, the intricate surface water and groundwater interactions in the shallower layers are not. Several stream...
