Spatial trends in tidal flat shape and associated environmental parameters in South San Francisco Bay
J.A. Bearman, Carl T. Friedrichs, B. E. Jaffe, A.C. Foxgrover
2010, Journal of Coastal Research (26) 342-349
Spatial trends in the shape of profiles of South San Francisco Bay (SSFB) tidal flats are examined using bathymetric and lidar data collected in 2004 and 2005. Eigenfunction analysis reveals a dominant mode of morphologic variability related to the degree of convexity or concavity in the cross-shore profileindicative of (i)...
Propagule pressure and stream characteristics influence introgression: Cutthroat and rainbow trout in British Columbia
S.N. Bennett, J.R. Olson, J. L. Kershner, P. Corbett
2010, Ecological Applications (20) 263-277
Hybridization and introgression between introduced and native salmonids threaten the continued persistence of many inland cutthroat trout species. Environmental models have been developed to predict the spread of introgression, but few studies have assessed the role of propagule pressure. We used an extensive set of fish stocking records and geographic...
Fuel deposition rates of montane and subalpine conifers in the central Sierra Nevada, California, USA
J. W. van Wagtendonk, P.E. Moore
2010, Forest Ecology and Management (259) 2122-2132
Fire managers and researchers need information on fuel deposition rates to estimate future changes in fuel bed characteristics, determine when forests transition to another fire behavior fuel model, estimate future changes in fuel bed characteristics, and parameterize and validate ecosystem process models. This information is lacking for many ecosystems including...
Radiometric, geometric, and image quality assessment of ALOS AVNIR-2 and PRISM sensors
S. Saunier, P. Goryl, G. Chander, R. Santer, M. Bouvet, B. Collet, A. Mambimba, Aksakal S. Kocaman
2010, IEEE Transactions on Geoscience and Remote Sensing (48) 3855-3866
The Advanced Land Observing Satellite (ALOS) was launched on January 24, 2006, by a Japan Aerospace Exploration Agency (JAXA) H-IIA launcher. It carries three remote-sensing sensors: 1) the Advanced Visible and Near-Infrared Radiometer type 2 (AVNIR-2); 2) the Panchromatic Remote-Sensing Instrument for Stereo Mapping (PRISM); and 3) the Phased-Array type...
Identifying regions of strong scattering at the core-mantle boundary from analysis of PKKP precursor energy
S. Rost, P.S. Earle
2010, Earth and Planetary Science Letters (297) 616-626
We detect seismic scattering from the core-mantle boundary related to the phase PKKP (PK. KP) in data from small aperture seismic arrays in India and Canada. The detection of these scattered waves in data from small aperture arrays is new and allows a better characterization of the fine-scale structure of...
Morphologic dating of fault scarps using airborne laser swath mapping (ALSM) data
G.E. Hilley, S. Delong, C. Prentice, K. Blisniuk, J.R. Arrowsmith Jr.
2010, Geophysical Research Letters (37)
Models of fault scarp morphology have been previously used to infer the relative age of different fault scarps in a fault zone using labor-intensive ground surveying. We present a method for automatically extracting scarp morphologic ages within high-resolution digital topography. Scarp degradation is modeled as a diffusive mass transport process...
Exploring the limits of identifying sub-pixel thermal features using ASTER TIR data
R. Greg Vaughan, Laszlo P. Keszthelyi, Ashley G. Davies, David J. Schneider, Cheryl Jaworowski, Henry Heasler
2010, Journal of Volcanology and Geothermal Research (189) 225-237
Understanding the characteristics of volcanic thermal emissions and how they change with time is important for forecasting and monitoring volcanic activity and potential hazards. Satellite instruments view volcanic thermal features across the globe at various temporal and spatial resolutions. Thermal features that may be a precursor to a major eruption,...
Gravity modeling of the Muertos Trough and tectonic implications (north-eastern Caribbean)
Bruna J.L. Granja, A. Munoz-Martin, Uri S. ten Brink, Andres Carbo-Gorosabel, Estrada P. Llanes, J. Martin-Davila, D. Cordoba-Barba, Morollon M. Catalan
2010, Marine Geophysical Research (31) 263-283
The Muertos Trough in the northeast Caribbean has been interpreted as a subduction zone from seismicity, leading to infer a possible reversal subduction polarity. However, the distribution of the seismicity is very diffuse and makes definition of the plate geometry difficult. In addition, the compressive deformational features observed in the...
A rain splash transport equation assimilating field and laboratory measurements
T. Dunne, D.V. Malmon, S.M. Mudd
2010, Journal of Geophysical Research F: Earth Surface (115)
Process-based models of hillslope evolution require transport equations relating sediment flux to its major controls. An equation for rain splash transport in the absence of overland flow was constructed by modifying an approach developed by Reeve (1982) and parameterizing it with measurements from single-drop laboratory experiments and simulated rainfall on...
Recorded motions of the 6 April 2009 Mw 6.3 L'Aquila, Italy, earthquake and implications for building structural damage: Overview
M. Çelebi, P. Bazzurro, L. Chiaraluce, P. Clemente, L. Decanini, A. Desortis, W. Ellsworth, A. Gorini, E. Kalkan, S. Marcucci, G. Milana, F. Mollaioli, M. Olivieri, R. Paolucci, D. Rinaldis, A. Rovelli, F. Sabetta, C. Stephens
2010, Earthquake Spectra (26) 651-684
The normal-faulting earthquake of 6 April 2009 in the Abruzzo Region of central Italy caused heavy losses of life and substantial damage to centuriesold buildings of significant cultural importance and to modern reinforcedconcrete- framed buildings with hollow masonry infill walls. Although structural deficiencies were significant and widespread, the study of...
Geochronology and paleoclimatic implications of the last deglaciation of the Mauna Kea Ice Cap, Hawaii
Faron S. Anslow, P.U. Clark, M.D. Kurz, S. W. Hostetler
2010, Earth and Planetary Science Letters (297) 234-248
We present new 3He surface exposure ages on moraines and bedrock near the summit of Mauna Kea, Hawaii, which refine the age of the Mauna Kea Ice Cap during the Local Last Glacial Maximum (LLGM) and identify a subsequent fluctuation of the ice margin. The 3He ages, when combined with...
Factors associated with mortality of walleyes and saugers caught in live-release tournaments
Harold Schramm Jr., Bruce C. Vondracek, William E. French, Patrick D. Gerard
2010, North American Journal of Fisheries Management (30) 238-253
We measured the initial mortality (fish judged nonreleasable at weigh-in), prerelease mortality (fish judged nonreleasable 1–2 h after weigh-in [which includes initial mortality]), and postrelease mortality (fish that died during a 5-d retention in net-pens) in 14 live-release tournaments for walleye Sander vitreus conducted in April–October 2006 and April–July 2007 in lakes...
Using airborne geophysical surveys to improve groundwater resource management models
Jared D. Abraham, James C. Cannia, Steven M. Peterson, Bruce D. Smith, Burke J. Minsley, Paul A. Bedrosian
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
Increasingly, groundwater management requires more accurate hydrogeologic frameworks for groundwater models. These complex issues have created the demand for innovative approaches to data collection. In complicated terrains, groundwater modelers benefit from continuous high‐resolution geologic maps and their related hydrogeologic‐parameter estimates. The USGS and its partners have collaborated to use airborne...
New models for Paleoproterozoic orogenesis in the Cheyenne belt region: Evidence from the geology and U-Pb geochronology of the Big Creek Gneiss, southeastern Wyoming
D.S. Jones, A.W. Snoke, W. R. Premo, K.R. Chamberlain
2010, Geological Society of America Bulletin (122) 1877-1898
The disputed age of the deep crust of the Colorado Province is central to hypotheses for Paleoproterozoic crustal growth in the region. We studied the high-grade Big Creek Gneiss, southeastern Wyoming, as a potential exposure of pre-1780 Ma basement rocks. New geologic mapping and U-Pb geochronological data indicate that the...
Shallow subsurface structure of the Wasatch fault, Provo segment, Utah, from integrated compressional and shear-wave seismic reflection profiles with implications for fault structure and development
J.H. McBride, W. J. Stephenson, R. A. Williams, J. K. Odum, D. M. Worley, J.V. South, A.R. Brinkerhoff, R.W. Keach, A. O. Okojie-Ayoro
2010, Geological Society of America Bulletin (122) 1800-1814
Integrated vibroseis compressional and experimental hammer-source, shear-wave, seismic reflection profiles across the Provo segment of the Wasatch fault zone in Utah reveal near-surface and shallow bedrock structures caused by geologically recent deformation. Combining information from the seismic surveys, geologic mapping, terrain analysis, and previous seismic first-arrival modeling provides a well-constrained...
Maintenance of Eastern hemlock forests: Factors associated with hemlock vulnerability to hemlock woolly adelgid
Mary Ann Fajvan, Petra Bohall Wood
2010, Conference Paper, Proceedings from the Conference on the Ecology and Management of High-Elevation Forests in the Central and Southern Appalachian Mountains
Eastern hemlock (Tsuga canadensis [L.]) is the most shade-tolerant and long-lived tree species in eastern North America. The hemlock woolly adelgid (Adelges tsugae) (HWA), is a nonnative invasive insect that feeds on eastern hemlock and Carolina hemlock (Tsuga caroliniana Engelm.). HWA currently is established in 17 eastern states and is...
Ecosystem effects of environmental flows: Modelling and experimental floods in a dryland river
P.B. Shafroth, A.C. Wilcox, D.A. Lytle, J.T. Hickey, D.C. Andersen, Vanessa B. Beauchamp, A. Hautzinger, L.E. McMullen, A. Warner
2010, Freshwater Biology (55) 68-85
Successful environmental flow prescriptions require an accurate understanding of the linkages among flow events, geomorphic processes and biotic responses. We describe models and results from experimental flow releases associated with an environmental flow program on the Bill Williams River (BWR), Arizona, in arid to semiarid western U.S.A. Two general approaches...
Sensitivity of early life stages of freshwater mussels (Unionidae) to acute and chronic toxicity of lead, cadmium, and zinc in water
Ning Wang, Christopher G. Ingersoll, Chris D. Ivey, Douglas K. Hardesty, Thomas W. May, T. Augspurger, A.D. Roberts, E. Van Genderen, M.C. Barnhart
2010, Environmental Toxicology and Chemistry (29) 2053-2063
Toxicity of lead, cadmium, or zinc to early life stages of freshwater mussels (fatmucket, Lampsilis siliquoidea; Neosho mucket, L. rafinesqueana) was evaluated in 48‐h exposures with mussel larvae (glochidia), in 96‐h exposures with newly transformed (5‐d‐old) and two‐ or six‐month‐old juvenile mussels, or in 28‐d exposures with two‐ or four‐month‐old mussels in...
Federal land management, carbon sequestration, and climate change in the Southeastern U.S.: a case study with fort benning
S. Zhao, S. Liu, Z. Li, Terry L. Sohl
2010, Environmental Science & Technology (44) 992-997
Land use activities can have a major impact on the temporal trendsandspatialpatternsofregionalland-atmosphereexchange of carbon. Federal lands generally have substantially different land management strategies from surrounding areas, and the carbon consequences have rarely been quantified and assessed. Using the Fort Benning Installation as a case study, we used the General Ensemble...
Do competitors modulate rare plant response to precipitation change?
J.M. Levine, Mceachern A. Kathryn, C. Cowan
2010, Ecology (91) 130-140
Ecologists increasingly suspect that climate change will directly impact species physiology, demography, and phenology, but also indirectly affect these measures via changes to the surrounding community. Unfortunately, few studies examine both the direct and indirect pathways of impact. Doing so is important because altered competitive pressures can reduce or magnify...
The High Resolution Imaging Science Experiment (HiRISE) during MRO's Primary Science Phase (PSP)
Alfred S. McEwen, Maria E. Banks, Nicole Baugh, Kris J. Becker, Aaron Boyd, James W. Bergstrom, Ross A. Beyer, Edward Bortolini, Nathan T. Bridges, Shane Byrne, Bradford Castalia, Frank C. Chuang, Larry S. Crumpler, Ingrid J. Daubar, Alix K. Davatzes, Donald G. Deardorff, Alaina DeJong, W. Alan Delamere, Eldar Z. Noe Dobrea, Colin M. Dundas, Eric M. Eliason, Yisrael Espinoza, Audrie Fennema, Kathryn E. Fishbaugh, Terry Forrester, Paul E. Geissler, John A. Grant, Jennifer L. Griffes, John P. Grotzinger, Virginia C. Gulick, Candice J. Hansen, Kenneth E. Herkenhoff, Rodney Heyd, Windy L. Jaeger, Dean Jones, Bob Kanefsky, Laszlo P. Keszthelyi, Robert King, Randolph L. Kirk, Kelly J. Kolb, Jeffrey Lasco, Alexandra Lefort, Richard Leis, Kevin W. Lewis, Sara Martinez-Alonso, Sarah Mattson, Guy K. McArthur, Michael T. Mellon, Joannah Metz, Moses P. Milazzo, Ralph E. Milliken, Tahirih Motazedian, Chris Okubo, Albert Ortiz, Andrea J. Philippoff, Joseph Plassmann, Anjani Polit, Patrick S. Russell, Christian Schaller, Mindi L. Searls, Timothy Spriggs, Steve W. Squyres, Steven Tarr, Nicolas Thomas, Bradley J. Thomson, Livio L. Tornabene, Charlie Van Houten, Circe Verba, Catherine M. Weitz, James J. Wray
2010, Icarus (205) 2-37
The High Resolution Imaging Science Experiment (HiRISE) on the Mars Reconnaissance Orbiter (MRO) acquired 8 terapixels of data in 9137 images of Mars between October 2006 and December 2008, covering ∼0.55% of the surface. Images are typically 5–6 km wide with 3-color coverage over the central 20% of the swath, and their...
Nearshore concentration of pink shrimp (Farfantepenaeus duorarum) postlarvae in northern Florida bay in relation to nocturnal flood tide
Maria M. Criales, M. B. Robblee, Joan A. Browder, H. Cardenas, Thomas L. Jackson
2010, Bulletin of Marine Science (86) 53-74
We address the question of whether the low abundance of juvenile pink shrimp Farfantepenaeus duorarum (Burkenroad, 1939) in northern-central Florida Bay results from (i) limiting environmental conditions, (ii) a reduced postlarval transport, or (iii) both. To explore this question, postlarvae were collected during the new moon in both summer and...
Calibration and filtering strategies for frequency domain electromagnetic data
Burke J. Minsley, Bruce D. Smith, Richard Hammack, James I. Sams, Garret Veloski
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
echniques for processing frequency-domain electromagnetic (FDEM) data that address systematic instrument errors and random noise are presented, improving the ability to invert these data for meaningful earth models that can be quantitatively interpreted. A least-squares calibration method, originally developed for airborne electromagnetic datasets, is implemented for a ground-based survey in...
Vulnerability of deep groundwater in the Bengal Aquifer System to contamination by arsenic
W.G. Burgess, M.A. Hoque, H.A. Michael, C.I. Voss, G. N. Breit, K.M. Ahmed
2010, Nature Geoscience (3) 83-87
Shallow groundwater, the primary water source in the Bengal Basin, contains up to 100 times the World Health Organization (WHO) drinking-water guideline of 10g l 1 arsenic (As), threatening the health of 70 million people. Groundwater from a depth greater than 150m, which almost uniformly meets the WHO guideline, has...
Bacteria holding times for fecal coliform by mFC agar method and total coliform and Escherichia coli by Colilert®-18 Quanti-Tray® method
Brent T. Aulenbach
2010, Environmental Monitoring and Assessment (161) 147-159
Bacteria holding-time experiments of up to 62 h were performed on five surface-water samples from four urban stream sites in the vicinity of Atlanta, GA, USA that had relatively high densities of coliform bacteria (Escherichia coli densities were all well above the US Environmental Protection Agency criterion of 126 colonies...
