High-frequency Born synthetic seismograms based on coupled normal modes
Fred F. Pollitz
2011, Geophysical Journal International (187) 1420-1442
High-frequency and full waveform synthetic seismograms on a 3-D laterally heterogeneous earth model are simulated using the theory of coupled normal modes. The set of coupled integral equations that describe the 3-D response are simplified into a set of uncoupled integral equations by using the Born approximation to calculate scattered...
Comparison of visual-based helicopter and fixed-wing forward-looking infrared surveys for counting white-tailed deer Odocoileus virginianus
Daniel J. Storm, Michael D. Samuel, Timothy R. Van Deelen, Karl D. Malcolm, Robert E. Rolley, Nancy A. Frost, Donald P. Bates, Bryan J. Richards
2011, Wildlife Biology (17) 431-440
Aerial surveys using direct counts of animals are commonly used to estimate deer abundance. Forward-looking infrared (FLIR) technology is increasingly replacing traditional methods such as visual observation from helicopters. Our goals were to compare fixed-wing FLIR and visual, helicopter-based counts in terms of relative bias, influence of snow cover and...
Effects of acid deposition on ecosystems: Advances in the state of the science
Douglas A. Burns, Mark E. Fenn, Jill Baron
2011, Report, National Acid Precipitation Assessment Program Report to Congress: An Integrated Assessment
Chapter 2 focused on the environmental results of the ARP, presenting data from national monitoring networks on SO2 and NOx emissions, air quality, atmospheric deposition, surface water chemistry, and visibility. This chapter expands on this information by examining the most recent research into how ecosystems respond to acid deposition, especially...
Value of a dual-polarized gap-filling radar in support of southern California post-fire debris-flow warnings
David P. Jorgensen, Maiana N. Hanshaw, Kevin M. Schmidt, Jayme L. Laber, Dennis M. Staley, Jason W. Kean, Pedro J. Restrepo
2011, Journal of Hydrometeorology (12) 1581-1595
A portable truck-mounted C-band Doppler weather radar was deployed to observe rainfall over the Station Fire burn area near Los Angeles, California, during the winter of 2009/10 to assist with debris-flow warning decisions. The deployments were a component of a joint NOAA–U.S. Geological Survey (USGS) research effort to improve definition...
Aquaculture drugs: drug approval research on 17 a-methyltestosterone (official transfer to 17 a-Methyltestosterone (MT) analytical method for feed)
Mark Gaikowski, Nilmini Wijewickreme
2011, Report
The role of adsorbed water on the friction of a layer of submicron particles
Charles G. Sammis, David A. Lockner, Ze’ev Reches
2011, Pure and Applied Geophysics (168) 2325-2334
Anomalously low values of friction observed in layers of submicron particles deformed in simple shear at high slip velocities are explained as the consequence of a one nanometer thick layer of water adsorbed on the particles. The observed transition from normal friction with an apparent coefficient near μ = 0.6...
Silver bioaccumulation dynamics in a freshwater invertebrate after aqueous and dietary exposures to nanosized and ionic Ag
Marie-Noe le Croteau, Superb K. Misra, Samuel N. Luoma, Eugenia Valsami-Jones
2011, Environmental Science & Technology (45) 6600-6607
We compared silver (Ag) bioavailability and toxicity to a freshwater gastropod after exposure to ionic silver (Ag+) and to Ag nanoparticles (Ag NPs) capped with citrate or with humic acid. Silver form, exposure route, and capping agent influence Ag bioaccumulation dynamics in Lymnaea stagnalis. Snails efficiently accumulated Ag from all...
The distributions of one invasive and two native crayfishes in relation to coarse-scale natural and anthropogenic factors
Jacob T. Westhoff, C.F. Rabeni, S.P. Sowa
2011, Freshwater Biology (56) 2415-2431
1. Native crayfishes are often extirpated from portions of their range because of interactions with invasive species, anthropogenic alterations to environmental conditions or a combination of these factors. Our goal was to identify coarse-scale natural and anthropogenic factors related to the current distributions of the invasive crayfish, Orconectes hylas, and two...
Vulnerability of high-latitude soil organic carbon in North America to disturbance
Guido Grosse, Jennifer W. Harden, Merritt Turetsky, A. David McGuire, Philip Camill, Charles Tarnocai, Steve Frolking, Edward A.G. Schuur, Torre Jorgenson, Sergei Marchenko, Vladimir Romanovsky, Kimberly P. Wickland, Nancy French, Mark P. Waldrop, Laura L. Bourgeau-Chavez, Robert G. Striegl
2011, Journal of Geophysical Research G: Biogeosciences (116) 1-23
This synthesis addresses the vulnerability of the North American high-latitude soil organic carbon (SOC) pool to climate change. Disturbances caused by climate warming in arctic, subarctic, and boreal environments can result in significant redistribution of C among major reservoirs with potential global impacts. We divide the current northern high-latitude SOC...
Migration delays caused by anthropogenic barriers: modeling dams, temperature, and success on migrating salmon smolts
Elizabeth A. Marschall, Martha E. Mather, Donna L. Parrish, Gary W. Allison, James R. McMenemy
2011, Ecological Applications (21) 3014-3031
Disruption to migration is a growing problem for conservation and restoration of animal populations. Anthropogenic barriers along migration paths can delay or prolong migrations, which may result in a mismatch with migration-timing adaptations. To understand the interaction of dams (as barriers along a migration path), seasonally changing environmental conditions, timing...
Oil sands
Debra K. Higley, F. J. Hein
2011, Natural Resources Research (20) 306-309
No abstract available....
Mineral Commodity Summaries 2011
Water Resources Division, U.S. Geological Survey
2011, Mineral Commodity Summaries 2011
Each chapter of the 2011 edition of the U.S. Geological Survey (USGS) Mineral Commodity Summaries (MCS) includes information on events, trends, and issues for each mineral commodity as well as discussions and tabular presentations on domestic industry structure, Government programs, tariffs, 5-year salient statistics, and world production and resources. The...
The source, discharge, and chemical characteristics of water from Agua Caliente Spring, Palm Springs, California
Justin Brandt, Rufus D. Catchings, Allen H. Christensen, Alan L. Flint, Gini Gandhok, Mark R. Goldman, Keith J. Halford, Victoria E. Langenheim, Peter Martin, Michael J. Rymer, Roy A. Schroeder, Gregory A. Smith, Michelle Sneed
Peter Martin, editor(s)
2011, Scientific Investigations Report 2011-5156
Agua Caliente Spring, in downtown Palm Springs, California, has been used for recreation and medicinal therapy for hundreds of years and currently (2008) is the source of hot water for the Spa Resort owned by the Agua Caliente Band of the Cahuilla Indians. The Agua Caliente Spring is located about...
Catalog of earthquake hypocenters at Alaskan volcanoes: January 1 through December 31, 2010
James P. Dixon, Scott D. Stihler, John A. Power, Cheryl K. Searcy
2011, Data Series 645
Between January 1 and December 31, 2010, the Alaska Volcano Observatory (AVO) located 3,405 earthquakes, of which 2,846 occurred within 20 kilometers of the 33 volcanoes with seismograph subnetworks. There was no significant seismic activity in 2010 at these monitored volcanic centers. Seismograph subnetworks with severe outages in 2009 were...
Sediment concentrations, loads, and particle-size distributions in the Red River of the North and selected tributaries near Fargo, North Dakota, during the 2011 spring high-flow event
Joel M. Galloway, Robert A. Blanchard, Christopher A. Ellison
2011, Scientific Investigations Report 2011-5134
To provide accurate and reliable information on sediment near the Fargo-Moorhead metropolitan area, the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers conducted a study in the spring (March-May) of 2010 and the spring of 2011 to examine sediment concentrations, loads, and particle-size distributions at nine...
Food webs and fishing affect parasitism of the sea urchin Eucidaris galapagensis in the Galápagos
Jorge I. Sonnenholzner, Kevin D. Lafferty, Lydia B. Ladah
2011, Ecology (92) 2276-2284
In the Galápagos Islands, two eulimid snails parasitize the common pencil sea urchin, Eucidaris galapagensis. Past work in the Galápagos suggests that fishing reduces lobster and fish densities and, due to this relaxation of predation pressure, indirectly increases urchin densities, creating the potential for complex indirect interactions between fishing and...
Female American Kestrel survives double amputation
Ben R. Skipper, Clint W. Boal
2011, Journal of Raptor Research (45) 374-375
Free-ranging raptors are susceptible to a variety of injuries, many of which are sustained while pursuing and/or capturing live prey. Injuries hindering an individual’s ability to capture prey, such as partial blindness, damage to the bill, and foot or leg injuries, are debilitating and potentially life-threatening. However, there are ample...
Efficacy of fipronil for control of yellowjacket wasps in Hawaii Volcanoes National Park
David Foote, Cause Hanna, Cynthia King, Eric Spurr
2011, Technical Report HCSU-028
The western yellowjacket wasp (Vespula pensylvanica) invaded Hawai`i’s national parks and refuges following its spread throughout the islands in the late 1970s. The endemic arthropod fauna of Hawai`i is thought to be especially vulnerable to these predacious social Hymenoptera, and methods of wasp control have been a priority for conservation...
Hydrologic conditions and terrestrial laser scanning of post-firedebris flows in the San Gabriel Mountains, CA, U.S.A
K. M. Schmidt, M. N. Hanshaw, J. F. Howle, J. W. Kean, Dennis M. Staley, J. D. Stock, W. Bawdeng
2011, Italian Journal of Engineering Geology and Environment 583-593
To investigate rainfall-runoff conditions that generate post-wildfire debris flows, we instrumented and surveyed steep, small watersheds along the tectonically active front of the San Gabriel Mountains, California. Fortuitously, we recorded runoff-generated debris-flows triggered by one spatially restricted convective event with 28 mm of rainfall falling over 62 minutes. Our rain...
Endogenous contributions to egg protein formation in lesser scaup Aythya affinis
Kyle A. Cutting, Keith A. Hobson, Jay J. Rotella, Jeffrey M. Warren, Susan E. Wainwright-de la Cruz, John Y. Takekawa
2011, Journal of Avian Biology (42) 505-513
Lesser scaup Aythya affinis populations have declined throughout the North American continent for the last three decades. It has been hypothesized that the loss and degradation of staging habitats has resulted in reduced female body condition on the breeding grounds and a concomitant decline in productivity. We explored the importance...
An empirical method to forecast the effect of storm intensity on shallow landslide abundance
Jonathan D. Stock, Dino Bellugi
2011, Italian Journal of Engineering Geology and Environment 1013-1022
We hypothesize that the number of shallow landslides a storm triggers in a landscape increases with rainfall intensity, duration and the number of unstable model cells for a given shallow landslide susceptibility model of that landscape. For selected areas in California, USA, we use digital maps of historic shallow landslides...
Programming PHREEQC calculations with C++ and Python a comparative study
Scott R. Charlton, David L. Parkhurst, Mike Muller
2011, Conference Paper, Proceedings for MODFLOW and More 2011: Integrated Hydrologic Modeling
The new IPhreeqc module provides an application programming interface (API) to facilitate coupling of other codes with the U.S. Geological Survey geochemical model PHREEQC. Traditionally, loose coupling of PHREEQC with other applications required methods to create PHREEQC input files, start external PHREEQC processes, and process PHREEQC output files. IPhreeqc eliminates...
Analysis of the deconstruction of Dyke Marsh, George Washington Memorial Parkway, Virginia-Progression, geologic and manmade causes, and effective restoration scenarios
Ronald J. Litwin, Joseph P. Smoot, Milan J. Pavich, Helaine W. Markewich, Erik Oberg, Ben Helwig, Brent Steury, Vincent L. Santucci, Nancy J. Durika, Nancy B. Rybicki, Katharina M. Engelhardt, Geoffrey Sanders, Stacey Verardo, Andrew J. Elmore, Joseph Gilmer
2011, Open-File Report 2010-1269
This report is a synthesis of the latest findings from an ongoing study of Dyke Marsh, an eroding freshwater tidal wetland that is scheduled for federal restoration. Its purpose is to provide an accurate and up-to-date temporal and geological framework for the marsh, of which most is new information (plus...
Digital Mapping Techniques '09-workshop proceedings, Morgantown, West Virginia, May 10-13, 2009
David R. Soller
2011, Open-File Report 2010-1335
The Digital Mapping Techniques '09 (DMT'09) workshop was attended by 90 technical experts from 42 agencies, universities, and private companies, including representatives from 24 State geological surveys. This workshop, the thirteenth in the annual series, was hosted by the West Virginia Geological and Economic Survey, May 10-13, 2009, on the...
Hydraulic characteristics of low-impact development practices in northeastern Ohio, 2008–2010
Robert A. Darner, Denise H. Dumouchelle
2011, Scientific Investigations Report 2011-5165
Low-impact development (LID) is an approach to managing stormwater as near to its source as possible; this is accomplished by minimizing impervious surfaces and promoting more natural infiltration and evapotranspiration than is typically associated with developed areas. Two newly constructed LID sites in northeastern Ohio were studied to document their...
