Periodic, chaotic, and doubled earthquake recurrence intervals on the deep San Andreas Fault
David R. Shelly
2010, Science (328) 1385-1388
Earthquake recurrence histories may provide clues to the timing of future events, but long intervals between large events obscure full recurrence variability. In contrast, small earthquakes occur frequently, and recurrence intervals are quantifiable on a much shorter time scale. In this work, I examine an 8.5-year sequence of more than...
Source and fate of inorganic solutes in the Gibbon River, Yellowstone National Park, Wyoming, USA: I. Low-flow discharge and major solute chemistry
R. Blaine McCleskey, D. Kirk Nordstrom, David D. Susong, James W. Ball, JoAnn M. Holloway
2010, Journal of Volcanology and Geothermal Research (193) 189-202
The Gibbon River in Yellowstone National Park (YNP) is an important natural resource and habitat for fisheries and wildlife. However, the Gibbon River differs from most other mountain rivers because its chemistry is affected by several geothermal sources including Norris Geyser Basin, Chocolate Pots, Gibbon Geyser Basin, Beryl Spring, and...
When parasites become prey: ecological and epidemiological significance of eating parasites
Pieter T.J. Johnson, Andrew P. Dobson, Kevin D. Lafferty, David J. Marcogliese, Jane Memmott, Sarah A. Orlofske, Robert Poulin, David W. Thieltges
2010, Trends in Ecology and Evolution (25) 362-371
Recent efforts to include parasites in food webs have drawn attention to a previously ignored facet of foraging ecology: parasites commonly function as prey within ecosystems. Because of the high productivity of parasites, their unique nutritional composition and their pathogenicity in hosts, their consumption affects both food-web topology and disease...
PCB exposure in sea otters and harlequin ducks in relation to history of contamination by the Exxon Valdez oil spill
Mark A. Ricca, A. Keith Miles, Brenda E. Ballachey, James L. Bodkin, Daniel Esler, Kimberly A. Trust
2010, Marine Pollution Bulletin (60) 861-872
Exposure to contaminants other than petroleum hydrocarbons could confound interpretation of Exxon Valdez oil spill effects on biota at Prince William Sound, Alaska. Hence, we investigated polychlorinated biphenyls (PCBs) in blood of sea otters and harlequin ducks sampled during 1998. PCB concentrations characterized by lower chlorinated congeners were highest in...
Locations and magnitudes of historical earthquakes in the Sierra of Ecuador (1587–1996)
Celine Beauval, Hugo Yepes, William H. Bakun, Jose Egred, Alexandra Alvarado, Juan-Carlos Singaucho
2010, Geophysical Journal International (181) 1613-1633
The whole territory of Ecuador is exposed to seismic hazard. Great earthquakes can occur in the subduction zone (e.g. Esmeraldas, 1906, Mw8.8), whereas lower magnitude but shallower and potentially more destructive earthquakes can occur in the highlands. This study focuses on the historical crustal earthquakes of the Andean Cordillera. Several large...
Geologic map of Lake Mead and surrounding regions, southern Nevada, southwestern Utah, and northwestern Arizona
Tracey J. Felger, Sue Beard
2010, GSA Special Papers (463) 29-39
Regional stratigraphic units and structural features of the Lake Mead region are presented as a 1:250,000 scale map, and as a Geographic Information System database. The map, which was compiled from existing geologic maps of various scales, depicts geologic units, bedding and foliation attitudes, faults and folds. Units and structural...
Comparison of turbidity to multi-frequency sideways-looking acoustic-Doppler data and suspended-sediment data in the Colorado River in Grand Canyon
Nicholas Voichick, David J. Topping
2010, Conference Paper, Proceedings of the Joint Federal Interagency Conference 2010: Hydrology and sedimentation for a changing future: existing and emerging issues
Water clarity is important to biologists when studying fish and other fluvial fauna and flora. Turbidity is an indicator of the cloudiness of water, or reduced water clarity, and is commonly measured using nephelometric sensors that record the scattering and absorption of light by particles in the water. Unfortunately, nephelometric...
Conservation genetics of the alligator snapping turtle: cytonuclear evidence of range-wide bottleneck effects and unusually pronounced geographic structure
A.A. Echelle, J.C. Hackler, Justin B. Lack, S. R. Ballard, J. Roman, S. F. Fox, David M. Leslie Jr., Ronald A. Van Den Bussche
2010, Conservation Genetics (11) 1375-1387
A previous mtDNA study indicated that female-mediated gene flow was extremely rare among alligator snapping turtle populations in different drainages of the Gulf of Mexico. In this study, we used variation at seven microsatellite DNA loci to assess the possibility of male-mediated gene flow, we augmented the mtDNA survey with...
Establishment and partial characterization of a cell line from burbot Lota lota maculosa: susceptibility to IHNV, IPNV and VHSV.
William N. Batts, Mark P. Polinski, John D. Drennan, Susan C. Ireland, Kenneth D. Cain
2010, Diseases of Aquatic Organisms (90) 15-23
This study describes the development and partial characterization of a continuous fibroblastic-like cell line (BEF-1) developed from late stage embryos of North American burbot Lota lota maculosa. This cell line has been maintained for over 5 yr and 100 passages in vitro. Cells were cultured using Eagle’s minimum essential medium...
Patch dynamics and the timing of colonization-abandonment events by male Kirtland’s Warblers in an early succession habitat
Deahn M. Donner, Christine Ribic, John R. Probst
2010, Biological Conservation (143) 1159-1167
Habitat colonization and abandonment affects the distribution of a species in space and time, ultimately influencing the duration of time habitat is used and the total area of habitat occupied in any given year. Both aspects have important implications to long-term conservation planning. The importance of patch isolation and area...
Coalbed methane resources of the Appalachian Basin, eastern USA
Robert C. Milici, Joseph R. Hatch, Mark J. Pawlewicz
2010, International Journal of Coal Geology (82) 160-174
In 2002, the U.S. Geological Survey (USGS) assessed the technically recoverable, undiscovered coalbed-gas resources in the Appalachian basin and Black Warrior basin Assessment Provinces as about 15.5 trillion cubic feet. Although these resources are almost equally divided between the two areas, most of the production occurs within relatively small areas...
A comparison of methods for estimating open-water evaporation in small wetlands
Jason R. Masoner, David I. Stannard
2010, Wetlands (30) 513-524
We compared evaporation measurements from a floating pan, land pan, chamber, and the Priestley-Taylor (PT) equation. Floating pan, land pan, and meteorological data were collected from June 6 to July 21, 2005, at a small wetland in the Canadian River alluvium in central Oklahoma, USA. Evaporation measured with the floating...
Taqman Real-Time PCR Detects Avipoxvirus DNA in Blood of Hawaìi `Amakihi (Hemignathus virens)
Margaret E.M. Farias, Dennis LaPointe, C. T. Atkinson, Christopher Czerwonka, Rajesh Shrestha, Susan I. Jarvi
2010, PLoS ONE (5) 1-6
Background Avipoxvirus sp. is a significant threat to endemic bird populations on several groups of islands worldwide, including Hawaìi, the Galapagos Islands, and the Canary Islands. Accurate identification and genotyping of Avipoxvirus is critical to the study of this disease and how it interacts with other pathogens, but currently available methods rely on invasive...
The construction of Chasma Boreale on Mars
J.W. Holt, Kathryn E. Fishbaugh, S. Byrne, S. Christian, Kenneth L. Tanaka, P.S. Russell, Kenneth E. Herkenhoff, A. Safaeinili, Nathaniel E. Putzig, R.J. Phillips
2010, Nature (465) 446-449
The polar layered deposits of Mars contain the planet’s largest known reservoir of water ice1,2 and the prospect of revealing a detailed Martian palaeoclimate record3,4, but the mechanisms responsible for the formation of the dominant features of the north polar layered deposits (NPLD) are unclear, despite decades of debate. Stratigraphic analyses...
Bayesian estimation of weak material dispersion: Theory and experiment
J.M. Nichols, M. Currie, F. Bucholtz, William A. Link
2010, Optics Express (18) 2076-2089
This work considers the estimation of dispersion in materials via an interferometric technique. At its core, the problem involves extracting the quadratic variation in phase over a range of wavelengths based on measured optical intensity. The estimation problem becomes extremely difficult for weakly dispersive materials where the quadratic nonlinearity is...
Comparative analysis of Mourning Dove population change in North America
John R. Sauer, William A. Link, William L. Kendall, David D. Dolton
2010, Journal of Wildlife Management (74) 1059-1069
Mourning doves (Zenaida macroura) are surveyed in North America with a Call-Count Survey (CCS) and the North American Breeding Bird Survey (BBS). Analyses in recent years have identified inconsistencies in results between surveys, and a need exists to analyze the surveys using modern methods and examine possible causes of differences...
Gulf of Mexico dead zone - 1000 year record
L.E. Osterman, R.Z. Poore, P.W. Swarzenski
2010, Open-File Report 2008-1099
An area of oxygen-depleted bottom- and subsurfacewater (hypoxia = dissolved oxygen < 2 mg per Liter) occurs seasonally on the Louisiana shelf near the Mississippi River. The area of hypoxia, also known as the 'dead zone,' forms when spring and early summer freshwater flow from the Mississippi River supplies a...
Biological, Physical and Chemical Data From Gulf of Mexico Gravity and Box Core MRD05-04
Lisa E. Osterman, Pamela L. Campbell, Peter W. Swarzenski, John P. Ricardo
2010, Open-File Report 2007-1024
This paper presents the benthic foraminiferal census data, magnetic susceptibility measurements, vanadium and organic geochemistry (carbon isotope, sterols, and total organic carbon) data from the MRD05-04 gravity and box cores. The MRD05-04 cores were obtained from the Louisiana continental shelf in an on-going initiative to examine the geographic and temporal...
Biological, Physical, And Chemical Data From Gulf of Mexico Core PE0305-GC1
Lisa E. Osterman, Peter W. Swarzenski, David Hollander
2010, Open-File Report 2006-1012
This paper presents benthic foraminiferal census data, and magnetic susceptibility, 210Pb , radiocarbon, and geochemical measurements from gravity core PE0305-GC1 (=GC1). Core GC1 was collected from the Louisiana continental shelf as part of an initiative to investigate the geographic and temporal extent of hypoxia, low-oxygen water, in the Gulf of...
Soil geochemical data for the Wyoming Landscape Conservation Initiative study area
David B. Smith, Karl J. Ellefsen
2010, Data Series 510
In 2008, soil samples were collected at 139 sites throughout the Wyoming Landscape Conservation Initiative study area in southwest Wyoming. These samples, representing a density of 1 site per 440 square kilometers, were collected from a depth of 0-5 cm and analyzed for a suite of more than 40 major...
USGS Toxic Substances Hydrology Program, 2010
Herbert T. Buxton
2010, Fact Sheet 2010-3011
The U.S. Geological Survey (USGS) Toxic Substances Hydrology Program adapts research priorities to address the most important contamination issues facing the Nation and to identify new threats to environmental health. The Program investigates two major types of contamination problems: * Subsurface Point-Source Contamination, and * Watershed and Regional Contamination. Research...
Changes in groundwater flow and volatile organic compound concentrations at the Fischer and Porter Superfund Site, Warminster Township, Bucks County, Pennsylvania, 1993-2009
Ronald A. Sloto
2010, Scientific Investigations Report 2010-5054
The 38-acre Fischer and Porter Company Superfund Site is in Warminster Township, Bucks County, Pa. Historically, as part of the manufacturing process, trichloroethylene (TCE) degreasers were used for parts cleaning. In 1979, the Bucks County Health Department detected TCE and other volatile organic compounds (VOCs) in water from the Fischer...
The upper crust on its side---Steeply tilted slabs in the basin and range
Keith A. Howard
2010, Conference Paper, Great Basin evolution and metallogeny: Geological Society of Nevada, 2010 Symposium
No abstract available....
Quality of Source Water from Public-Supply Wells in the United States, 1993-2007
Patricia L. Toccalino, Julia E. Norman, Kerie J. Hitt
2010, Scientific Investigations Report 2010-5024
More than one-third of the Nation's population receives their drinking water from public water systems that use groundwater as their source. The U.S. Geological Survey (USGS) sampled untreated source water from 932 public-supply wells, hereafter referred to as public wells, as part of multiple groundwater assessments conducted across the Nation...
The quality of our Nation’s waters: Quality of water from public-supply wells in the United States, 1993–2007: Overview of major findings
Patricia L. Toccalino, Jessica A. Hopple
2010, Circular 1346
Summary of Major Findings and Implications About 105 million people in the United States-more than one-third of the Nation's population-receive their drinking water from about 140,000 public water systems that use groundwater as their source. Although the quality of finished drinking water (after treatment and before distribution) from these public water...
