Geomorphology, denudation rates, and stream channel profiles reveal patterns of mountain building adjacent to the San Andreas fault in northern California, USA
Stephen B. DeLong, George E. Hilley, Carol S. Prentice, Christopher J. Crosby, Intan N. Yokelson
2017, GSA Bulletin (129) 732-749
Relative horizontal motion along strike-slip faults can build mountains when motion is oblique to the trend of the strike-slip boundary. The resulting contraction and uplift pose off-fault seismic hazards, which are often difficult to detect because of the poor vertical resolution of satellite geodesy and difficulty of locating offset datable...
Identification of two novel reassortant avian influenza a (H5N6) viruses in whooper swans in Korea, 2016
Jipseol Jeong, Chanjin Woo, S. Ip, Injung An, Youngsik Kim, Kwanghee Lee, Seong-Deok Jo, Kidong Son, Saemi Lee, Jae-Ku Oem, Seung-Jun Wang, Yongkwan Kim, Jeonghwa Shin, Jonathan M. Sleeman, Weonhwa Jheong
2017, Virology Journal (14)
BackgroundOn November 20, 2016 two novel strains of H5N6 highly pathogenic avian influenza virus (HPAIVs) were isolated from three whooper swans (Cygnus cygnus) at Gangjin Bay in South Jeolla province, South Korea. Identification of HPAIVs in wild birds is significant as there is a...
Low stress drops observed for aftershocks of the 2011 Mw 5.7 Prague, Oklahoma, earthquake
Danielle F. Sumy, Corrie J. Neighbors, Elizabeth S. Cochran, Katie M. Keranen
2017, Journal of Geophysical Research B: Solid Earth (122) 3813-3834
In November 2011, three Mw ≥ 4.8 earthquakes and thousands of aftershocks occurred along the structurally complex Wilzetta fault system near Prague, Oklahoma. Previous studies suggest that wastewater injection induced a Mw 4.8 foreshock, which subsequently triggered a Mw 5.7 mainshock. We examine source properties of aftershocks with a standard Brune-type spectral model and jointly solve for...
White-cheeked Pintail duckling and brood survival across wetland types at Humacao Nature Reserve, Puerto Rico
J. Brian Davis, Francisco Vilella, Joseph D. Lancaster, Marisel Lopez-Flores, Richard M. Kaminski, Jose A. Cruz-Burgos
2017, Condor (119) 308-320
Duckling survival is an important influence on recruitment in several North American Anas species. White-cheeked Pintail (Anas bahamensis) breeding in Puerto Rico encounter a variety of wetland types that may influence duckling survival. We monitored fates of 92 radio-tagged ducklings in 31 broods in 5 wetland habitat types at Humacao...
Mercury
Charles N. Alpers
2017, Book chapter, Encyclopedia of geochemistry
No abstract available....
Automatic mapping of the base of aquifer — A case study from Morrill, Nebraska
Mats Lundh Gulbrandsen, Lyndsay B. Ball, Burke J. Minsley, Thomas Mejer Hansen
2017, Interpretation (5) T231-T241
When a geologist sets up a geologic model, various types of disparate information may be available, such as exposures, boreholes, and (or) geophysical data. In recent years, the amount of geophysical data available has been increasing, a trend that is only expected to continue. It is nontrivial (and often, in...
Diagenetic silica enrichment and late-stage groundwater activity in Gale crater, Mars
Jens Frydenvang, Patrick J. Gasda, Joel A. Hurowitz, John P. Grotzinger, Roger C. Wiens, Horton E. Newsom, Ken S. Edgett, Jessica Watkins, John C. Bridges, Sylvestre Maurice, Martin R. Fisk, Jeffrey R. Johnson, William Rapin, Nathan Stein, Sam M. Clegg, S. P. Schwenzer, C. Bedford, P. Edwards, Nicolas Mangold, Agnes Cousin, Ryan B. Anderson, Valerie Payre, David Vaniman, David Blake, Nina L. Lanza, Sanjeev Gupta, Jason K. Van Beek, Violaine Sautter, Pierre-Yves Meslin, Melissa Rice, Ralf Milliken, Ralf Gellert, Lucy Thompson, Ben C. Clark, Dawn Y. Sumner, Abigail A. Fraeman, Kjartan M Kinch, Morten B. Madsen, Igor Mitofranov, Insoo Jun, Fred J. Calef, Ashwin R. Vasavada
2017, Geophysical Research Letters (44) 4716-4724
Diagenetic silica enrichment in fracture-associated halos that crosscut lacustrine and unconformably overlying aeolian sedimentary bedrock is observed on the lower north slope of Aeolis Mons in Gale crater, Mars. The diagenetic silica enrichment is colocated with detrital silica enrichment observed in the lacustrine bedrock yet extends into a considerably younger,...
A dynamic spatio-temporal model for spatial data
Trevor J. Hefley, Mevin Hooten, Ephraim M. Hanks, Robin Russell, Daniel P. Walsh
2017, Spatial Statistics (20) 206-220
Analyzing spatial data often requires modeling dependencies created by a dynamic spatio-temporal data generating process. In many applications, a generalized linear mixed model (GLMM) is used with a random effect to account for spatial dependence and to provide optimal spatial predictions. Location-specific covariates are often included as fixed effects in...
Global Positioning System data collection, processing, and analysis conducted by the U.S. Geological Survey Earthquake Hazards Program
Jessica R. Murray, Jerry L. Svarc
2017, Seismological Research Letters (88) 916-925
The U.S. Geological Survey Earthquake Science Center collects and processes Global Positioning System (GPS) data throughout the western United States to measure crustal deformation related to earthquakes and tectonic processes as part of a long‐term program of research and monitoring. Here, we outline data collection procedures and present the GPS...
Achieving full connectivity of sites in the multiperiod reserve network design problem
Nahid Jafari, Bryan L. Nuse, Clinton T. Moore, Bistra Dilkina, Jeffrey Hepinstall-Cymerman
2017, Computers & Operations Research (81) 119-127
The conservation reserve design problem is a challenge to solve because of the spatial and temporal nature of the problem, uncertainties in the decision process, and the possibility of alternative conservation actions for any given land parcel. Conservation agencies tasked with reserve design may benefit from a dynamic decision system...
Cascadia subduction tremor muted by crustal faults
Ray E. Wells, Richard J. Blakely, Aaron G. Wech, Patricia A. McCrory, Andrew Michael
2017, Geology (45) 515-518
Deep, episodic slow slip on the Cascadia subduction megathrust of western North America is accompanied by low-frequency tremor in a zone of high fluid pressure between 30 and 40 km depth. Tremor density (tremor epicenters per square kilometer) varies along strike, and lower tremor density statistically correlates with upper plate...
Datasheet: Pseudogymnoascus destructans (white-nose syndrome fungus)
David S. Blehert, Emily W. Lankau
2017, Book chapter, Invasive species compendium
Pseudogymnoascus destructans is a psychrophilic (cold-loving) fungus that causes white-nose syndrome (WNS), an emerging disease of North American bats that has caused unprecedented population declines. The fungus is believed to have been introduced to North America from Europe or Asia (where it is present but does not cause significant mortality),...
Cessation of oil exposure in harlequin ducks after the Exxon Valdez oil spill: Cytochrome P4501A biomarker evidence
Daniel Esler, Brenda E. Ballachey, Lizabeth Bowen, A. Keith Miles, Rian D. Dickson, John D. Henderson
2017, Environmental Toxicology and Chemistry (36) 1294-1300
The authors quantified hepatic hydrocarbon-inducible cytochrome P4501A (CYP1A) expression, as ethoxyresorufin-O-deethylase (EROD) activity, in wintering harlequin ducks (Histrionicus histrionicus) captured in Prince William Sound, Alaska (USA), during 2011, 2013, and 2014 (22–25 yr following the 1989 Exxon Valdez oil spill). Average EROD activity was compared between birds from areas oiled...
Experimental evaluation of four ground-motion scaling methods for dynamic response-history analysis of nonlinear structures
Andrew P. O’Donnell, Yahya C. Kurama, Erol Kalkan, Alexandros A. Taflanidis
2017, Bulletin of Earthquake Engineering (15) 1899-1924
This paper experimentally evaluates four methods to scale earthquake ground-motions within an ensemble of records to minimize the statistical dispersion and maximize the accuracy in the dynamic peak roof drift demand and peak inter-story drift demand estimates from response-history analyses of nonlinear building structures. The scaling methods that are investigated...
Advancing coastal ocean modelling, analysis, and prediction for the US Integrated Ocean Observing System
John L. Wilkin, Leslie Rosenfeld, Arthur Allen, Rebecca Baltes, Antonio Baptista, Ruoying He, Patrick Hogan, Alexander Kurapov, Avichal Mehra, Josie Quintrell, David Schwab, Richard P. Signell, Jane Smith
2017, Journal of Operational Oceanography (10) 115-126
This paper outlines strategies that would advance coastal ocean modelling, analysis and prediction as a complement to the observing and data management activities of the coastal components of the US Integrated Ocean Observing System (IOOS®) and the Global Ocean Observing System (GOOS). The views presented are the consensus of a...
Effect of substrate size on sympatric sand darter benthic habitat preferences
Patricia A. Thompson, Stuart A. Welsh, Austin A. Rizzo, Dustin M. Smith
2017, Journal of Freshwater Ecology (32) 455-465
The western sand darter, Ammocrypta clara, and the eastern sand darter, A. pellucida, are sand-dwelling fishes that have undergone range-wide population declines, presumably owing to habitat loss. Habitat use studies have been conducted for the eastern sand darter, but literature on the western sand darter remains sparse. To evaluate substrate...
Fall and winter survival of brook trout and brown trout in a north-central Pennsylvania watershed
John A. Sweka, Lori A. Davis, Tyler Wagner
2017, Transactions of the American Fisheries Society (146) 744-752
Stream-dwelling salmonids that spawn in the fall generally experience their lowest survival during the fall and winter due to behavioral changes associated with spawning and energetic deficiencies during this time of year. We used data from Brook Trout Salvelinus fontinalis and Brown Trout Salmo trutta implanted with radio transmitters in...
Matching watershed and otolith chemistry to establish natal origin of an endangered desert lake sucker
Deanna D. Strohm, Phaedra E. Budy, Todd A. Crowl
2017, Transactions of the American Fisheries Society (146) 732-743
Stream habitat restoration and supplemental stocking of hatchery-reared fish have increasingly become key components of recovery plans for imperiled freshwater fish; however, determining when to discontinue stocking efforts, prioritizing restoration areas, and evaluating restoration success present a conservation challenge. In this study, we demonstrate that otolith microchemistry is an effective...
Managing the livestock– Wildlife interface on rangelands
Johan T. du Toit, Paul C. Cross, Marion Valeix
2017, Book chapter, Rangeland Systems
On rangelands the livestock–wildlife interface is mostly characterized by management actions aimed at controlling problems associated with competition, disease, and depredation. Wildlife communities (especially the large vertebrate species) are typically incompatible with agricultural development because the opportunity costs of wildlife conservation are unaffordable except in arid and semi-arid regions. Ecological...
The history of mercury pollution near the Spolana chlor-alkali plant (Neratovice, Czech Republic) as recorded by Scots pine tree rings and other bioindicators
Tomáš Navrátil, Martin Simecek, James B. Shanley, Jan Rohovec, Maria Hojdova, Jakub Houska
2017, Science of the Total Environment (586) 1192
We assessed > 100 years of mercury (Hg) pollution recorded in the tree rings of Scots Pine near a Czech chlor-alkali plant operating since 1941. Hg concentrations in tree rings increased with the launching of plant operations and decreased when Hg emissions decreased in 1975 due to an upgrade in production technology....
The California Earthquake Advisory Plan: A history
Evelyn A. Roeloffs, James D. Goltz
2017, Seismological Research Letters (88) 784-797
Since 1985, the California Office of Emergency Services (Cal OES) has issued advisory statements to local jurisdictions and the public following seismic activity that scientists on the California Earthquake Prediction Evaluation Council view as indicating elevated probability of a larger earthquake in the same area during the next several days....
Magmatic degassing, lava dome extrusion, and explosions from Mount Cleveland volcano, Alaska, 2011–2015: Insight into the continuous nature of volcanic activity over multi-year timescales
Cynthia Werner, Christoph Kern, Diego Coppola, John J. Lyons, Peter J. Kelly, Kristi L. Wallace, David J. Schneider, Rick Wessels
2017, Journal of Volcanology and Geothermal Research (337) 98-110
Mount Cleveland volcano (1730 m) is one of the most active volcanoes in the Aleutian arc, Alaska, but heightened activity is rarely accompanied by geophysical signals, which makes interpretation of the activity difficult. In this study, we combine volcanic gas emissions measured for the first time in August 2015 with longer-term...
Cosmogenic nuclide age estimate for Laurentide Ice Sheet recession from the terminal moraine, New Jersey, USA, and constraints on latest Pleistocene ice sheet history
Lee B. Corbett, Paul R. Bierman, Byron D. Stone, Marc W. Caffee, Patrick L. Larsen
2017, Quaternary Research (87) 482-498
The time at which the Laurentide Ice Sheet reached its maximum extent and subsequently retreated from its terminal moraine in New Jersey has been constrained by bracketing radiocarbon ages on preglacial and postglacial sediments. Here, we present measurements of in situ produced 10Be and 26Al in 16 quartz-bearing...
Drawing a line in the sand: Effectiveness of off-highway vehicle management in California's Sonoran desert
Nathan Custer, Lesley A. Defalco, Kenneth E. Nussear, Todd C. Esque
2017, Journal of Environmental Management (193) 448-457
Public land policies manage multiple uses while striving to protect vulnerable plant and wildlife habitats from degradation; yet the effectiveness of such policies are infrequently evaluated, particularly for remote landscapes that are difficult to monitor. We assessed the use and impacts of recreational vehicles on Mojave Desert washes (intermittent streams)...
Neutron scattering measurements of carbon dioxide adsorption in pores within the Marcellus Shale: Implications for sequestration
Konstantinos L. Stefanopoulos, Tristan G. A. Youngs, Richard Sakurovs, Leslie F. Ruppert, Jitendra Bahadur, Yuri B. Melnichenko
2017, Environmental Science & Technology (51) 6515-6521
Shale is an increasingly viable source of natural gas and a potential candidate for geologic CO2sequestration. Understanding the gas adsorption behavior on shale is necessary for the design of optimal gas recovery and sequestration projects. In the present study neutron diffraction and small-angle neutron scattering measurements of adsorbed CO2 in Marcellus...
