USGS48 Puerto Rico precipitation - A new isotopic reference material for δ2H and δ18O measurements of water
Haiping Qi, Tyler B. Coplen, Lauren V. Tarbox, Jennifer M. Lorenz, Martha A. Scholl
2014, Isotopes in Environmental and Health Studies (50) 442-447
A new secondary isotopic reference material has been prepared from Puerto Rico precipitation, which was filtered, homogenised, loaded into glass ampoules, sealed with a torch, autoclaved to eliminate biological activity, and calibrated by dual-inlet isotope-ratio mass spectrometry. This isotopic reference material, designated as USGS48, is intended to be one of...
Self-recognition in corals facilitates deep-sea habitat engineering
Sebastian J Hennige, Cheryl L. Morrison, Armin U. Form, Janina Buscher, Nicholas A. Kamenos, J. Murray Roberts
2014, Scientific Reports (4) 1-7
The ability of coral reefs to engineer complex three-dimensional habitats is central to their success and the rich biodiversity they support. In tropical reefs, encrusting coralline algae bind together substrates and dead coral framework to make continuous reef structures, but beyond the photic zone, the cold-water coral Lophelia pertusa also...
Openness to the unexpected: Our Pathways to Careers in a Federal Research Laboratory.
Kurt R. Newman, David B. Bunnell, Darryl W. Hondorp
William W. Taylor, Abigail J. Lynch, Nancy J. Leonard, editor(s)
2014, Book chapter, Future of fisheries: Perspectives for emerging professionals
Many fisheries professionals may not be in the job they originally envisioned for themselves when they began their undergraduate studies. Rather, their current positions could be the result of unexpected, opportunistic, or perhaps even “lucky” open doors that led them down an unexpected path. In many cases, a mentor helped...
The Wallula fault and tectonic framework of south-central Washington, as interpreted from magnetic and gravity anomalies
Richard J. Blakely, Brian L. Sherrod, Craig S. Weaver, Ray E. Wells, Alan C. Rohay
2014, Tectonophysics (624-625) 32-45
The Yakima fold and thrust belt (YFTB) in central Washington has accommodated regional, mostly north-directed, deformation of the Cascadia backarc since prior to emplacement of Miocene flood basalt of the Columbia River Basalt Group (CRBG). The YFTB consists of two structural domains. Northern folds of the YFTB strike eastward and...
Earth observation based assessment of the water production and water consumption of Nile Basin agro-ecosystems
Wim Bastiaanssen, Poolad Karimi, Lisa-Maria Rebelo, Zheng Duan, Gabriel B. Senay, Lal Muthuwatte, Vladimir Smakhtin
2014, Remote Sensing (6) 10306-10334
The increasing competition for water resources requires a better understanding of flows, fluxes, stocks, and the services and benefits related to water consumption. This paper explains how public domain Earth Observation data based on Moderate Resolution Imaging Spectroradiometer (MODIS), Second Generation Meteosat (MSG), Tropical Rainfall Measurement Mission (TRMM) and various...
Forest ecosystem reorganization underway in the Southwestern US: A preview of widespread forest changes in the Anthropocene
Craig D. Allen
V. Alaric Sample, R. Patrick Bixler, editor(s)
2014, Proceedings RMRS-P-71
No abstract available....
Finding that academic position
David W. Willis, Daniel A. Isermann
William W. Taylor, Abigail J. Lynch, Nancy J. Leonard, editor(s)
2014, Book chapter, Future of fisheries: Perspectives for emerging professionals
No abstract available....
Predicting the spatial extent of liquefaction from geospatial and earthquake specific parameters
Jing Zhu, Laurie G. Baise, Eric M. Thompson, David J. Wald, Keith L. Knudsen
George Deodatis, Bruce R. Ellingwood, Dan M. Frangopol, editor(s)
2014, Conference Paper, Safety, reliability, risk and life-cycle performance of structures and infrastructures: Proceedings of the 11th international conference on structural safety and reliability
The spatially extensive damage from the 2010-2011 Christchurch, New Zealand earthquake events are a reminder of the need for liquefaction hazard maps for anticipating damage from future earthquakes. Liquefaction hazard mapping as traditionally relied on detailed geologic mapping and expensive site studies. These traditional techniques are difficult to apply globally...
Chromic and iron oxides as fecal markers to identify individual whooping cranes
Megan E. Brown, Robert Doyle, Jane N. Chandler, Glenn H. Olsen, John B. French, David E Wildt, Sarah J. Converse, Carol L Keefer, Nucharin Songsasen
David Aborn, Richard P. Urbanek, editor(s)
2014, Conference Paper, Proceedings of the twelfth North American crane workshop
The whooping crane (Grus americana) is listed as endangered under the IUCN Red List, the United States Endangered Species Act, and the Canadian Species at Risk Act (BirdLife International 2012, CWS and USFWS 2007). A major focus of recovery efforts for this endangered species is reintroduction to establish new populations...
Thermodynamic properties for arsenic minerals and aqueous species
D. Kirk Nordstrom, Juraj Majzlan, Erich Konigsberger
Robert J. Bowell, Charles N. Alpers, Heather E. Jamieson, D. Kirk Nordstrom, Juraj Majzlan, editor(s)
2014, Book chapter, Arsenic: Environmental geochemistry, mineralogy, and microbiology (Reviews in Mineralogy and Geochemistry no. 79)
Quantitative geochemical calculations are not possible without thermodynamic databases and considerable advances in the quantity and quality of these databases have been made since the early days of Lewis and Randall (1923), Latimer (1952), and Rossini et al. (1952). Oelkers et al. (2009) wrote, “The creation...
Arsenic associated with historical gold mining in the Sierra Nevada foothills: Case study and field trip guide for Empire Mine State Historic Park, California
Charles N. Alpers, Perry A Myers, Daniel Millsap, Tamsen B Regnier
Robert J. Bowell, Charles N. Alpers, Heather E. Jamieson, D. Kirk Nordstrom, Juraj Majzlan, editor(s)
2014, Reviews in Mineralogy and Geochemistry (79) 553-587
The Empire Mine, together with other mines in the Grass Valley mining district, produced at least 21.3 million troy ounces (663 tonnes) of gold (Au) during the 1850s through the 1950s, making it the most productive hardrock Au mining district in California history (Clark 1970). The Empire Mine...
Population demographics and life history of the round hickorynut (Obovaria subrotunda) in the Duck River, Tennessee
Chase Ehlo, James B. Layzer
2014, American Midland Naturalist (171) 1-15
Population characteristics and life history aspects of healthy mussel populations are poorly understood. The reproductive cycle, age and growth, and population structure of Obovaria subrotunda were examined at four sites in the middle Duck River, Tennessee. Obovaria subrotunda was confirmed to be a bradytictic species, spawning in the late summer and holding glochidia in...
Petrology and chemistry of the Green Acres gabbro complex near Winchester, Riverside County, California
Byron R. Berger
Douglas M. Morton, Fred K. Miller, editor(s)
2014, Book chapter, Peninsular Ranges Batholith, Baja California and Southern California
The Cretaceous Green Acres layered igneous complex, northeast of Winchester, California, is composed of a suite of olivine- and hornblende-bearing gabbros in the Peninsular Ranges batholith within the Perris tectonic block. A consistent mineral assemblage is observed throughout the complex, but there is considerable textural and modal heterogeneity. Both preclude...
Applying threshold concepts to conservation management of dryland ecosystems: Case studies on the Colorado Plateau
Matthew A. Bowker, Mark E. Miller, Steven L. Garman, Travis Belote
Glenn R. Guntenspergen, editor(s)
2014, Book chapter, Application of threshold concepts in natural resource decision making
Ecosystems may occupy functionally distinct alternative states, some of which are more or less desirable from a management standpoint. Transitions from state to state are usually associated with a particular trigger or sequence of triggers, such as the addition or subtraction of a disturbance. Transitions are often not linear, rather...
Hydrologic alteration affects aquatic plant assemblages in an arid-land river
Mark R. Vinson, Bennett Hestmark, Mary E. Barkworth
2014, Southwestern Naturalist (59) 480-488
We evaluated the effects of long-term flow alteration on primary-producer assemblages. In 1962, Flaming Gorge Dam was constructed on the Green River. The Yampa River has remained an unregulated hydrologically variable river that joins the Green River 100 km downstream from Flaming Gorge Dam. In the 1960s before dam construction...
Stable occupancy by breeding hawks (Buteo spp.) over 25 years on a privately managed bunchgrass prairie in northeastern Oregon, USA
Patricia L. Kennedy, Anne M. Bartuszevige, Marcy Houle, Ann B. Humphrey, Katie M. Dugger, John Williams
2014, The Condor (116) 435-445
Potential for large prairie remnants to provide habitat for grassland-obligate wildlife may be compromised by nonsustainable range-management practices. In 1979–1980, high nesting densities of 3 species of hawks in the genus Buteo—Ferruginous Hawk (Buteo regalis), Red-tailed Hawk (B. jamaicensis), and Swainson's Hawk (B. swainsoni)—were documented on the Zumwalt Prairie and surrounding...
Predicting Impacts of tropical cyclones and sea-Level rise on beach mouse habitat
Q. Chen, Hongqing Wang, Lixia Wang, Robert Tawes, Drew Rollman
2014, Journal of Coastal Research (68) 12-19
Alabama beach mouse (ABM) (Peromyscus polionotus ammobates) is an important component of the coastal dune ecosystem along the Gulf of Mexico. Due to habitat loss and degradation, ABM is federally listed as an endangered species. In this study, we examined the impacts of storm surge and wind waves, which are...
Modeling the hydrogeophysical response of lake talik evolution
Burke J. Minsley, Tristan Wellman, Michelle Ann Walvoord, Andre Revil
2014, Conference Paper, SEG Technical Program Expanded Abstracts 2014
Geophysical methods provide valuable information about subsurface permafrost and its relation to dynamic hydrologic systems. Airborne electromagnetic data from interior Alaska are used to map the distribution of permafrost, geological features, surface water, and groundwater. To validate and gain further insight into these field datasets, we also explore the geophysical...
Continuous water-quality and suspended-sediment transport monitoring in the San Francisco Bay, California, water years 2011–13
Paul A. Buchanan, Maureen A. Downing-Kunz, David H. Schoellhamer, Gregory Shellenbarger, Kurt Weidich
2014, Fact Sheet 2014-3090
The U.S. Geological Survey (USGS) monitors water quality and suspended-sediment transport in the San Francisco Bay. The San Francisco Bay area is home to millions of people, and the bay teems with both resident and migratory wildlife, plants, and fish. Fresh water mixes with salt water in the bay, which...
Use of multi-sensor active fire detections to map fires in the United States: the future of monitoring trends in burn severity
Joshua J. Picotte, Michael Coan, Stephen M. Howard
2014, Conference Paper, Proceedings: Wildland fire in the Appalachians: Discussions among managers and scientists. General Technical Report SRS-199
The effort to utilize satellite-based MODIS, AVHRR, and GOES fire detections from the Hazard Monitoring System (HMS) to identify undocumented fires in Florida and improve the Monitoring Trends in Burn Severity (MTBS) mapping process has yielded promising results. This method was augmented using regression tree models to identify burned/not-burned pixels...
Well log and 2D seismic data character of the Wilcox Group in south-central Louisiana
Catherine B. Enomoto
2014, Gulf Coast Association of Geological Societies Transactions (64) 105-118
Well logs and 2D seismic data were used to interpret the depth and morphology of potential Paleocene and lower Eocene Wilcox Group slope and basin-floor reservoirs in south-central Louisiana. These may occur in a poorly explored area previously estimated by the U.S. Geological Survey to contain a mean undiscovered conventional...
The Devonian Marcellus Shale and Millboro Shale
Daniel J. Soeder, Catherine B. Enomoto, John A. Chermak
2014, GSA Field Guides (35) 129-160
The recent development of unconventional oil and natural gas resources in the United States builds upon many decades of research, which included resource assessment and the development of well completion and extraction technology. The Eastern Gas Shales Project, funded by the U.S. Department of Energy in the 1980s, investigated the...
Shale hydrocarbon reservoirs: Some influences of tectonics and paleogeography during deposition
Jennifer D Eoff
2014, Book chapter, Geology of the Haynesville gas shale in east Texas and west Louisiana
Continuous hydrocarbon accumulations in shale reservoirs appear to be characterized by common paleotectonic and paleogeographic histories and are limited to specific intervals of geologic time. In addition, most North American self-sourced shale correlates with geologic time periods of calcitic seas and greenhouse conditions and with evolutionary turnover of marine...
Ground-motion site effects from multimethod shear-wave velocity characterization at 16 seismograph stations deployed for aftershocks of the August 2011 Mineral, Virginia earthquake
William J. Stephenson, Jackson K. Odum, Daniel E. McNamara, Robert A. Williams, Stephen J Angster
2014, GSA Special Papers (509) 47-65
We characterize shear-wave velocity versus depth (Vs profile) at 16 portable seismograph sites through the epicentral region of the 2011 Mw 5.8 Mineral (Virginia, USA) earthquake to investigate ground-motion site effects in the area. We used a multimethod acquisition and analysis approach, where active-source horizontal shear (SH) wave reflection and refraction...
Molecular signature of organic nitrogen in septic-impacted groundwater
William A. Arnold, Krista Longnecker, Kevin D. Kroeger, Elizabeth B. Kujawinski
2014, Environmental Science: Processes and Impacts (16) 2400-2407
Dissolved inorganic and organic nitrogen levels are elevated in aquatic systems due to anthropogenic activities. Dissolved organic nitrogen (DON) arises from various sources, and its impact could be more clearly constrained if specific sources were identified and if the molecular-level composition of DON were better understood. In this work, the...
