A hybrid double-observer sightability model for aerial surveys
Paul C. Griffin, Bruce C. Lubow, Kurt J. Jenkins, David J. Vales, Barbara J. Moeller, Mason Reid, Patricia J. Happe, Scott M. Mccorquodale, Michelle J. Tirhi, Jim P. Schaberi, Katherine Beirne
2013, Journal of Wildlife Management (77) 1532-1544
Raw counts from aerial surveys make no correction for undetected animals and provide no estimate of precision with which to judge the utility of the counts. Sightability modeling and double-observer (DO) modeling are 2 commonly used approaches to account for detection bias and to estimate precision in aerial surveys. We...
Geospatial compilation of historical water-level altitudes in the Chicot and Evangeline aquifers 1977-2013 and Jasper aquifer 2000-13 in the Gulf Coast aquifer system, Houston-Galveston Region, Texas
Michaela R. Johnson, Robert H.H. Ellis
2013, Data Series 793
The U.S. Geological Survey (USGS) in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, Lone Star Groundwater Conservation District, and Brazoria County Groundwater Conservation District has produced a series of annual reports depicting groundwater-level altitudes in the Chicot, Evangeline, and Jasper aquifers of the Gulf...
Evaluating changes to reservoir rule curves using historical water-level data
Ethan Mower, Leandro E. Miranda
2013, International Journal of River Basin Management (11) 323-328
Flood control reservoirs are typically managed through rule curves (i.e. target water levels) which control the storage and release timing of flood waters. Changes to rule curves are often contemplated and requested by various user groups and management agencies with no information available about the actual flood risk of such...
Chemistry and age of groundwater in bedrock aquifers of the Piceance and Yellow Creek watersheds, Rio Blanco County, Colorado, 2010-12
P.B. McMahon, J.C. Thomas, A.G. Hunt
2013, Scientific Investigations Report 2013-5132
Fourteen monitoring wells completed in the Uinta and Green River Formations in the Piceance Creek and Yellow Creek watersheds in Rio Blanco County, Colorado, were sampled for chemical, isotopic, and groundwater-age tracers to provide information on the overall groundwater quality, the occurrence and distribution of chemicals that could be related...
Chemistry and age of groundwater in the Piceance structural basin, Rio Blanco county, Colorado, 2010-12
Peter B. McMahon, Judith C. Thomas, Andrew G. Hunt
2013, Fact Sheet 2013-3047
Fourteen monitoring wells were sampled by the U.S. Geological Survey, in cooperation with the Bureau of Land Management, to better understand the chemistry and age of groundwater in the Piceance structural basin in Rio Blanco County, Colorado, and how they may relate to the development of underlying natural-gas reservoirs. Natural...
Is exposure to cyanobacteria an environmental risk factor for amyotrophic lateral sclerosis and other neurodegenerative diseases?
Walter G. Bradley, Amy R. Borenstein, Lorene M. Nelson, Geoffrey A. Codd, Barry H. Rosen, Elijah W. Stommel, Paul Alan Cox
2013, Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration (14) 325-333
There is a broad scientific consensus that amyotrophic lateral sclerosis (ALS) is caused by gene-environment interactions. Mutations in genes underlying familial ALS (fALS) have been discovered in only 5–10% of the total population of ALS patients. Relatively little attention has been paid to environmental and lifestyle factors that may trigger...
Diel horizontal migration in streams: juvenile fish exploit spatial heterogeneity in thermal and trophic resources
Jonathan B. Armstrong, Daniel E. Schindler, Casey P. Ruff, Gabriel T. Brooks, Kale E. Bentley, Christian E. Torgersen
2013, Ecology (94) 2066-2075
Vertical heterogeneity in the physical characteristics of lakes and oceans is ecologically salient and exploited by a wide range of taxa through diel vertical migration to enhance their growth and survival. Whether analogous behaviors exploit horizontal habitat heterogeneity in streams is largely unknown. We investigated fish movement behavior at daily...
Identification of unrecognized tundra fire events on the north slope of Alaska
Benjamin M. Jones, Amy L. Breen, Benjamin V. Gaglioti, Daniel H. Mann, Adrian V. Rocha, Guido Grosse, Christopher D. Arp, Michael L. Kunz, Donald A. Walker
2013, Journal of Geophysical Research: Biogeosciences (118) 1334-1344
Characteristics of the natural fire regime are poorly resolved in the Arctic, even though fire may play an important role cycling carbon stored in tundra vegetation and soils to the atmosphere. In the course of studying vegetation and permafrost-terrain characteristics along a chronosequence of tundra burn sites from AD 1977,...
Response of cackling geese (Branta hutchinsii taverneri to spatial and temporal variation in production of crowberries on the Alaska Peninsula
Jerry W. Hupp, David E. Safine, Ryan M. Nielson
2013, Polar Biology (36) 1243-1255
Arctic geese often feed on berries during premigratory fattening. We hypothesized that during autumn staging on the Alaska Peninsula, the distribution of Taverne's cackling geese (Branta hutchinsii taverneri) would be correlated with spatial variation in crowberry (Empetrum nigrum) abundance. We also predicted that daily rates of fat increase among cackling...
Habitat quality and recruitment success of cui-ui in the Truckee River downstream of Marble Bluff Dam, Pyramid Lake, Nevada
G. Gary Scoppettone, Peter H. Rissler, J. Antonio Salgado, Beverly Harry
2013, Open-File Report 2013-1247
We compared cui-ui (Chasmistes cujus) recruitment from two reaches of the Truckee River with histories of severe erosional downcutting caused by a decline in Pyramid Lake surface elevation. In 1975, Marble Bluff Dam (MBD) was constructed 5 kilometers upstream of the extant mouth of the Truckee River to stabilize the...
Response of diatoms and silicoflagellates to climate change in the Santa Barbara Basin during the past 250 years and the rise of the toxic diatom Pseudo-nitzschia australis
John A. Barron, David Bukry, David B. Field, Bruce Finney
2013, Quaternary International (310) 140-154
Diatoms and silicoflagellate assemblages were examined in two year-increments of varved samples spanning the interval from 1748 through 2007 in Santa Barbara Basin (SBB) box core SBBC0806 to determine the timing and impact of possible 20th century warming on several different components of the plankton. Diatoms (Thalassionema nitzschioides =TN) and...
Ranking contributing areas of salt and selenium in the Lower Gunnison River Basin, Colorado, using multiple linear regression models
Joshua I. Linard
2013, Scientific Investigations Report 2013-5075
Mitigating the effects of salt and selenium on water quality in the Grand Valley and lower Gunnison River Basin in western Colorado is a major concern for land managers. Previous modeling indicated means to improve the models by including more detailed geospatial data and a more rigorous method for developing...
Updating the planetary time scale: focus on Mars
Kenneth L. Tanaka, Cathy Quantin-Nataf
2013, Ciencias Da Terra
Formal stratigraphic systems have been developed for the surface materials of the Moon, Mars, Mercury, and the Galilean satellite Ganymede. These systems are based on geologic mapping, which establishes relative ages of surfaces delineated by superposition, morphology, impact crater densities, and other relations and features. Referent units selected from the...
SSR_pipeline: a bioinformatic infrastructure for identifying microsatellites from paired-end Illumina high-throughput DNA sequencing data
Mark P. Miller, Brian J. Knaus, Thomas D. Mullins, Susan M. Haig
2013, Journal of Heredity (104) 881-885
SSR_pipeline is a flexible set of programs designed to efficiently identify simple sequence repeats (e.g., microsatellites) from paired-end high-throughput Illumina DNA sequencing data. The program suite contains 3 analysis modules along with a fourth control module that can automate analyses of large volumes of data. The modules are used to...
A fluid-driven earthquake swarm on the margin of the Yellowstone caldera
David R. Shelly, David P. Hill, Frederick Massin, Jamie Farrell, Robert B. Smith, Taka'aki Taira
2013, Journal of Geophysical Research B: Solid Earth (118) 4872-4886
Over the past several decades, the Yellowstone caldera has experienced frequent earthquake swarms and repeated cycles of uplift and subsidence, reflecting dynamic volcanic and tectonic processes. Here, we examine the detailed spatial-temporal evolution of the 2010 Madison Plateau swarm, which occurred near the northwest boundary of the Yellowstone caldera. To...
Baseline monitoring of the western Arctic Ocean estimates 20% of the Canadian Basin surface waters are undersaturated with respect to aragonite
Lisa L. Robbins, Jonathan G. Wynn, John T. Lisle, Kimberly K. Yates, Paul O. Knorr, Robert H. Byrne, Xuewu Liu, Mark C. Patsavas, Kumiko Azetsu-Scott, Taro Takahashi
2013, PLoS ONE (8)
Marine surface waters are being acidified due to uptake of anthropogenic carbon dioxide, resulting in surface ocean areas of undersaturation with respect to carbonate minerals, including aragonite. In the Arctic Ocean, acidification is expected to occur at an accelerated rate with respect to the global oceans, but a paucity of...
Regional signatures of plant response to drought and elevated temperature across a desert ecosystem
Seth M. Munson, Esteban H. Muldavin, Jayne Belnap, Debra P.C. Peters, John P. Anderson, M. Hildegard Reiser, Kirsten Gallo, Alicia Melgoza-Castillo, Jeffrey E. Herrick, Tim A. Christiansen
2013, Ecology (94) 2030-2041
The performance of many desert plant species in North America may decline with the warmer and drier conditions predicted by climate change models, thereby accelerating land degradation and reducing ecosystem productivity. We paired repeat measurements of plant canopy cover with climate at multiple sites across the Chihuahuan Desert over the...
A scenario and forecast model for Gulf of Mexico hypoxic area and volume
Donald Scavia, Mary Anne Evans, Daniel R. Obenour
2013, Environmental Science & Technology (47)
For almost three decades, the relative size of the hypoxic region on the Louisiana-Texas continental shelf has drawn scientific and policy attention. During that time, both simple and complex models have been used to explore hypoxia dynamics and to provide management guidance relating the size of the hypoxic zone...
Characterizing regional soil mineral composition using spectroscopyand geostatistics
V.L. Mulder, S. de Bruin, J. Weyermann, Raymond F. Kokaly, M.E. Schaepman
2013, Remote Sensing of Environment (139) 415-429
This work aims at improving the mapping of major mineral variability at regional scale using scale-dependent spatial variability observed in remote sensing data. Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data and statistical methods were combined with laboratory-based mineral characterization of field samples to create maps of the distributions...
On the absolute calibration of SO2 cameras
Peter Lubcke, Nicole Bobrowski, Sebastian Illing, Christoph Kern, Jose Manuel Alvarez Nieves, Leif Vogel, Johannes Zielcke, Hugo Delgados Granados, Ulrich Platt
2013, Atmospheric Measurement Techniques (6) 677-696
Sulphur dioxide emission rate measurements are an important tool for volcanic monitoring and eruption risk assessment. The SO2 camera technique remotely measures volcanic emissions by analysing the ultraviolet absorption of SO2 in a narrow spectral window between 300 and 320 nm using solar radiation scattered in the atmosphere. The SO2...
Recent (circa 1998 to 2011) channel-migration rates of selected streams in Indiana
Bret A. Robinson
2013, Scientific Investigations Report 2013-5168
An investigation was completed to document recent (circa 1998 to 2011) channel-migration rates at 970 meander bends along 38 of the largest streams in Indiana. Data collection was completed by using the Google Earth™ platform and, for each selected site, identifying two images with capture dates separated by multiple years....
Nickel-cobalt laterites: a deposit model
Erin E. Marsh, Eric D. Anderson, Floyd Gray
2013, Scientific Investigations Report 2010-5070-H
Nickel-cobalt (Ni-Co) laterite deposits are supergene enrichments of Ni±Co that form from intense chemical and mechanical weathering of ultramafic parent rocks. These regolith deposits typically form within 26 degrees of the equator, although there are a few exceptions. They form in active continental margins and stable cratonic settings. It takes...
Quality of groundwater and surface water, Wood River Valley, south-central Idaho, July and August 2012
Candice B. Hopkins, James R. Bartolino
2013, Scientific Investigations Report 2013-5163
Residents and resource managers of the Wood River Valley of south-central Idaho are concerned about the effects that population growth might have on the quality of groundwater and surface water. As part of a multi-phase assessment of the groundwater resources in the study area, the U.S. Geological Survey evaluated the...
Geohydrology, geochemistry, and groundwater simulation (1992-2011) and analysis of potential water-supply management options, 2010-60, of the Langford Basin, California
Lois M. Voronin, Jill N. Densmore, Peter Martin, Charles F. Brush, Carl S. Carlson, David M. Miller
2013, Scientific Investigations Report 2013-5101
Groundwater withdrawals began in 1992 from the Langford Basin within the Fort Irwin National Training Center (NTC), California. From April 1992 to December 2010, approximately 12,300 acre-feet of water (averaging about 650 acre-feet per year) has been withdrawn from the basin and transported to the adjacent Irwin Basin. Since withdrawals...
The distribution and modeling of nitrate transport in the Carson Valley alluvial aquifer, Douglas County, Nevada
Ramon C. Naranjo, Toby L. Welborn, Michael R. Rosen
2013, Scientific Investigations Report 2013-5136
Residents of Carson Valley in Douglas County, Nevada, rely on groundwater from an alluvial aquifer for domestic use and agricultural irrigation. Since the 1970s, there has been a rapid increase in population in several parts of the valley that rely on domestic wells for drinking water and septic systems for...
