Late Quaternary slip history of the Mill Creek strand of the San Andreas fault in San Gorgonio Pass, southern California: The role of a subsidiary left-lateral fault in strand switching
Katherine J. Kendrick, Jonathan C. Matti, Shannon A. Mahan
2015, Geological Society of America Bulletin (127) 825-849
The fault history of the Mill Creek strand of the San Andreas fault (SAF) in the San Gorgonio Pass region, along with the reconstructed geomorphology surrounding this fault strand, reveals the important role of the left-lateral Pinto Mountain fault in the regional fault strand switching. The Mill Creek strand has...
Effects of hierarchical roost removal on northern long-eared bat (Myotis septentrionalis) maternity colonies
Alexander Silvis, W. Mark Ford, Eric R. Britzke
2015, PLoS ONE (10)
Forest roosting bats use a variety of ephemeral roosts such as snags and declining live trees. Although conservation of summer maternity habitat is considered critical for forest-roosting bats, bat response to roost loss still is poorly understood. To address this, we monitored 3 northern long-eared bat (Myotis septentrionalis) maternity colonies...
North America's net terrestrial CO2 exchange with the atmosphere 1990–2009
A.W. King, R.J. Andres, K.J. Davis, M. Hafer, D.J. Hayes, Deborah N. Huntzinger, Bernardus de Jong, W.A. Kurz, A. David McGuire, Rodrigo I. Vargas, Y. Wei, Tristram O. West, Christopher W. Woodall
2015, Biogeosciences (12) 399-414
Scientific understanding of the global carbon cycle is required for developing national and international policy to mitigate fossil fuel CO2 emissions by managing terrestrial carbon uptake. Toward that understanding and as a contribution to the REgional Carbon Cycle Assessment and Processes (RECCAP) project, this paper provides a synthesis of net land–atmosphere...
Farallon de Medinilla seabird and Tinian moorhen analyses
Richard J. Camp, Christina R. Leopold, Kevin W. Brinck, Franz Juola
2015, Technical Report HCSU-060
This report assesses the trends in brown booby (Sula leucogaster), masked booby (S. dactylatra), and red-footed booby (S. sula) counts collected on Farallon de Medinilla and Mariana common moorhen (Gallinula chloropus guami) counts on Tinian, Commonwealth of the Northern Mariana Islands to help elucidate patterns in bird numbers. During either...
The quality of our Nation's waters: water quality in the glacial aquifer system, northern United States, 1993-2009
Kelly L. Warner, Joseph D. Ayotte
2015, Circular 1352
The glacial aquifer system underlies much of the northern United States. About one-sixth (41 million people) of the United States population relies on the glacial aquifer system for drinking water. The primary importance of the glacial aquifer system is as a source of water for public supply to the population...
The quality of our Nation's waters: water quality in the Upper Floridan aquifer and overlying surficial aquifers, southeastern United States, 1993-2010
Marian P. Berndt, Brian G. Katz, James A. Kingsbury, Christy A. Crandall
2015, Circular 1355
About 10 million people rely on groundwater from the Upper Floridan and surficial aquifers for drinking water. The Upper Floridan aquifer also is of primary importance to the region as a source of water for irrigation and as a source of crystal clear water that discharges to springs and streams...
The quality of our Nation's waters: Water quality in principal aquifers of the United States, 1991-2010
Leslie A. DeSimone, Peter B. McMahon, Michael R. Rosen
2015, Circular 1360
About 130 million people in the United States rely on groundwater for drinking water, and the need for high-quality drinking-water supplies becomes more urgent as our population grows. Although groundwater is a safe, reliable source of drinking water for millions of people nationwide, high concentrations of some chemical constituents can...
The quality of our Nation's waters: water quality in the Northern Atlantic Coastal Plain surficial aquifer system, Delaware, Maryland, New Jersey, New York, North Carolina, and Virginia, 1988-2009
Judith M. Denver, Scott W. Ator, Jeffrey M. Fischer, Douglas C. Harned, Christopher Schubert, Zoltan Szabo
2015, Circular 1353
The surficial aquifer system of the Northern Atlantic Coastal Plain is made up of unconfined aquifers that underlie most of the area. This aquifer system is a critical renewable source of drinking water and is the source of most flow to streams and of recharge to underlying confined aquifers. Millions...
The quality of our Nation's waters: water quality in the Mississippi embayment-Texas coastal uplands aquifer system and Mississippi River Valley alluvial aquifer, south-central United States, 1994-2008
James A. Kingsbury, Jeannie R. B. Barlow, Brian G. Katz, Heather L. Welch, Roland W. Tollett, Lynne S. Fahlquist
2015, Circular 1356
About 8 million people rely on groundwater from the Mississippi embayment—Texas coastal uplands aquifer system for drinking water. The Mississippi River Valley alluvial aquifer also provides drinking water for domestic use in rural areas but is of primary importance to the region as a source of water for irrigation. Irrigation...
The quality of our Nation's waters: Water quality in basin-fill aquifers of the southwestern United States: Arizona, California, Colorado, Nevada, New Mexico, and Utah, 1993-2009
Susan A. Thiros, Angela P. Paul, Laura M. Bexfield, David W. Anning
2015, Circular 1358
The Southwest Principal Aquifers consist of many basin-fill aquifers in California, Nevada, Utah, Arizona, New Mexico, and Colorado. Demands for irrigation and drinking water have substantially increased groundwater withdrawals and irrigation return flow to some of these aquifers. These changes have increased the movement of contaminants from geologic and human...
The quality of our Nation's waters: groundwater quality in the Columbia Plateau and Snake River Plain basin-fill and basaltic-rock aquifers and the Hawaiian volcanic-rock aquifers, Washington, Idaho, and Hawaii, 1993-2005
Michael G. Rupert, Charles D. Hunt Jr., Kenneth D. Skinner, Lonna M. Frans, Barbara Mahler
2015, Circular 1359
The Columbia Plateau, Snake River Plain, and Hawaii are large volcanic areas in the western United States and mid-Pacific ocean that contain extensive regional aquifers of a hard, gray, volcanic rock called basalt. Residents of the Columbia Plateau, the Snake River Plain, and the island of Oahu depend on groundwater...
The quality of our nation's waters: water quality in the Principal Aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions, eastern United States, 1993-2009
Bruce D. Lindsey, Tammy M. Zimmerman, Melinda J. Chapman, Charles A. Cravotta III,, Zoltan Szabo
2015, Circular 1354
The aquifers of the Piedmont, Blue Ridge, and Valley and Ridge regions underlie an area with a population of more than 40 million people in 10 states. The suburban and rural population is large, growing rapidly, and increasingly dependent on groundwater as a source of supply, with more than 550...
Hydrogeology of the Ramapo River-Woodbury Creek valley-fill aquifer system and adjacent areas in eastern Orange County, New York
Paul M. Heisig
2015, Scientific Investigations Report 2014-5156
The hydrogeology of the valley-fill aquifer system and surrounding watershed areas was investigated within a 23-mile long, fault-controlled valley in eastern Orange County, New York. Glacial deposits form a divide within the valley that is drained to the north by Woodbury Creek and is drained to the south by the...
Soil greenhouse gas emissions and carbon budgeting in a short-hydroperiod floodplain wetland
Jackie Batson, Gregory B. Noe, Cliff R. Hupp, Ken W. Krauss, Nancy B. Rybicki, Edward R. Schenk
2015, Journal of Geophysical Research: Biogeosciences (120) 77-95
Understanding the controls on floodplain carbon (C) cycling is important for assessing greenhouse gas emissions and the potential for C sequestration in river-floodplain ecosystems. We hypothesized that greater hydrologic connectivity would increase C inputs to floodplains that would not only stimulate soil C gas emissions but also sequester more C...
Enhanced understanding of ectoparasite: host trophic linkages on coral reefs through stable isotope analysis
Amanda W.J. Demopoulos, Paul C. Sikkel
2015, International Journal for Parasitology: Parasites and Wildlife (4) 125-134
Parasitism, although the most common type of ecological interaction, is usually ignored in food web models and studies of trophic connectivity. Stable isotope analysis is widely used in assessing the flow of energy in ecological communities and thus is a potentially valuable tool in understanding the cryptic trophic relationships mediated...
Timelines and mechanisms of wildlife population recovery following the Exxon Valdez Oil Spill
Daniel Esler, James L. Bodkin, Brenda E. Ballachey, Daniel Monson, Kimberly A. Kloecker, George G. Esslinger
2015, Deep Sea Research Part II: Topical Studies in Oceanography 5-6-5-17
In March 1989, the T/V Exxon Valdez ran aground in Prince William Sound (PWS), Alaska and spilled an estimated 42 million liters of crude oil (Wolfe et al. 1994). This oil subsequently spread over more than 26,000 km2 of water surface in PWS and the Gulf of Alaska and landed...
Assessment of undiscovered copper resources associated with the Permian Kupferschiefer, Southern Permian Basin, Europe
Michael L. Zientek, Slawomir Oszczepalski, Heather L. Parks, James D. Bliss, Gregor Borg, Stephen E. Box, Paul Denning, Timothy S. Hayes, Volker Spieth, Cliff D. Taylor
2015, Scientific Investigations Report 2010-5090-U
This study synthesizes available information and estimates the location and quantity of undiscovered copper associated with a late Permian bituminous shale, the Kupferschiefer, of the Southern Permian Basin in Europe. The purpose of this study is to (1) delineate permissive areas (tracts) where undiscovered reduced-facies sediment-hosted stratabound copper deposits could...
Concentrations of hormones, pharmaceuticals and other micropollutants in groundwater affected by septic systems in New England and New York
Patrick J. Phillips, Christopher Schubert, Denise M. Argue, Irene J. Fisher, Edward T. Furlong, William T. Foreman, James L. Gray, Ann T. Chalmers
2015, Science of the Total Environment (512-513) 43-54
Septic-system discharges can be an important source of micropollutants (including pharmaceuticals and endocrine active compounds) to adjacent groundwater and surface water systems. Groundwater samples were collected from well networks tapping glacial till in New England (NE) and sandy surficial aquifer New York (NY) during one sampling round in 2011. The...
Sea otters in captivity: applications and implications of husbandry development, public display, scientific research and management, and rescue and rehabilitation for sea otter conservation
Glenn R. VanBlaricom, Traci F. Belting, Lisa H. Triggs
2015, Book chapter
Studies of sea otters in captivity began in 1932, producing important insights for conservation. Soviet (initiated in 1932) and United States (1951) studies provided information on captive otter husbandry, setting the stage for eventual large-scale translocations as tools for population restoration. Early studies also informed effective housing of animals in...
Development of a HEC-RAS temperature model for the North Santiam River, northwestern Oregon
Adam J. Stonewall, Norman L. Buccola
2015, Open-File Report 2015-1006
A one-dimensional, unsteady streamflow and temperature model (HEC-RAS) of the North Santiam and Santiam Rivers was developed by the U.S. Geological Survey to be used in conjunction with previously developed two-dimensional hydrodynamic water-quality models (CE-QUAL-W2) of Detroit and Big Cliff Lakes upstream of the study area. In conjunction with the...
Late Quaternary chronostratigraphic framework of terraces and alluvium along the lower Ohio River, southwestern Indiana and western Kentucky, USA
Ronald C. Counts, Madhav K. Murari, Lewis A. Owen, Shannon Mahan, Michele Greenan
2015, Quaternary Science Reviews (110) 72-91
The lower Ohio River valley is a terraced fluvial landscape that has been profoundly influenced by Quaternary climate change and glaciation. A modern Quaternary chronostratigraphic framework was developed for the lower Ohio River valley using optically stimulated luminescence (OSL) dating and allostratigraphic mapping to gain insights into the nature of...
Roosting habitat use and selection by northern spotted owls during natal dispersal
Stan G. Sovern, Eric D. Forsman, Catherine M. Dugger, Margaret Taylor
2015, Journal of Wildlife Management (79) 254-262
We studied habitat selection by northern spotted owls (Strix occidentalis caurina) during natal dispersal in Washington State, USA, at both the roost site and landscape scales. We used logistic regression to obtain parameters for an exponential resource selection function based on vegetation attributes in roost and random plots in 76...
The roller coaster flight strategy of bar-headed geese conserves energy during Himalayan migrations
C.M. Bishop, R.J. Spivey, L. A. Hawkes, N. Batbayar, B. Chua, P.B. Frappell, W.K. Milsom, T. Natsagdorj, S. H. Newman, G. R. Scott, John Y. Takekawa, Martin Wikelski, Patrick J. Butler
2015, Science (347) 250-254
The physiological and biomechanical requirements of flight at high altitude have been the subject of much interest. Here, we uncover a steep relation between heart rate and wingbeat frequency (raised to the exponent 3.5) and estimated metabolic power and wingbeat frequency (exponent 7) of migratory bar-headed geese. Flight costs increase...
The effects of sample scheduling and sample numbers on estimates of the annual fluxes of suspended sediment in fluvial systems
Arthur J. Horowitz, Robin T. Clarke, Gustavo Henrique Merten
2015, Hydrological Processes (29) 531-543
Since the 1970s, there has been both continuing and growing interest in developing accurate estimates of the annual fluvial transport (fluxes and loads) of suspended sediment and sediment-associated chemical constituents. This study provides an evaluation of the effects of manual sample numbers (from 4 to 12 year−1) and sample scheduling (random-based,...
Evaluation of selected static methods used to estimate element mobility, acid-generating and acid-neutralizing potentials associated with geologically diverse mining wastes
Philip L. Hageman, Robert R. Seal, Sharon F. Diehl, Nadine M. Piatak, Heather Lowers
2015, Applied Geochemistry (57) 125-139
A comparison study of selected static leaching and acid–base accounting (ABA) methods using a mineralogically diverse set of 12 modern-style, metal mine waste samples was undertaken to understand the relative performance of the various tests. To complement this study, in-depth mineralogical studies were conducted in order to elucidate the relationships...
