Conceptual models of the formation of acid-rock drainage at road cuts in Tennessee
Mike Bradley, Scott Worland, Tom Byl
2015, Conference Paper, Proceedings of the 2015 Tennessee Water Resources Symposium
Pyrite and other minerals containing sulfur and trace metals occur in several rock formations throughout Middle and East Tennessee. Pyrite (FeS2) weathers in the presence of oxygen and water to form iron hydroxides and sulfuric acid. The weathering and interaction of the acid on the rocks and other minerals at...
Are conservation organizations configured for effective adaptation to global change?
Paul R. Armsworth, Eric R. Larson, Stephen T. Jackson, Dov F. Sax, Paul W. Simonin, Bernd Blossey, Nancy Green, Mary L. Klein, Liza Lester, Taylor H. Ricketts, Michael C. Runge, M. Rebecca Shaw
2015, Frontiers in Ecology and the Environment (13) 163-169
Conservation organizations must adapt to respond to the ecological impacts of global change. Numerous changes to conservation actions (eg facilitated ecological transitions, managed relocations, or increased corridor development) have been recommended, but some institutional restructuring within organizations may also be needed. Here we discuss the capacity of conservation organizations to...
Multilevel groundwater monitoring of hydraulic head and temperature in the eastern Snake River Plain aquifer, Idaho National Laboratory, Idaho, 2011-13
Brian V. Twining, Jason C. Fisher
2015, Scientific Investigations Report 2015-5042
From 2011 to 2013, the U.S. Geological Survey’s Idaho National Laboratory (INL) Project Office, in cooperation with the U.S. Department of Energy, collected depth-discrete measurements of fluid pressure and temperature in 11 boreholes located in the eastern Snake River Plain aquifer. Each borehole was instrumented with a multilevel monitoring system...
Mass-movement deposits in the lacustrine Eocene Green River Formation, Piceance Basin, western Colorado
Ronald C. Johnson, Justin E. Birdwell, Michael E. Brownfield, Tracey J. Mercier
2015, Open-File Report 2015-1044
The Eocene Green River Formation was deposited in two large Eocene saline lakes, Lake Uinta in the Uinta and Piceance Basins and Lake Gosiute in the Greater Green River Basin. Here we will discuss mass-movement deposits in just the Piceance Basin part of Lake Uinta....
An evaluation of the accuracy of modeled and computed streamflow time-series data for the Ohio River at Hannibal Lock and Dam and at a location upstream from Sardis, Ohio
G. F. Koltun
2015, Open-File Report 2015-1058
Between July 2013 and June 2014, the U.S. Geological Survey (USGS) made 10 streamflow measurements on the Ohio River about 1.5 miles (mi) downstream from the Hannibal Lock and Dam (near Hannibal, Ohio) and 11 streamflow measurements near the USGS Sardis gage (station number 03114306) located approximately 2.4 mi upstream...
Do management actions to restore rare habitat benefit native fish conservation? Distribution of juvenile native fish among shoreline habitats of the Colorado River
Michael J. Dodrill, Charles B. Yackulic, Brandon Gerig, William E. Pine III, Josh Korman, Colton Finch
2015, River Research and Applications (31) 1203-1217
Many management actions in aquatic ecosystems are directed at restoring or improving specific habitats to benefit fish populations. In the Grand Canyon reach of the Colorado River, experimental flow operations as part of the Glen Canyon Dam Adaptive Management Program have been designed to restore sandbars and associated backwater habitats....
Not putting all their eggs in one basket: bet-hedging despite extraordinary annual reproductive output of desert tortoises
Jeffrey E. Lovich, Joshua R. Ennen, Charles B. Yackulic, Kathie Meyer-Wilkins, Mickey Agha, Caleb L. Loughran, Curtis Bjurlin, Meaghan Austin, Sheila V. Madrak
2015, Biological Journal of the Linnean Society (115) 399-410
Bet-hedging theory makes the counter-intuitive prediction that, if juvenile survival is low and unpredictable, organisms should consistently reduce short-term reproductive output to minimize the risk of reproductive failure in the long-term. We investigated the long-term reproductive output of an Agassiz's desert tortoise (Gopherus agassizii) population and conformance to a bet-hedging...
Efficacy of Pseudomonas fluorescens strain CL145A spray dried powder for controlling zebra mussels adhering to native unionid mussels within field enclosures
James A. Luoma, Kerry L. Weber, Todd J. Severson, Denise A. Mayer
2015, Open-File Report 2015-1051
The efficacy of a commercially prepared spray dried powder (SDP) formulation of Pseudomonas fluorescens (strain CL145A) was evaluated for removing zebra mussels (Dreissena polymorpha) adhering to a population of unionid mussels in Lake Darling (Alexandria, Minnesota). Two groups of unionid mussels were used in the study. Unionid mussels were collected near the...
The Pacific northwest stream quality assessment
Peter C. Van Metre, Jennifer L. Morace, Rich W. Sheibley
2015, Fact Sheet 2015-3020
In 2015, the U.S. Geological Survey (USGS) National Water-Quality Assessment (NAWQA) program is assessing stream quality in the Pacific Northwest. The goals of the Pacific Northwest Stream Quality Assessment (Pacific Northwest study) are to assess the quality of streams in the region by characterizing multiple water-quality factors that are stressors...
A method for determining average beach slope and beach slope variability for U.S. sandy coastlines
Kara S. Doran, Joseph W. Long, Jacquelyn R. Overbeck
2015, Open-File Report 2015-1053
The U.S. Geological Survey (USGS) National Assessment of Hurricane-Induced Coastal Erosion Hazards compares measurements of beach morphology with storm-induced total water levels to produce forecasts of coastal change for storms impacting the Gulf of Mexico and Atlantic coastlines of the United States. The wave-induced water level component (wave setup and...
Managing habitat to slow or reverse population declines of the Columbia spotted frog in the Northern Great Basin
David S. Pilliod, Richard D. Scherer
2015, Journal of Wildlife Management (79) 579-590
Evaluating the effectiveness of habitat management actions is critical to adaptive management strategies for conservation of imperiled species. We quantified the response of a Great Basin population of the Columbia spotted frog (Rana luteiventris) to multiple habitat improvement actions aimed to reduce threats and reverse population declines. We used mark-recapture...
Desert tortoise use of burned habitat in the Eastern Mojave desert
K. Kristina Drake, Todd C. Esque, Kenneth E. Nussear, Lesley DeFalco, Sara J. Scoles-Sciulla, Andrew T. Modlin, Philip A. Medica
2015, Journal of Wildlife Management (79) 618-629
Wildfires burned 24,254 ha of critical habitat designated for the recovery of the threatened Mojave desert tortoise (Gopherus agassizii) in southern Nevada during 2005. The proliferation of non-native annual grasses has increased wildfire frequency and extent in recent decades and continues to accelerate the conversion of tortoise habitat across the Mojave...
Can polar bears use terrestrial foods to offset lost ice-based hunting opportunities?
Karyn D. Rode, Charles T. Robbins, Lynne Nelson, Steven C. Amstrup
2015, Frontiers in Ecology and the Environment (13) 138-145
Increased land use by polar bears (Ursus maritimus) due to climate-change-induced reduction of their sea-ice habitat illustrates the impact of climate change on species distributions and the difficulty of conserving a large, highly specialized carnivore in the face of this global threat. Some authors have suggested that terrestrial food consumption...
A sea-level database for the Pacific coast of central North America
Simon E. Engelhart, Matteo Vacchi, Benjamin P. Horton, Alan R. Nelson, Robert E. Kopp
2015, Quaternary Science Reviews (113) 78-92
A database of published and new relative sea-level (RSL) data for the past 16 ka constrains the sea-level histories of the Pacific coast of central North America (southern British Columbia to central California). Our reevaluation of the stratigraphic context and radiocarbon age of sea-level indicators from geological and archaeological investigations yields...
Sampling animal sign in heterogeneous environments: how much is enough?
Joseph D. Holbrook, Robert S. Arkle, Janet L. Rachlow, Kerri T. Vierling, David S. Pilliod
2015, Journal of Arid Environments (119) 51-55
Animal ecologists often use animal sign as a surrogate for direct observation of organisms, especially when species are secretive or difficult to observe. Spatial heterogeneity in arid environments makes it challenging to consistently detect and precisely characterize animal sign, which can bias estimates of animal abundance or habitat use. Piute...
Patterns and causes of observed piñon pine mortality in the southwestern United States
Arjan J.H. Meddens, Jeff H. Hicke, Alison K. Macalady, P.C. Buotte, T.R. Cowles, Craig D. Allen
2015, New Phytologist (206) 91-97
Recently, widespread piñon pine die-off occurred in the southwestern United States. Here we synthesize observational studies of this event and compare findings to expected relationships with biotic and abiotic factors. Agreement exists on the occurrence of drought, presence of bark beetles and increased mortality of larger trees. However, studies disagree...
Targeting climate diversity in conservation planning to build resilience to climate change
Nicole E. Heller, Jason R. Kreitler, David Ackerly, Stuart Weiss, Amanda Recinos, Ryan Branciforte, Lorraine E. Flint, Alan L. Flint, Elisabeth Micheli
2015, Ecosphere (6) 1-20
Climate change is raising challenging concerns for systematic conservation planning. Are methods based on the current spatial patterns of biodiversity effective given long-term climate change? Some conservation scientists argue that planning should focus on protecting the abiotic diversity in the landscape, which drives patterns of biological diversity, rather than focusing...
Developing objectives with multiple stakeholders: adaptive management of horseshoe crabs and Red Knots in the Delaware Bay
Conor P. McGowan, James E. Lyons, David Smith
2015, Environmental Management (55) 972-982
Structured decision making (SDM) is an increasingly utilized approach and set of tools for addressing complex decisions in environmental management. SDM is a value-focused thinking approach that places paramount importance on first establishing clear management objectives that reflect core values of stakeholders. To be useful for management, objectives must be...
Soil respiration patterns and controls in limestone cedar glades
Jennifer M. Cartwright, Dafeng Hui
2015, Plant and Soil (389) 157-169
Aims Drivers of soil respiration (Rs) in rock outcrop ecosystems remain poorly understood. We investigated these drivers in limestone cedar glades, known for their concentrations of endemic plant species and for seasonal hydrologic extremes (xeric and saturated conditions), and compared our findings to those in temperate grasslands and semi-arid ecosystems. Methods We measured...
Summer diel diet and feeding periodicity of four species of cyprinids in the Salmon River, New York
James H. Johnson
2015, American Midland Naturalist (173) 326-334
The diel diet composition and feeding periodicity of Luxilus cornutus (common shiner), Exoglossum maxillingua (cutlip minnow), Semotilus corporalis (fallfish), and Notropis hudsonius (spottail shiner) were examined in the Salmon River, New York over a 24 h period during the summer. Chironomids were the major prey of common shiner (60.6%) and...
Terrestrial ecology of semi-aquatic giant gartersnakes (Thamnophis gigas)
Brian J. Halstead, Shannon M. Skalos, Glenn D. Wylie, Michael L. Casazza
2015, Herpetological Conservation and Biology (10) 633-644
Wetlands are a vital component of habitat for semiaquatic herpetofauna, but for most species adjacent terrestrial habitats are also essential. We examined the use of terrestrial environments by Giant Gartersnakes (Thamnophis gigas) to provide behavioral information relevant to conservation of this state and federally listed threatened species. We used radio...
Hydrologic conditions in Massachusetts during water year 2014
Richard J. Verdi
2015, Open-File Report 2015-1056
Hydrologic data and conditions throughout Massachusetts during water year 2014 (October 1, 2013, to September 30, 2014) are presented in this report. Stream discharge and groundwater levels during water year 2014 varied geographically across the State. The data are described as being above, below, or near normal in relation to...
Radar attenuation and temperature within the Greenland Ice Sheet
Joseph A MacGregor, Jilu Li, John D Paden, Ginny A Catania, Gary D. Clow, Mark A Fahnestock, Prasad S. Gogineni, Robert E. Grimm, Mathieu Morlighem, Soumyaroop Nandi, Helene Seroussi, David E Stillman
2015, Journal of Geophysical Research F: Earth Surface (120) 1-26
The flow of ice is temperature-dependent, but direct measurements of englacial temperature are sparse. The dielectric attenuation of radio waves through ice is also temperature-dependent, and radar sounding of ice sheets is sensitive to this attenuation. Here we estimate depth-averaged radar-attenuation rates within the Greenland Ice Sheet from airborne radar-sounding...
Evaluation of the Ott Hydromet Qliner for measuring discharge in laboratory and field conditions
Jason C. McVay
2015, Open-File Report 2015-1052
The U.S. Geological Survey, in collaboration with the University of Iowa IIHR – Hydroscience and Engineering, evaluated the use of the Ott Hydromet Qliner using laboratory flume tests along with field validation tests. Analysis of the flume testing indicates the velocities measured by the Qliner at a 40-second exposure time...
Geologic control on the evolution of the inner shelf morphology offshore of the Mississippi barrier islands, northern Gulf of Mexico, USA
James G. Flocks, Jack L. Kindinger, Kyle W. Kelso
2015, Continental Shelf Research (101) 59-70
Between 2008 and 2013, high-resolution geophysical surveys were conducted around the Mississippi barrier islands and offshore. The sonar surveys included swath and single-beam bathymetry, sidescan, and chirp subbottom data collection. The geophysical data were groundtruthed using vibracore sediment collection. The results provide insight into the evolution of the inner shelf...
