Is sensitivity to anticoagulant rodenticides affected by repeated exposure in hawks?
Barnett Rattner
2018, Conference Paper, Proceedings of the Vertebrate Pest Conference
A seminal question in wildlife toxicology is whether exposure to an environmental contaminant, in particular a second-generation anticoagulant rodenticide, can evoke subtle long lasting effects on body condition, physiological function and survival. Many reports indicate that non-target predators often carry residues of several rodenticides, which is indicative of multiple exposures....
Quaternary sediment thickness and bedrock topography of the glaciated United States east of the Rocky Mountains
David R. Soller, Christopher P. Garrity
2018, Scientific Investigations Map 3392
Beginning roughly 2.6 million years ago, global climate entered a cooling phase known as the Pleistocene Epoch. As snow in northern latitudes compacted into ice several kilometers thick, it flowed as glaciers southward across the North American continent. These glaciers extended across the northern United States, dramatically altering the landscape...
Geology and assessment of undiscovered oil and gas resources of the Jan Mayen Microcontinent Province, 2008
Thomas E. Moore, Janet K. Pitman
Thomas E. Moore, D. L. Gautier, editor(s)
2018, Professional Paper 1824-L
The Jan Mayen Microcontinent encompasses a rectangular, mostly submarine fragment of continental crust that lies north of Iceland in the middle of the North Atlantic Ocean. These continental rocks were rifted away from the eastern margin of Greenland as a consequence of a westward jump of spreading centers from...
The 3D Elevation Program—Flood risk management
Carswell Jr., Vicki Lukas
2018, Fact Sheet 2017-3081
Flood-damage reduction in the United States has been a longstanding but elusive societal goal. The national strategy for reducing flood damage has shifted over recent decades from a focus on construction of flood-control dams and levee systems to a three-pronged strategy to (1) improve the design and operation of such...
Globally sourced mineral commodities used in U.S. Navy SEAL gear—An illustration of U.S. net import reliance
Jamie Brainard, Nedal T. Nassar, Joseph Gambogi, Michael S. Baker, Michael T. Jarvis
2018, General Information Product 183
A U.S. Navy SEAL (an acronym for sea, air, land) carries gear containing at least 23 nonfuel mineral commodities for which the United States is greater than 50 percent net import reliant. The graphics display the leading world producers of selected nonfuel mineral commodities used to manufacture U.S. Navy SEAL...
Monitoring dynamic spatio-temporal ecological processes optimally
Perry J. Williams, Mevin Hooten, Jamie N. Womble, George G. Esslinger, Michael R. Bower
2018, Ecology (99) 524-535
Population dynamics vary in space and time. Survey designs that ignore these dynamics may be inefficient and fail to capture essential spatio‐temporal variability of a process. Alternatively, dynamic survey designs explicitly incorporate knowledge of ecological processes, the associated uncertainty in those processes, and can be optimized with respect to monitoring...
Spatial and temporal variability in growth of giant gartersnakes: Plasticity, precipitation, and prey
Jonathan P. Rose, Brian J. Halstead, Glenn D. Wylie, Michael L. Casazza
2018, Journal of Herpetology (52) 40-49
The growth rate of reptiles is plastic and often varies among individuals, populations, and years in response to environmental conditions. For an imperiled species, the growth rate of individual animals is an important component of demographic models, and changes in individual growth rates might precede changes in abundance. We analyzed...
Public views of wetlands and waterfowl conservation in the United States—Results of a survey to inform the 2018 update of the North American Waterfowl Management Plan
Emily J. Wilkins, Holly M. Miller
2018, Open-File Report 2017-1148
Executive SummaryThis report provides information from a general public survey conducted in early 2017 to help inform the North American Waterfowl Management Plan (NAWMP) 2018 update. This report is intended for use by the NAWMP advisory committees and anyone interested in the human dimensions of wetlands and waterfowl management. A...
Pleistocene glaciation of the Jackson Hole area, Wyoming
Kenneth L. Pierce, Joseph M. Licciardi, John M. Good, Cheryl Jaworowski
2018, Professional Paper 1835
Pleistocene glaciations and late Cenozoic offset on the Teton fault have played central roles in shaping the scenic landscapes of the Teton Range and Jackson Hole area in Wyoming. The Teton Range harbored a system of mountain-valley glaciers that produced the striking geomorphic features in these mountains. However, the comparatively...
Simulated hydrologic response to climate change during the 21st century in New Hampshire
David M. Bjerklie, Luke P. Sturtevant
2018, Scientific Investigations Report 2017-5143
The U.S. Geological Survey, in cooperation with the New Hampshire Department of Environmental Services and the Department of Health and Human Services, has developed a hydrologic model to assess the effects of short- and long-term climate change on hydrology in New Hampshire. This report documents the model and datasets developed...
Flood-inundation maps for the Patoka River in and near Jasper, southwestern Indiana
Kathleen K. Fowler
2018, Scientific Investigations Report 2017-5138
Digital flood-inundation maps for a 9.5-mile reach of the Patoka River in and near the city of Jasper, southwestern Indiana (Ind.), from the streamgage near County Road North 175 East, downstream to State Road 162, were created by the U.S. Geological Survey (USGS) in cooperation with the Indiana Department of...
Estimating population extinction thresholds with categorical classification trees for Louisiana black bears
Jared S. Laufenberg, Joseph D. Clark, Richard B. Chandler
2018, PLoS ONE (13)
Monitoring vulnerable species is critical for their conservation. Thresholds or tipping points are commonly used to indicate when populations become vulnerable to extinction and to trigger changes in conservation actions. However, quantitative methods to determine such thresholds have not been well explored. The Louisiana black bear (Ursus americanus luteolus) was...
Summary of wildlife-related research on the coastal plain of the Arctic National Wildlife Refuge, Alaska, 2002–17
John M. Pearce, Paul L. Flint, Todd C. Atwood, David C. Douglas, Layne G. Adams, Heather E. Johnson, Stephen M. Arthur, Christopher J. Latty
2018, Open-File Report 2018-1003
We summarize recent (2002–17) publicly available information from studies within the 1002 Area of the Arctic National Wildlife Refuge as well as terrestrial and coastal ecosystems elsewhere on the Arctic Coastal Plain that are relevant to the 1002 Area. This report provides an update on earlier research summaries on caribou...
Effects of water level and climate on the hydrodynamics and water quality of Anvil Lake, Wisconsin, a shallow seepage lake
Dale M. Robertson, Paul F. Juckem, Eric D. Dantoin, Luke A. Winslow
2018, Lake and Reservoir Management (34) 211-231
Interannual differences in the water quality of Anvil Lake, Wisconsin, were examined to determine how water level and climate affect the hydrodynamics and trophic state of shallow lakes, and their importance compared to anthropogenic changes in the watershed. Anvil Lake is a relatively pristine seepage lake with hydrology dominated by...
Downscaling future climate change projections over Puerto Rico using a non-hydrostatic atmospheric model
Amit Bhardwaj, Vasubandhu Misra, A. Mishra, Adrienne Wootten, Ryan P. Boyles, J.H. Bowden, Adam J. Terando
2018, Climatic Change (147) 133-147
We present results from 20-year “high-resolution” regional climate model simulations of precipitation change for the sub-tropical island of Puerto Rico. The Japanese Meteorological Agency Non-Hydrostatic Model (NHM) operating at a 2-km grid resolution is nested inside the Regional Spectral Model (RSM) at 10-km grid resolution, which in turn is forced...
Temperate and tropical forest canopies are already functioning beyond their thermal thresholds for photosynthesis
Alida C. Mau, Sasha C. Reed, Tana E. Wood, Molly A. Cavaleri
2018, Forests (9)
Tropical tree species have evolved under very narrow temperature ranges compared to temperate forest species. Studies suggest that tropical trees may be more vulnerable to continued warming compared to temperate species, as tropical trees have shown declines in growth and photosynthesis at elevated temperatures. However, regional and global vegetation models...
Evaluation of a decoy-only public good hunting opportunity in central South Dakota: The role of harvest success on hunter satisfaction
Larry M. Gigliotti
2018, Conference Paper, Proceedings of the South Dakota Academy of Science
An important measure of success for wildlife managers is hunter satisfaction, and it often has been assumed that harvest success is related to satisfaction and may even be a surrogate measure for hunter satisfaction. However, introduction of the multiple satisfactions concept, showing that hunters seek and receive a number of...
A comparative evaluation of crowding stress on muscle HSP90 and myostatin expression in salmonids
Nicholas J. Galt, Jacob Michael Froehlich, Stephen D. McCormick, Peggy R. Biga
2018, Aquaculture (483) 141-148
Stress is a major factor that contributes to poor production and animal welfare concerns in aquaculture. As such, a thorough understanding of mechanisms involved in the stress response is imperative to developing strategies to mitigate the negative side effects of stressors, including the impact of high stocking densities on growth....
Near-surface permafrost aggradation in Northern Hemisphere peatlands shows regional and global trends during the past 6000 years
Claire C. Treat, Miriam Jones
2018, The Holocene (28) 998-1010
The history of permafrost aggradation and thaw in northern peatlands can serve as an indicator of regional climatic history in regions where records are sparse. We infer regional trends in the timing of permafrost aggradation and thaw in North American and Eurasian peatland ecosystems based on plant macrofossils and peat...
VS2DRTI: Simulating heat and reactive solute transport in variably saturated porous media
Richard W. Healy, Sosina S. Haile, David L. Parkhurst, Scott R. Charlton
2018, Groundwater (56) 810-815
Variably saturated groundwater flow, heat transport, and solute transport are important processes in environmental phenomena, such as the natural evolution of water chemistry of aquifers and streams, the storage of radioactive waste in a geologic repository, the contamination of water resources from acid-rock drainage, and the...
Characterizing drought in California: new drought indices and scenario-testing in support of resource management
Lorraine E. Flint, Alan L. Flint, John Mendoza, Julie Kalansky, F. M. Ralph
2018, Ecological Processes (7) 1-13
IntroductionCalifornia’s recent drought (2012–2016) has implications throughout the state for natural resource management and adaptation planning and has generated many discussions about drought characterization and recovery. This study characterizes drought conditions with two indices describing deficits in natural water supply and increases in landscape stress...
Land use diversification and intensification on elk winter range in Greater Yellowstone: A framework and agenda for social-ecological research
Julia Hobson Haggerty, Kathleen Epstein, Michael Stone, Paul C. Cross
2018, Rangeland Ecology and Management (71) 171-174
Amenity migration describes the movement of peoples to rural landscapes and the transition toward tourism and recreation and away from production-oriented land uses (ranching, timber harvesting). The resulting mosaic of land uses and community structures has important consequences for wildlife and their management. This research note examines amenity-driven changes to...
The U.S. Geological Survey’s Gas Hydrates Project
Carolyn D. Ruppel
2018, Fact Sheet 2017-3079
The Gas Hydrates Project at the U.S. Geological Survey (USGS) focuses on the study of methane hydrates in natural environments. The project is a collaboration between the USGS Energy Resources and the USGS Coastal and Marine Geology Programs and works closely with other U.S. Federal agencies, some State governments, outside...
Gas hydrate in nature
Carolyn D. Ruppel
2018, Fact Sheet 2017-3080
Gas hydrate is a naturally occurring, ice-like substance that forms when water and gas combine under high pressure and at moderate temperatures. Methane is the most common gas present in gas hydrate, although other gases may also be included in hydrate structures, particularly in areas close to conventional oil and...
Hydrogeologic framework and groundwater conditions of the Ararat Basin in Armenia
Joshua F. Valder, Janet M. Carter, Colton J. Medler, Ryan F. Thompson, Mark T. Anderson
2018, Scientific Investigations Report 2017-5163
Armenia is a landlocked country located in the mountainous Caucasus region between Asia and Europe. It shares borders with the countries of Georgia on the north, Azerbaijan on the east, Iran on the south, and Turkey and Azerbaijan on the west. The Ararat Basin is a transboundary basin in Armenia...
