Assessing the lead solubility potential of untreated groundwater of the United States
Bryant Jurgens, David L. Parkhurst, Kenneth Belitz
2019, Environmental Science & Technology (53) 3095-3103
In the U.S., about 44 million people rely on self-supplied groundwater for drinking water. Because most self-supplied homeowners do not treat their water to control corrosion, drinking water can be susceptible to lead (Pb) contamination from metal plumbing. To assess the types and locations of susceptible groundwater, a geochemical reaction...
An assessment of plant species differences on cellulose oxygen isotopes from two Kenai Peninsula, Alaska peatlands: Implications for hydroclimatic reconstructions
Miriam Jones, Lesleigh Anderson, Katherine Keller, Bailey Nash, Virginia Littell, Matthew J. Wooller, Chelsea Jolley
2019, Frontiers in Earth Science (7)
Peat cores are valuable archives of past environmental change because they accumulate plant organic matter over millennia. While studies have primarily focused on physical, ecological, and some biogeochemical proxies, cores from peatlands have increasingly been used to interpret hydroclimatic change using stable isotope analyses of cellulose preserved in plant remains....
Hormones and pharmaceuticals in groundwater used as a source of drinking water across the United States
Laura M. Bexfield, Patricia Toccalino, Kenneth Belitz, William T. Foreman, Edward Furlong
2019, Environmental Science & Technology (53) 2950-2960
This is the first large-scale, systematic assessment of hormone and pharmaceutical occurrence in groundwater used for drinking across the United States. Samples from 1091 sites in Principal Aquifers representing 60% of the volume pumped for drinking-water supply had final data for 21 hormones and 103 pharmaceuticals. At least one compound...
Modeling connectivity of non‐floodplain wetlands: Insights, approaches, and recommendations
C. Nathan Jones, Ali A. Ameli, Brian Neff, Grey R. Evenson, Daniel L. McLaughlin, Heather E. Golden, Charles R. Lane
2019, Journal of the American Water Resources Association (JAWRA) (55) 559-577
Representing hydrologic connectivity of non‐floodplain wetlands (NFWs) to downstream waters in process‐based models is an emerging challenge relevant to many research, regulatory, and management activities. We review four case studies that utilize process‐based models developed to simulate NFW hydrology. Models range from a simple, lumped parameter...
GPS tracking data reveals daily spatio-temporal movement patterns of waterfowl
Fiona McDuie, Michael L. Casazza, Cory T. Overton, Mark P. Herzog, C. Alex Hartman, Sarah H. Peterson, Cliff L. Feldheim, Joshua T. Ackerman
2019, Movement Ecology (7) 1-17
BackgroundSpatio-temporal patterns of movement can characterize relationships between organisms and their surroundings, and address gaps in our understanding of species ecology, activity budgets, bioenergetics, and habitat resource management. Highly mobile waterfowl, which can exploit resources over large spatial extents, are excellent models to understand relationships...
Geology and assessment of undiscovered oil and gas resources of the Vilkitskii Basin Province, 2008
Kenneth J. Bird, David W. Houseknecht, Janet K. Pitman
Thomas E. Moore, Donald L. Gautier, editor(s)
2019, Professional Paper 1824-Z
The Vilkitskii Basin is a separate petroleum province that lies beneath the continental shelf of the East Siberian Sea east of the New Siberian Islands and northwest of Wrangel Island. It is a basin known only on the basis of gravity data and three seismic profiles. A small, southern part...
Two-dimensional seismic velocities and structural variations at three British Columbia Hydro and Power Authority (BC Hydro) dam sites, Vancouver Island, British Columbia, Canada
Rufus D. Catchings, Kofi O. Addo, Mark R. Goldman, Joanne H. Chan, Robert R. Sickler, Coyn J. Criley
2019, Open-File Report 2019-1015
SummaryIn June, 2017, we acquired seismic data along five linear profiles at three British Columbia Hydro and Power Authority (BC Hydro, a Canadian provincial Crown Corporation) dam sites (John Hart, Ladore, and Strathcona Dams) on Vancouver Island, British Columbia, Canada. We also attempted to acquire linear seismic profiles at two...
Hydromechanical earthquake nucleation model forecasts onset, peak, and falling rates of induced seismicity in Oklahoma and Kansas
Jack Norbeck, Justin L. Rubinstein
2019, Geophysical Research Letters (45) 2963-2975
The earthquake activity in Oklahoma and Kansas that began in 2008 reflects the most widespread instance of induced seismicity observed to date. We develop a reservoir model to calculate the hydrologic conditions associated with the activity of 902 saltwater disposal wells injecting into the Arbuckle aquifer. Estimates...
Lightning effects on the grain size distribution of volcanic ash
Kimberly Genareau, Kristi L. Wallace, Pedram Gharghabi, James Gafford
2019, Geophysical Research Letters (46) 3133-3141
Natural volcanic ashfall samples were examined, and high-current (~100 kA) electrical impulse experiments were conducted to reveal the changes in grain size that can occur during lightning discharge. Experiments on pseudo ash samples manufactured from volcanic deposits of both rhyolitic and basaltic composition show that aggregates of very...
Modelling for catchment management
Aroon Parshotam, Dale M. Robertson
David P. Hamilton, Kevin J. Collier, John M. Quinn, Clive Howard-Williams, editor(s)
2019, Book chapter, Lake restoration handbook
Catchment models are useful tools to help describe and quantify the sources, transport, and fate of sediment, nutrients, and other constituents in a landscape. Results from catchment models are used to quantify and understand existing conditions and used in restoration efforts by defining areas with highest contributions (hotspots, where actions...
Patterns of big sagebrush plant community composition and stand structure in the western United States
Victoria E. Pennington, John B. Bradford, Kyle A. Palmquist, Rachel R. Renne, William K. Lauenroth
2019, Rangeland Ecology and Management (72) 505-514
Big sagebrush (Artemisia tridentata Nutt.) plant communities are found in western North America and comprise a mix of shrubs, forbs, and grasses. Climate, topography, and soil water availability are important factors that shape big sagebrush stand structure and plant community composition; however, most studies have focused on understanding these relationships at sites in a small portion of...
Trends in landbird density at two national parks in fragmented, mixed-use landscapes of the Pacific Northwest
Chris Ray, Mandy Holmgren, Robert L. Wilkerson, Rodney B. Siegel, John R. Boetsch, Kurt J. Jenkins, Jason I. Ransom
M. Holmgren, R. Wilkerson, R. Siegel, J. Ransom, Kurt J. Jenkins, J. Boetsch, editor(s)
2019, Northwestern Naturalist (100) 1-25
National parks play a key role in conserving species by providing landscapes where threats from anthropogenic disturbance are reduced. In a recent study of 3 large wilderness parks in the Pacific Northwest, nearly all landbird species were found to be stable or increasing. Nonetheless, contemporary results from the Breeding Bird...
Physical, biogeochemical, and meteorological factors responsible for interannual changes in cyanobacterial community composition and biovolume over two decades in a eutrophic lake
Chelsea A. Weirich, Dale M. Robertson, Todd R. Miller
2019, Hydrobiologia (828) 165-182
This study used a 20-year dataset (1995–2014) to identify factors affecting cyanobacterial community composition (CCC) and abundance in a eutrophic lake. We hypothesized that differences in thermal structure, nutrients, and meteorology drive interannual variability in CCC and abundance. Cluster analysis differentiated dominant cyanobacteria into rare, low abundance, or sporadically occurring...
Isotopic and petrologic investigation, and a thermomechanical model of genesis of large-volume rhyolites in arc environments: Karymshina Volcanic Complex, Kamchatka, Russia
Ilya N. Bindeman, Vladimir L. Leonov, Dylan P. Colon, Aleksey N. Rogozin, Niccole Shipley, Brian Jicha, Matthew W. Loewen, Taras V. Gerya
2019, Frontiers in Earth Science (6)
The Kamchatka Peninsula of eastern Russia is currently one of the most volcanically active areas on Earth where a combination of >8 cm/yr subduction convergence rate and thick continental crust generates large silicic magma chambers, reflected by abundant large calderas and caldera complexes. This study examines the largest center of...
Influenza A prevalence and subtype diversity in migrating teal sampled along the United States Gulf Coast
Deborah Carter, Paul T. Link, Patrick Walther, Andrew M. Ramey, David E. Stallknecht, Rebecca L. Poulson
2019, Avian Diseases (63) 165-171
Wild birds in the order Anseriformes are important reservoirs for influenza A viruses (IAV); however, IAV prevalence and subtype diversity may vary by season, even at the same location. To better understand the ecology of IAV during waterfowl migration through the Gulf Coast of the United States (Louisiana and Texas),...
Carbon accumulation and vertical accretion in a restored vs. historic salt marsh in southern Puget Sound, Washington, United States
Judith Z. Drexler, Isa Woo, Christopher C. Fuller, Glynnis Nakai
2019, Restoration Ecology (27) 1117-1127
Few comparisons exist between vertical accretion (VA) and carbon accumulation rates (CARs), in restored vs. historic (i.e., reference) marshes. Here we compare these processes in a formerly diked, sparsely vegetated, restored salt marsh (Six Gill Slough, SG), whose surface is subsided relative to the tidal frame, to an adjacent,...
Unprocessed atmospheric nitrate in waters of the Northern Forest Region in the USA and Canada
Stepen D Sebestyen, Donald D Ross, James B. Shanley, Emily M. Elliott, Carol Kendall, John L. Campbell, D Bryan Dail, Ivan J Fernandez, Christine L Goodale, Gregory B. Lawrence, Gary M. Lovett, Patrick J McHale, Myron J Mitchell, Sarah J. Nelson, Michelle D Shattuck, Trent R Wickman, Rebecca T. Barnes, Joel T. Bostic, Anthony R Buda, Douglas A Burns, Keith N. Eshleman, Jacques C. Finlay, David M. Nelson, Nobuhito Ohte, Linda H Pardo, Lucy A Rose, Robert J Sabo, Sherry L. Schiff, John Spoelstra, Karl W Williard
2019, Environmental Science and Technology (53) 3620-3633
Little is known about the regional extent and variability of nitrate from atmospheric deposition that is transported to streams without biological processing in forests. We measured water chemistry and isotopic tracers (δ18O and δ15N) of nitrate sources across the Northern Forest...
U.S. Geological Survey—Northern Prairie Wildlife Research Center 2017 research activity report
Mark H. Sherfy, editor(s)
2019, Circular 1451
The mission of Northern Prairie Wildlife Research Center is to provide scientific information needed to conserve and manage the Nation’s natural capital for current and future generations, with an emphasis on migratory birds, Department of the Interior trust resources, and ecosystems of the Nation’s interior. This report provides an overview of...
Climate change effects on deer and moose in the midwest
Sarah R. Weiskopf, Olivia E. LeDee, Laura M. Thompson
2019, Journal of Wildlife Management (83) 769-781
Climate change is an increasing concern for wildlife managers across the United States and Canada. Because climate change may alter populations and harvest dynamics of key species in the region, midwestern states have identified the effects of climate change on ungulates as a priority research area. We conducted a literature...
The plant diversity sampling design for The National Ecological Observatory Network
David T. Barnett, Peter B. Adler, Benjamin R. Chemel, Paul A. Duffy, Brian J. Enquist, James B. Grace, Susan P. Harrison, Robert K. Peet, David S. Schimel, Thomas J. Stohlgren, Mark Vellend
2019, Ecosphere (10) 1-18
The National Ecological Observatory Network (NEON) is designed to facilitate an understanding of the impact of environmental change on ecological systems. Observations of plant diversity—responsive to changes in climate, disturbance, and land use, and ecologically linked to soil, biogeochemistry, and organisms—result in NEON data products that cross a range of...
Heat and mass transport in a vapor-dominated hydrothermal area in Yellowstone National Park, USA: Inferences from magnetic, electrical, electromagnetic, subsurface temperature and diffuse CO2 flux measurements
Claire Bouligand, Shaul Hurwitz, Jean Vandemeulebrouck, Svetlana Byrdina, Mason A. Kass, Jennifer L. Lewicki
2019, Journal of Geophysical Research B: Solid Earth (124) 291-309
Vapor‐dominated hydrothermal systems are characterized by localized and elevated heat and gas flux. In these systems, steam and gas ascend from a boiling water reservoir, steam condenses beneath a low‐permeability cap layer, and liquid water descends, driven by gravity (“heat pipe” model). We combine magnetic, electromagnetic, and geoelectrical methods and...
Assessment of Columbia and Willamette River flood stage on the Columbia Corridor Levee System at Portland, Oregon, in a future climate
Susan A. Wherry, Tamara M. Wood, Hans R. Moritz, Keith B. Duffy
2019, Scientific Investigations Report 2018-5161
To support Levee Ready Columbia’s (LRC’s) effort to re-certify levees along the Columbia and Willamette Rivers and remain accredited, two 2-dimensional hydraulic models, Adaptive Hydraulics and Delft3D-Flexible Mesh, were used to simulate the effects of plausible extreme high water during the 2030 to 2059 period. The Columbia River was simulated...
Arizona hedgehog cactus (Echinocereus triglochidiatus var. arizonicus)—A systematic data assessment in support of recovery
Kathryn A. Thomas, Daniel F. Shryock, Todd Esque
2019, Open-File Report 2019-1004
The Arizona hedgehog cactus (Echinocereus triglochidiatus var. arizonicus) is endemic to central Arizona in Gila and Pinal Counties, and has been federally listed as endangered by the U.S. Fish and Wildlife Service (FWS) since 1979. Mining, mineral exploration, and highway development have resulted in habitat degradation and loss of...
Evidence of age-related improvement in the foraging efficiency of Adélie penguins
Amélie Lescroël, Grant Ballard, Melanie Massaro, Katie Dugger, Scott Jennings, Annie M. Pollard, Elizabeth L. Porzig, Annie Schmidt, Arvind Varsani, David Gremillet, David G. Ainley
2019, Scientific Reports (9)
Age variation in reproductive performance is well-documented but the mechanisms underlying this variation remain unclear. Foraging efficiency is likely to be a key source of demographic variation as it determines the amount of energy that can be invested in fitness-related activities. Evidence of age-related changes in...
Metabolic rhythms in flowing waters: An approach for classifying river productivity regimes
Philip Savoy, Emily S. Bernhardt, Alison P. Appling, James B. Heffernan, Edward G. Stets, Jordan S. Read, Judson Harvey
2019, Limnology and Oceanography (64) 1835-1851
Although seasonal patterns of ecosystem productivity have been extensively described and analyzed with respect to their primary forcings in terrestrial and marine systems, comparatively little is known about these same processes in rivers. However, it is now possible to perform a large‐scale synthesis on the patterns and drivers of river...
