Cessation of oil exposure in harlequin ducks after the Exxon Valdez oil spill: Cytochrome P4501A biomarker evidence
Daniel Esler, Brenda E. Ballachey, Lizabeth Bowen, A. Keith Miles, Rian D. Dickson, John D. Henderson
2017, Environmental Toxicology and Chemistry (36) 1294-1300
The authors quantified hepatic hydrocarbon-inducible cytochrome P4501A (CYP1A) expression, as ethoxyresorufin-O-deethylase (EROD) activity, in wintering harlequin ducks (Histrionicus histrionicus) captured in Prince William Sound, Alaska (USA), during 2011, 2013, and 2014 (22–25 yr following the 1989 Exxon Valdez oil spill). Average EROD activity was compared between birds from areas oiled...
Using variance structure to quantify responses to perturbation in fish catches
Tiffany E. Vidal, Brian J. Irwin, Tyler Wagner, Lars G. Rudstam, James R. Jackson, James R. Bence
2017, Transactions of the American Fisheries Society (146) 584-593
We present a case study evaluation of gill-net catches of Walleye Sander vitreus to assess potential effects of large-scale changes in Oneida Lake, New York, including the disruption of trophic interactions by double-crested cormorants Phalacrocorax auritus and invasive dreissenid mussels. We used the empirical long-term gill-net time series and a...
Spatiotemporal variability of snow depletion curves derived from SNODAS for the conterminous United States, 2004-2013
Jessica M. Driscoll, Lauren E. Hay, Andrew R. Bock
2017, Journal of the American Water Resources Association (53) 655-666
Assessment of water resources at a national scale is critical for understanding their vulnerability to future change in policy and climate. Representation of the spatiotemporal variability in snowmelt processes in continental-scale hydrologic models is critical for assessment of water resource response to continued climate change. Continental-extent hydrologic models such as...
National Park Service Vegetation Mapping Inventory Program: Appalachian National Scenic Trail vegetation mapping project
Kevin D. Hop, Andrew C. Strassman, Mark Hall, Shannon Menard, Ery Largay, Stephanie Sattler, Erin E. Hoy, Janis Ruhser, Enrika Hlavacek, Jennifer Dieck
2017, Natural Resource Report NPS/NETN/NRR—2017/1437
The National Park Service (NPS) Vegetation Mapping Inventory (VMI) Program classifies, describes, and maps existing vegetation of national park units for the NPS Natural Resource Inventory and Monitoring (I&M) Program. The NPS VMI Program is managed by the NPS I&M Division and provides baseline vegetation information to the NPS Natural...
Geomorphology, denudation rates, and stream channel profiles reveal patterns of mountain building adjacent to the San Andreas fault in northern California, USA
Stephen B. DeLong, George E. Hilley, Carol S. Prentice, Christopher J. Crosby, Intan N. Yokelson
2017, GSA Bulletin (129) 732-749
Relative horizontal motion along strike-slip faults can build mountains when motion is oblique to the trend of the strike-slip boundary. The resulting contraction and uplift pose off-fault seismic hazards, which are often difficult to detect because of the poor vertical resolution of satellite geodesy and difficulty of locating offset datable...
Low stress drops observed for aftershocks of the 2011 Mw 5.7 Prague, Oklahoma, earthquake
Danielle F. Sumy, Corrie J. Neighbors, Elizabeth S. Cochran, Katie M. Keranen
2017, Journal of Geophysical Research B: Solid Earth (122) 3813-3834
In November 2011, three Mw ≥ 4.8 earthquakes and thousands of aftershocks occurred along the structurally complex Wilzetta fault system near Prague, Oklahoma. Previous studies suggest that wastewater injection induced a Mw 4.8 foreshock, which subsequently triggered a Mw 5.7 mainshock. We examine source properties of aftershocks with a standard Brune-type spectral model and jointly solve for...
Historical biogeography sets the foundation for contemporary conservation of martens (genus Martes) in northwestern North America
Natalie G. Dawson, Jocelyn P. Colella, Maurine P. Small, Karen D. Stone, Sandra L. Talbot, Joseph A. Cook
2017, Journal of Mammalogy (98) 715-730
Effective conservation of insular populations requires careful consideration of biogeography, including colonization histories and patterns of endemism. Across the Pacific Northwest of North America, Pacific martens (Martes caurina) and American pine martens (Martes americana) are parapatric sister species with distinctive postglacial histories. Using mitochondrial DNA and 12 nuclear microsatellite loci,...
Spatial variation in polycyclic aromatic hydrocarbon exposure in Barrow's goldeneye (Bucephala islandica) in coastal British Columbia
Megan Willie, Daniel Esler, W. Sean Boyd, Philip Molloy, Ronald C. Ydenberg
2017, Marine Pollution Bulletin (118) 167-179
Barrow's goldeneyes are sea ducks that winter throughout coastal British Columbia (BC). Their diet consists primarily of intertidal blue mussels, which can accumulate PAHs; accordingly, goldeneyes may be susceptible to exposure through contaminated prey. In 2014/15, we...
Diagenetic silica enrichment and late-stage groundwater activity in Gale crater, Mars
Jens Frydenvang, Patrick J. Gasda, Joel A. Hurowitz, John P. Grotzinger, Roger C. Wiens, Horton E. Newsom, Ken S. Edgett, Jessica Watkins, John C. Bridges, Sylvestre Maurice, Martin R. Fisk, Jeffrey R. Johnson, William Rapin, Nathan Stein, Sam M. Clegg, S. P. Schwenzer, C. Bedford, P. Edwards, Nicolas Mangold, Agnes Cousin, Ryan B. Anderson, Valerie Payre, David Vaniman, David Blake, Nina L. Lanza, Sanjeev Gupta, Jason K. Van Beek, Violaine Sautter, Pierre-Yves Meslin, Melissa Rice, Ralf Milliken, Ralf Gellert, Lucy Thompson, Ben C. Clark, Dawn Y. Sumner, Abigail A. Fraeman, Kjartan M Kinch, Morten B. Madsen, Igor Mitofranov, Insoo Jun, Fred J. Calef, Ashwin R. Vasavada
2017, Geophysical Research Letters (44) 4716-4724
Diagenetic silica enrichment in fracture-associated halos that crosscut lacustrine and unconformably overlying aeolian sedimentary bedrock is observed on the lower north slope of Aeolis Mons in Gale crater, Mars. The diagenetic silica enrichment is colocated with detrital silica enrichment observed in the lacustrine bedrock yet extends into a considerably younger,...
Cascadia subduction tremor muted by crustal faults
Ray E. Wells, Richard J. Blakely, Aaron G. Wech, Patricia A. McCrory, Andrew Michael
2017, Geology (45) 515-518
Deep, episodic slow slip on the Cascadia subduction megathrust of western North America is accompanied by low-frequency tremor in a zone of high fluid pressure between 30 and 40 km depth. Tremor density (tremor epicenters per square kilometer) varies along strike, and lower tremor density statistically correlates with upper plate...
Matching watershed and otolith chemistry to establish natal origin of an endangered desert lake sucker
Deanna D. Strohm, Phaedra E. Budy, Todd A. Crowl
2017, Transactions of the American Fisheries Society (146) 732-743
Stream habitat restoration and supplemental stocking of hatchery-reared fish have increasingly become key components of recovery plans for imperiled freshwater fish; however, determining when to discontinue stocking efforts, prioritizing restoration areas, and evaluating restoration success present a conservation challenge. In this study, we demonstrate that otolith microchemistry is an effective...
The California Earthquake Advisory Plan: A history
Evelyn A. Roeloffs, James D. Goltz
2017, Seismological Research Letters (88) 784-797
Since 1985, the California Office of Emergency Services (Cal OES) has issued advisory statements to local jurisdictions and the public following seismic activity that scientists on the California Earthquake Prediction Evaluation Council view as indicating elevated probability of a larger earthquake in the same area during the next several days....
Achieving full connectivity of sites in the multiperiod reserve network design problem
Nahid Jafari, Bryan L. Nuse, Clinton T. Moore, Bistra Dilkina, Jeffrey Hepinstall-Cymerman
2017, Computers & Operations Research (81) 119-127
The conservation reserve design problem is a challenge to solve because of the spatial and temporal nature of the problem, uncertainties in the decision process, and the possibility of alternative conservation actions for any given land parcel. Conservation agencies tasked with reserve design may benefit from a dynamic decision system...
Migratory behavior of adult sea lamprey and cumulative passage performance through four fishways
Theodore R. Castro-Santos, Xiaotao Shi, Alexander Haro
2017, Canadian Journal of Fisheries and Aquatic Sciences (5) 790-800
This article describes a study of PIT-tagged sea lamprey (Petromyzon marinus) ascending four fishways comprising three designs at two dams on the Connecticut River, USA. Migration between dams was rapid (median migration rate = 23 km·day−1). Movement through the fishways was much slower, however (median = 0.02–0.33 km·day−1). Overall delay...
Tropical river suspended sediment and solute dynamics in storms during an extreme drought
Kathryn E. Clark, James B. Shanley, Martha A. Scholl, Nicolas Perdrial, Julia N. Perdrial, Alain F. Plante, William H. McDowell
2017, Water Resources Research (53) 3695-3712
Droughts, which can strongly affect both hydrologic and biogeochemical systems, are projected to become more prevalent in the tropics in the future. We assessed the effects of an extreme drought during 2015 on stream water composition in the Luquillo Mountains of Puerto Rico. We demonstrated that drought base flow in...
Distribution and abundance of Millicoma Dace in the Coos River Basin, Oregon
Paul D. Scheerer, James T. Peterson, Shaun Clements
2017, Northwestern Naturalist (98) 39-47
The Millicoma Dace Rhinichthys cataractae is a form of Longnose Dace endemic to the Coos River drainage in southwestern Oregon. Sparse species records in the Oregon State University Ichthyology Collection and database and infrequent recent encounters prompted surveys to assess the current status and distribution of the species. In 2014, we surveyed...
Automatic mapping of the base of aquifer — A case study from Morrill, Nebraska
Mats Lundh Gulbrandsen, Lyndsay B. Ball, Burke J. Minsley, Thomas Mejer Hansen
2017, Interpretation (5) T231-T241
When a geologist sets up a geologic model, various types of disparate information may be available, such as exposures, boreholes, and (or) geophysical data. In recent years, the amount of geophysical data available has been increasing, a trend that is only expected to continue. It is nontrivial (and often, in...
A paleoseismic transect across the northwestern Basin and Range Province, northwestern Nevada and northeastern California, USA
Stephen Personius, Richard W. Briggs, J. Zebulon Maharrey, Stephen J. Angster, Shannon A. Mahan
2017, Geosphere (13) 782-810
We use new and existing data to compile a record of ∼18 latest Quaternary large-magnitude surface-rupturing earthquakes on 7 fault zones in the northwestern Basin and Range Province of northwestern Nevada and northeastern California. The most recent earthquake on all faults postdates the ca. 18–15 ka last glacial highstand of...
Coal-tar-based pavement sealants—a potent source of PAHs
Barbara Mahler, Peter C. Van Metre
2017, Lakeline (37) 13-18
P avement sealants are applied to the asphalt pavement of many parking lots, driveways, and even playgrounds in North America (Figure 1), where, when first applied, they render the pavement glossy black and looking like new. Sealant products used commercially in the central, eastern, and northern United States typically are...
Contributions of wildland fire to terrestrial ecosystem carbon dynamics in North America from 1990 to 2012
Guangsheng Chen, Daniel J. Hayes, A. David McGuire
2017, Global Biogeochemical Cycles (31) 878-900
Burn area and the frequency of extreme fire events have been increasing during recent decades in North America, and this trend is expected to continue over the 21st century. While many aspects of the North American carbon budget have been intensively studied, the net contribution of fire disturbance to the...
Do we need demographic data to forecast plant population dynamics?
Andrew T. Tredennick, Mevin Hooten, Peter B. Adler
2017, Methods in Ecology and Evolution (8) 541-551
Rapid environmental change has generated growing interest in forecasts of future population trajectories. Traditional population models built with detailed demographic observations from one study site can address the impacts of environmental change at particular locations, but are difficult to scale up to the landscape and regional scales...
Creating multithemed ecological regions for macroscale ecology: Testing a flexible, repeatable, and accessible clustering method
Kendra Spence Cheruvelil, Shuai Yuan, Katherine E. Webster, Pang-Ning Tan, Jean-Francois Lapierre, Sarah M. Collins, C. Emi Fergus, Caren E. Scott, Emily Norton Henry, Patricia A. Soranno, Christopher T. Filstrup, Tyler Wagner
2017, Ecology and Evolution (7) 3046-3058
Understanding broad-scale ecological patterns and processes often involves accounting for regional-scale heterogeneity. A common way to do so is to include ecological regions in sampling schemes and empirical models. However, most existing ecological regions were developed for specific purposes, using a limited set of geospatial features and irreproducible methods. Our...
Landscape-scale quantification of fire-induced change in canopy cover following mountain pine beetle outbreak and timber harvest
T. Ryan McCarley, Crystal A. Kolden, Nicole M. Vaillant, Andrew T. Hudak, Alistair Smith, Jason R. Kreitler
2017, Forest Ecology and Management (391) 164-175
Across the western United States, the three primary drivers of tree mortality and carbon balance are bark beetles, timber harvest, and wildfire. While these agents of forest change frequently overlap, uncertainty remains regarding their interactions and influence on specific subsequent fire effects such as change in canopy cover. Acquisition of...
Guidelines for preparation of State water-use estimates for 2015
2017, Open-File Report 2017-1029
The U.S. Geological Survey (USGS) has estimated the use of water in the United States at 5-year intervals since 1950. This report describes the water-use categories and data elements used for the national water-use compilation conducted as part of the USGS National Water-Use Science Project. The report identifies sources of...
Divergence and gene flow in the globally distributed blue-winged ducks
Joel Nelson, Robert E. Wilson, Kevin G. McCracken, Graeme Cumming, Leo Joseph, Patrick-Jean Guay, Jeffrey Peters
2017, Journal of Avian Biology (48) 640-649
The ability to disperse over long distances can result in a high propensity for colonizing new geographic regions, including uninhabited continents, and lead to lineage diversification via allopatric speciation. However, high vagility can also result in gene flow between otherwise allopatric populations, and in some cases, parapatric or divergence-with-gene-flow models...
