Fine particle retention within stream storage areas at base flow and in response to a storm event
J. D. Drummond, L. G. Larsen, R. González-Pinzón, A. I. Packman, Judson Harvey
2017, Water Resources Research (53) 5690-5705
Fine particles (1–100 µm), including particulate organic carbon (POC) and fine sediment, influence stream ecological functioning because they may contain or have a high affinity to sorb nitrogen and phosphorus. These particles are immobilized within stream storage areas, especially hyporheic sediments and benthic biofilms. However, fine particles are also known...
An “EAR” on environmental surveillance and monitoring: A case study on the use of Exposure–Activity Ratios (EARs) to prioritize sites, chemicals, and bioactivities of concern in Great Lakes waters
Brett R. Blackwell, Gerald T. Ankley, Steven R. Corsi, Laura A. DeCicco, Kieth A. Houck, Richard S. Judson, Shibin Li, Matthew T. Martin, Elizabeth Murphy, Anthony L. Schroeder, Edwin R. Smith, Joe Swintek, Daniel L. Villeneuve
2017, Environmental Science & Technology (51) 8713-8724
Current environmental monitoring approaches focus primarily on chemical occurrence. However, based on concentration alone, it can be difficult to identify which compounds may be of toxicological concern and should be prioritized for further monitoring, in-depth testing, or management. This can be problematic because toxicological characterization is lacking for many emerging...
Nitrogenase activity by biological soil crusts in cold sagebrush steppe ecosystems
Stacy G. Schwabedissen, Kathleen A. Lohse, Sasha C. Reed, Ken A. Aho, Timothy S. Magnuson
2017, Biogeochemistry (134) 57-76
In drylands worldwide, biological soil crusts (BSC) form a thin photosynthetic cover across landscapes, and provide vital benefits in terms of stabilizing soil and fixing nitrogen (N) and carbon (C). Numerous studies have examined the effects of climate and disturbance on BSC functions; however, few have characterized these responses in...
Population dynamics of brown trout (Salmo trutta) in Spruce Creek Pennsylvania: A quarter-century perspective
Gary D. Grossman, Robert F. Carline, Tyler Wagner
2017, Freshwater Biology (62) 1143-1154
We examined the relationship between density-independent and density-dependent factors on the demography of a dense, relatively unexploited population of brown trout in Spruce Creek Pennsylvania between 1985 and 2011.Individual PCAs of flow and temperature data elucidated groups of years with multiple high flow versus multiple low flow...
Short-term ecological consequences of collaborative restoration treatments in ponderosa pine forests of Colorado
Jenny S. Briggs, Paula J. Fornwalt, Jonas A. Feinstein
2017, Forest Ecology and Management (395) 69-80
Ecological restoration treatments are being implemented at an increasing rate in ponderosa pine and other dry conifer forests across the western United States, via the USDA Forest Service’s Collaborative Forest Landscape Restoration (CFLR) program. In this program, collaborative stakeholder groups work with National Forests (NFs) to adaptively implement and monitor...
Estimating the number of recreational anglers for a given waterbody
Kevin L. Pope, Larkin A. Powell, Brian S. Harmon, Mark A. Pegg, Christopher J. Chizinski
2017, Fisheries Research (191) 69-75
Knowing how many anglers use a given body of water is paramount for understanding components of a fishery related to angling pressure and harvest, yet no study has attempted to provide an estimate of the population size of anglers for a given waterbody. Here, we use information from creel surveys...
Downscaling wind and wavefields for 21st century coastal flood hazard projections in a region of complex terrain
Andrea C. O'Neill, Li H. Erikson, Patrick L. Barnard
2017, Earth and Space Science (4) 314-334
While global climate models (GCMs) provide useful projections of near-surface wind vectors into the 21st century, resolution is not sufficient enough for use in regional wave modeling. Statistically downscaled GCM projections from Multivariate Adaptive Constructed Analogues provide daily averaged near-surface winds at an appropriate spatial resolution for wave modeling within...
Habitat associations of juvenile Burbot in a tributary of the Kootenai River
Zachary S. Beard, Michael C. Quist, Ryan S. Hardy, Tyler J. Ross
2017, Transactions of the American Fisheries Society (146) 1008-1015
Burbot Lota lota in the lower Kootenai River, Idaho, have been the focus of extensive conservation efforts, particularly conservation aquaculture. One of the primary management strategies has been the release of Burbot into small tributaries in the Kootenai River basin, such as Deep Creek. Since 2012, approximately 12,000 juvenile Burbot have been...
Inputs and internal cycling of nitrogen to a causeway influenced, hypersaline lake, Great Salt Lake, Utah, USA
David L. Naftz
2017, Aquatic Geochemistry (23) 199-216
Nitrogen inputs to Great Salt Lake (GSL), located in the western USA, were quantified relative to the resident nitrogen mass in order to better determine numeric nutrient criteria that may be considered at some point in the future. Total dissolved nitrogen inputs from four surface-water sources entering GSL were modeled...
Geomagnetically induced currents: Science, engineering, and applications readiness
Antti Pulkkinen, E. Bernabeu, A. Thomson, A. Viljanen, R. Pirjola, D. Boteler, J. Eichner, P.J. Cilliers, D. Welling, N.P. Savani, R.S. Weigel, Jeffrey J. Love, Christopher Balch, C.M. Ngwira, G. Crowley, Adam Schultz, R. Kataoka, B. Anderson, D. Fugate, J.J. Simpson, M. MacAlester
2017, Space Weather (15) 828-856
This paper is the primary deliverable of the very first NASA Living With a Star Institute Working Group, Geomagnetically Induced Currents (GIC) Working Group. The paper provides a broad overview of the current status and future challenges pertaining to the science, engineering, and applications of the GIC problem. Science is...
Spatiotemporal analysis of changes in lode mining claims around the McDermitt Caldera, northern Nevada and southern Oregon
Joshua A. Coyan, Michael L. Zientek, Mark J. Mihalasky
2017, Natural Resources Research (26) 319-337
Resource managers and agencies involved with planning for future federal land needs are required to complete an assessment of and forecast for future land use every ten years. Predicting mining activities on federal lands is difficult as current regulations do not require disclosure of exploration results. In these cases, historic...
Real-time geomagnetic monitoring for space weather-related applications: Opportunities and challenges
Jeffrey J. Love, Carol Finn
2017, Space Weather (15) 820-827
An examination is made of opportunities and challenges for enhancing global, real-time geomagnetic monitoring that would be beneficial for a variety of operational projects. This enhancement in geomagnetic monitoring can be attained by expanding the geographic distribution of magnetometer stations, improving the quality of magnetometer data, increasing acquisition sampling rates,...
Evaluating population expansion of black bears using spatial capture-recapture
Catherine C. Sun, Angela K. Fuller, Matthew P. Hare, Jeremy E. Hurst
2017, Journal of Wildlife Management (81) 814-823
The population of American black bears (Ursus americanus) in southern New York, USA has been growing and expanding in range since the 1990s. This has motivated a need to anticipate future patterns of range expansion. We conducted a non-invasive, genetic, spatial capture-recapture (SCR) study to estimate black bear density and...
Numerical simulations of sand production in interbedded hydrate-bearing sediments during depressurization
Shun Uchida, Jeen-Shang Lin, Evgeniy Myshakin, Yongkoo Seol, Timothy S. Collett, Ray Boswell
2017, Conference Paper, Proceeding of the 9th International Conference on Gas Hydrates
Geomechanical behavior of hydrate-bearing sediments during gas production is complex, involving changes in hydrate-dependent mechanical properties. When interbedded clay layers are present, the complexity is more pronounced because hydrate dissociation tends to occur preferentially in the sediments adjacent to the clay layers due to clay layers acting as a heat...
Geomorphology of comet 67P/Churyumov–Gerasimenko
Samuel P. D. Birch, Y. Tang, A. G. Hayes, Randolph L. Kirk, D. Bodewitz, H. Campins, Y. Fernandez, R. de Freitas Bart, N. W. Kutsop, H. Sierks, J. M. Soderblom, S. W. Squyres, J.-B. Vincent
2017, Monthly Notices of the Royal Astronomical Society (469) S50-S67
We present a global geomorphological map of comet 67P/Churyumov–Gerasimenko (67P/C-G) using data acquired by the Rosetta Orbiter’s OSIRIS Narrow Angle Camera. The images used in our study were acquired between 2014 August and 2015 May, before 67P/C-G passed through perihelion. Imagery of the Southern hemisphere was included in our study, allowing us...
Physical response of a back-barrier estuary to a post-tropical cyclone
Alexis Beudin, Neil Kamal Ganju, Zafer Defne, Alfredo Aretxabaleta
2017, Journal of Geophysical Research C: Oceans (122) 5888-5904
This paper presents a modeling investigation of the hydrodynamic and sediment transport response of Chincoteague Bay (VA/MD, USA) to Hurricane Sandy using the Coupled Ocean-Atmosphere-Wave-Sediment-Transport (COAWST) modeling system. Several simulation scenarios with different combinations of remote and local forces were conducted to identify the dominant physical processes. While 80% of...
Puffins reveal contrasting relationships between forage fish and ocean climate in the North Pacific
William J. Sydeman, John F. Piatt, Sarah Ann Thompson, Marisol Garcia-Reyes, Scott A. Hatch, Mayumi L. Arimitsu, Leslie Slater, Jeffrey C. Williams, Nora A. Rojek, Stephani G. Zador, Heather M. Renner
2017, Fisheries Oceanography (26) 379-395
Long-term studies of predator food habits (i.e., ‘predator-based sampling’) are useful for identifying patterns of spatial and temporal variability of forage nekton in marine ecosystems. We investigated temporal changes in forage fish availability and relationships to ocean climate by analyzing diet composition of three puffin species (horned puffin Fratercula corniculata, tufted...
Autonomous acoustic recorders reveal complex patterns in avian detection probability
Sarah J. Thompson, Colleen M. Handel, Lance B. McNew
2017, Journal of Wildlife Management (81) 1228-1241
Avian point‐count surveys are typically designed to occur during periods when birds are consistently active and singing, but seasonal and diurnal patterns of detection probability are often not well understood and may vary regionally or between years. We deployed autonomous acoustic recorders to assess how avian availability for detection (i.e.,...
Genetic assessment of the effects of streamscape succession on coho salmon Oncorhynchus kisutch colonization in recently deglaciated streams
Kim T. Scribner, Chad Soiseth, Jeffrey J. McGuire, G. Kevin Sage, Lyman K. Thorsteinson, J. L. Nielsen, E. Knudsen
2017, Journal of Fish Biology (91) 195-218
Measures of genetic diversity within and among populations and historical geomorphological data on stream landscapes were used in model simulations based on approximate Bayesian computation (ABC) to examine hypotheses of the relative importance of stream features (geomorphology and age) associated with colonization events and gene flow for coho salmon Oncorhynchus kisutch breeding...
Monitoring water content dynamics of biological soil crusts
Michael H. Young, Lynn F. Fenstermaker, Jayne Belnap
2017, Journal of Arid Environments (142) 41-49
Biological soil crusts (hereafter, “biocrusts”) dominate soil surfaces in nearly all dryland environments. To better understand the influence of water content on carbon (C) exchange, we assessed the ability of dual-probe heat-pulse (DPHP) sensors, installed vertically and angled, to measure changes in near-surface water content. Four DPHP sensors were installed...
Comparison of American Fisheries Society (AFS) standard fish sampling techniques and environmental DNA for characterizing fish communities in a large reservoir
Christina R. Perez, Scott A. Bonar, Jon J. Amberg, Bridget Ladell, Christopher B. Rees, William T. Stewart, Curtis J. Gill, Chris Cantrell, Anthony Robinson
2017, North American Journal of Fisheries Management (37) 1010-1027
Recently, methods involving examination of environmental DNA (eDNA) have shown promise for characterizing fish species presence and distribution in waterbodies. We evaluated the use of eDNA for standard fish monitoring surveys in a large reservoir. Specifically, we compared the presence, relative abundance, biomass, and relative percent composition of Largemouth Bass Micropterus...
Novel, continuous monitoring of fine‐scale movement using fixed‐position radiotelemetry arrays and random forest location fingerprinting
Andrew B. Harbicht, Theodore R. Castro-Santos, William R. Ardren, Dimitry Gorsky, Dylan Fraser
2017, Methods in Ecology and Evolution (8) 850-859
Radio‐tag signals from fixed‐position antennas are most often used to indicate presence or absence of individuals, or to estimate individual activity levels from signal strength variation within an antenna's detection zone. The potential of such systems to provide more precise information on tag location and movement has not been...
Landform features and seasonal precipitation predict shallow groundwater influence on temperature in headwater streams
Zachary C. Johnson, Craig D. Snyder, Nathaniel P. Hitt
2017, Water Resources Research (53) 5788-5812
Headwater stream responses to climate change will depend in part on groundwater‐surface water exchanges. We used linear modeling techniques to partition likely effects of shallow groundwater seepage and air temperature on stream temperatures for 79 sites in nine focal watersheds using hourly air and water temperature measurements collected during summer...
Species distribution models for a migratory bird based on citizen science and satellite tracking data
Christopher L. Coxen, Jennifer K. Frey, Scott A. Carleton, Daniel P. Collins
2017, Global Ecology and Conservation (11) 298-311
Species distribution models can provide critical baseline distribution information for the conservation of poorly understood species. Here, we compared the performance of band-tailed pigeon (Patagioenas fasciata) species distribution models created using Maxent and derived from two separate presence-only occurrence data sources in New Mexico: 1) satellite tracked birds and 2) observations...
Morphological and molecular characterization of Sarcocystis arctica-like sarcocysts from the Arctic fox (Vulpes lagopus) from Alaska, USA
Camila K. Cerqueira-Cezar, Peter C. Thompson, Shiv K. Verma, Joseph Mowery, Rafael Calero-Bernal, Fernando H. Antunes Murata, David R. Sinnett, Caroline R. Van Hemert, Benjamin M. Rosenthal, Jitender P. Dubey
2017, Parasitology Research (116) 1871-1878
The muscles of herbivores commonly harbor sarcocysts of parasites belonging to species in the genus Sarcocystis, but such muscle parasites are rare in carnivores. Here, we report Sarcocystis arctica-like sarcocysts in muscles of Arctic foxes (Vulpes lagopus) from Alaska, USA, for the first time. The tongues of...
