Are inland wolf-ungulate systems influenced by marine subsidies of Pacific salmon?
Layne G. Adams, Sean D. Farley, Craig A. Stricker, Dominic J. Demma, Gretchen H. Roffler, Dennis C. Miller, Robert O. Rye
2010, Ecological Applications (20) 251-262
Wolves (Canis lupus) in North America are considered obligate predators of ungulates with other food resources playing little role in wolf population dynamics or wolf–prey relations. However, spawning Pacific salmon (Oncorhyncus spp.) are common throughout wolf range in northwestern North America and may provide a marine subsidy affecting inland wolf–ungulate...
A century of climate and ecosystem change in Western Montana: What do temperature trends portend?
G.T. Pederson, L.J. Graumlich, D.B. Fagre, T. Kipfer, C.C. Muhlfeld
2010, Climatic Change (98) 133-154
The physical science linking human-induced increases in greenhouse gasses to the warming of the global climate system is well established, but the implications of this warming for ecosystem processes and services at regional scales is still poorly understood. Thus, the objectives of this work were to: (1) describe rates of...
On the composition of earth's short-period seismic noise field
K.D. Koper, K. Seats, H. Benz
2010, Bulletin of the Seismological Society of America (100) 606-617
In the classic microseismic band of 5-20 sec, seismic noise consists mainly of fundamental mode Rayleigh and Love waves; however, at shorter periods seismic noise also contains a significant amount of body-wave energy and higher mode surface waves. In this study we perform a global survey of Earth's short-period seismic...
Dione's spectral and geological properties
K. Stephan, R. Jaumann, R. Wagner, R. N. Clark, D. P. Cruikshank, C. A. Hibbitts, T. Roatsch, H. Hoffmann, R. H. Brown, G. Filiacchione, B. J. Buratti, G. B. Hansen, T. B. McCord, P. D. Nicholson, K. H. Baines
2010, Icarus (206) 631-652
We present a detailed analysis of the variations in spectral properties across the surface of Saturn's satellite Dione using Cassini/VIMS data and their relationships to geological and/or morphological characteristics as seen in the Cassini/ISS images. This analysis focuses on a local region on Dione's anti-saturnian hemisphere that was observed by...
Polycyclic aromatic hydrocarbons in soil of the Canadian River floodplain in Oklahoma
F. Sartori, T.L. Wade, J.L. Sericano, B.P. Mohanty, Karen A. Smith
2010, Journal of Environmental Quality (39) 568-579
The accumulation of polycyclic aromatic hydrocarbons (PAH) in soil, plants, and water may impart negative effects on ecosystem and human health. We quantified the concentration and distribution of 41 PAH (n = 32), organic C, total N, and S (n = 140) and investigated PAH sources using a chronosequence of...
Evaluation of a reproductive index for estimating productivity of grassland breeding birds
M.R. Morgan, C. Norment, M.C. Runge
2010, The Auk (127) 86-93
Declining populations of grassland breeding birds have led to increased efforts to assess habitat quality, typically by estimating density or relative abundance. Because some grassland habitats may function as ecological traps, a more appropriate metric for determining quality is breeding success, which is challenging to determine for many cryptic-nesting grassland...
Functional response models to estimate feeding rates of wading birds
J.A. Collazo, J.F. Gilliam, L. Miranda-Castro
2010, Waterbirds (33) 33-40
Forager (predator) abundance may mediate feeding rates in wading birds. Yet, when modeled, feeding rates are typically derived from the purely prey-dependent Holling Type II (HoII) functional response model. Estimates of feeding rates are necessary to evaluate wading bird foraging strategies and their role in food webs; thus, models that...
Migrating tremors illuminate complex deformation beneath the seismogenic San Andreas fault
David R. Shelly
2010, Nature (463) 648-652
The San Andreas fault is one of the most extensively studied faults in the world, yet its physical character and deformation mode beneath the relatively shallow earthquake-generating portion remain largely unconstrained. Tectonic ‘non-volcanic’ tremor, a recently discovered seismic signal probably generated by shear slip on the deep extension of some major...
Improved hydrogeophysical characterization and monitoring through parallel modeling and inversion of time-domain resistivity andinduced-polarization data
Timothy C. Johnson, Roelof J. Versteeg, Andy Ward, Frederick D. Day-Lewis, André Revil
2010, Geophysics (75) WA27-WA41
Electrical geophysical methods have found wide use in the growing discipline of hydrogeophysics for characterizing the electrical properties of the subsurface and for monitoring subsurface processes in terms of the spatiotemporal changes in subsurface conductivity, chargeability, and source currents they govern. Presently, multichannel and multielectrode data collections systems can collect...
Brine delineation and monitoring with electrical resistivity tomography and electromagnetic borehole logging at the Fort Knox well field near West Point, Kentucky
Rory Henderson, Michael D. Unthank, Douglas D. Zettwoch, John W. Lane Jr.
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
The potable water system at Fort Knox is threatened by brine contamination from improperly abandoned natural gas exploration wells. The Fort Knox well field is located near the town of West Point, Kentucky, in the flood plain of the Ohio River. At the site, unconsolidated sediments approximately 30 – 40...
Marine electrical resistivity imaging of submarine groundwater discharge: Sensitivity analysis and application in Waquoit Bay, Massachusetts, USA
Rory Henderson, Frederick D. Day-Lewis, Elena Abarca, Charles F. Harvey, Hanan N. Karam, Lanbo Liu, John W. Lane Jr.
2010, Hydrogeology Journal (18) 173-185
Electrical resistivity imaging has been used in coastal settings to characterize fresh submarine groundwater discharge and the position of the freshwater/salt-water interface because of the relation of bulk electrical conductivity to pore-fluid conductivity, which in turn is a function of salinity. Interpretation of tomograms for hydrologic processes is complicated by...
Minimizing effects of over-water docks on federally listed fish stocks in McNary Reservoir: A literature review for criteria
Dennis W. Rondorf, Gary L. Rutz, Jodi C. Charrier
2010, Report
McNary Lock and Dam were completed in 1953, creating McNary Reservoir, or Lake Wallula. The shoreline of the reservoir is federally owned and as a result the U.S. Army Corps of Engineers (USACE) has certain land and fish habitat management responsibilities to balance with other multipurpose benefits. The Endangered Species...
Multiple well-shutdown tests and site-scale flow simulation in fractured rocks
Claire R. Tiedeman, Pierre J. Lacombe, Daniel J. Goode
2010, Groundwater (48) 401-415
A new method was developed for conducting aquifer tests in fractured-rock flow systems that have a pump-and-treat (P&T) operation for containing and removing groundwater contaminants. The method involves temporary shutdown of individual pumps in wells of the P&T system. Conducting aquifer tests in this manner has several advantages, including (1)...
Invertebrate mercury bioaccumulation in permanent, seasonal, and flooded rice wetlands within California's Central Valley
Joshua T. Ackerman, A. Keith Miles, Collin A. Eagles-Smith
2010, Science of the Total Environment (408) 666-671
We examined methylmercury (MeHg) bioavailability in four of the most predominant wetland habitats in California's Central Valley agricultural region during the spring and summer: white rice, wild rice, permanent wetlands, and shallowly-flooded fallow fields. We sampled MeHg and total mercury (THg) concentrations in two aquatic macroinvertebrate taxa at the inlets,...
Effects of subsidized predators, resource variability, and human population density on desert tortoise populations in the Mojave Desert, USA
Todd C. Esque, Kenneth E. Nussear, K. Kristina Drake, Andrew D. Walde, Kristin H. Berry, Roy C. Averill-Murray, A. Peter Woodman, William I. Boarman, Phil A. Medica, Jeremy S. Mack, Jill S. Heaton
2010, Endangered Species Research (12) 167-177
Understanding predator–prey relationships can be pivotal in the conservation of species. For 2 decades, desert tortoise Gopherus agassizii populations have declined, yet quantitative evidence regarding the causes of declines is scarce. In 2005, Ft. Irwin National Training Center, California, USA, implemented a translocation project including 2 yr of baseline monitoring...
Accuracy of egg flotation throughout incubation to determine embryo age and incubation day in waterbird nests
Joshua T. Ackerman, Collin A. Eagles-Smith
2010, The Condor (112) 438-446
Floating bird eggs to estimate their age is a widely used technique, but few studies have examined its accuracy throughout incubation. We assessed egg flotation for estimating hatch date, day of incubation, and the embryo's developmental age in eggs of the American Avocet (Recurvirostra americana), Black-necked Stilt (Himantopus mexicanus), and...
Stochastic ecological network occupancy (SENO) models: a new tool for modeling ecological networks across spatial scales
Kevin D. Lafferty, Jennifer A. Dunne
2010, Theoretical Ecology (3) 123-135
Stochastic ecological network occupancy (SENO) models predict the probability that species will occur in a sample of an ecological network. In this review, we introduce SENO models as a means to fill a gap in the theoretical toolkit of ecologists. As input, SENO models use a topological interaction network and...
Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States: Average Daily Minimum Temperature, 2002
Michael Wieczorek, Andrew E. LaMotte
2010, Data Series 491-30
This tabular data set represents the average daily minimum temperature in Celsius multiplied by 100 for 2002, compiled for every MRB_E2RF1 catchment of selected Major River Basins (MRBs, Crawford and others, 2006). The source data were the Near-Real-Time High-Resolution Monthly Average Maximum/Minimum Temperature for the Conterminous United States for 2002...
Fishing out marine parasites? Impacts of fishing on rates of parasitism in the ocean
Chelsea L. Wood, Kevin D. Lafferty, Fiorenza Micheli
2010, Ecology Letters (13) 761-775
Among anthropogenic effects on the ocean, fishing is one of the most pervasive and extends deepest into the past. Because fishing reduces the density of fish (reducing transmission efficiency of directly transmitted parasites), selectively removes large fish (which tend to carry more parasites than small fish), and reduces food web...
Historical deposition of mercury and selected trace elements to high-elevation National Parks in the Western U.S. inferred from lake-sediment cores
M. Alisa Mast, David J. Manthorne, David A. Roth
2010, Atmospheric Environment (44) 2577-2586
Atmospheric deposition of Hg and selected trace elements was reconstructed over the past 150 years using sediment cores collected from nine remote, high-elevation lakes in Rocky Mountain National Park in Colorado and Glacier National Park in Montana. Cores were age dated by 210Pb, and sedimentation rates were determined using the...
Juvenile salmonid collection efforts in the Upper Cowlitz River Basin
T.L. Liedtke, T.J. Kock, B.K. Ekstrom, I.M. Royer, D.W. Rondorf
2010, Report
n/a...
Saving our shared birds: Partners in Flight tri-national vision for landbird conservation
Humberto Berlanga, Judith A. Kennedy, Terrell D. Rich, Maria del Coro Arizmendi, Carol J. Beardmore, Peter J. Blancher, Gregory S. Butcher, Andrew R. Couturier, Ashley A. Dayer, Dean W. Demarest, Wendy E. Easton, Mary Gustafson, Eduardo E. Inigo-Elias, Elizabeth A. Krebs, Arvind O. Panjabi, Vicente Rodriguez Contreras, Kenneth V. Rosenberg, Janet M. Ruth, Eduardo Santana Castellon, Rosa Vidal, Tom Will
2010, Report
Landbirds are the most abundant and diverse group of birds in North America, with nearly 900 species distributed across every major terrestrial habitat. Birds are indicators of environmental health; their populations track changes in habitat, water, disease, and climate. They are providers of invaluable ecosystem services, such as pest control,...
Guidelines for calculating and enhancing detection efficiency of PIT tag interrogation systems
Patrick J. Connolly
2010, PNAMP Special Publication 119-125
With increasing use of passive integrated transponder (PIT) tags and reliance on stationary PIT tag interrogation systems to monitor fish populations, guidelines are offered to inform users how best to use limited funding and human resources to create functional systems that maximize a desired level of detection and precision. The...
Modern technologies for an ancient fish: tools to inform management of migratory sturgeon stocks. A report for the Pacific Ocean Shelf Tracking (POST) Project
Troy C. Nelson, Phaedra Doukakis, Steven T Lindley, Andrea Drauch Schreier, Joseph E. Hightower, Larry R. Hildebrand, Rebecca E. Whitlock, Molly A. H. Webb
2010, Report
No abstract available....
Effectiveness of post-fire seeding in desert tortoise Critical Habitat following the 2005 Southern Nevada Fire Complex
Lesley DeFalco, K. Kristina Drake, S. J. Scoles-Sciulla, Kyla L. Bauer
2010, Report
In June 2005, lightning strikes ignited multiple wildfires in southern Nevada. The Southern Nevada Fire Complex burned more than 32,000 acres of designated desert tortoise Critical Habitat and an additional 403,000 acres of Mojave Desert habitat characterized as potentially suitable for the tortoise. Mortalities of desert tortoises were observed after...
