Assessment of the usefulness of semipermeable membrane devices for long-term watershed monitoring in an urban slough system
K. McCarthy
2006, Environmental Monitoring and Assessment (118) 293-318
Semipermeable membrane devices (SPMDs) were deployed at eight sites within the Buffalo Slough, near Portland, Oregon, to (1) measure the spatial and seasonal distribution of dissolved polycyclic aromatic hydrocarbon (PAH) and organochlorine (OC) compounds in the slough, (2) assess the usefulness of SPMDs as a tool for investigating and monitoring...
Solute sources in stream water during consecutive fall storms in a northern hardwood forest watershed: A combined hydrological, chemical and isotopic approach
M.J. Mitchell, K.B. Piatek, S. Christopher, B. Mayer, C. Kendall, P. McHale
2006, Biogeochemistry (78) 217-246
Understanding the effects of climate change including precipitation patterns has important implications for evaluating the biogeochemical responses of watersheds. We focused on four storms in late summer and early fall that occurred after an exceptionally dry period in 2002. We analyzed not only the influence of these storms on...
Determination of coalbed methane potential and gas adsorption capacity in Western Kentucky coals
S.M. Mardon, K.G. Takacs, J.C. Hower, C.F. Eble, Maria Mastalerz
2006, Conference Paper, 23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development
The Illinois Basin has not been developed for Coalbed Methane (CBM) production. It is imperative to determine both gas content and other parameters for the Kentucky portion of the Illinois Basin if exploration is to progress and production is to occur in this area. This research is part of a...
Assessing the nutritional stress hypothesis: Relative influence of diet quantity and quality on seabird productivity
Patrick G.R. Jodice, Daniel D. Roby, K.R. Turco, Robert M. Suryan, David B. Irons, John F. Piatt, Michael T. Shultz, David G. Roseneau, Arthur B. Kettle, Jill A. Anthony
2006, Marine Ecology Progress Series (325) 267-279
Food availability comprises a complex interaction of factors that integrates abundance, taxonomic composition, accessibility, and quality of the prey base. The relationship between food availability and reproductive performance can be assessed via the nutritional stress (NSH) and junk-food (JFH) hypotheses. With respect to reproductive success, NSH posits that a deficiency...
Deep magma transport at Kilauea volcano, Hawaii
T. L. Wright, F. W. Klein
2006, LITHOS (87) 50-79
The shallow part of Kilauea's magma system is conceptually well-understood. Long-period and short-period (brittle-failure) earthquake swarms outline a near-vertical magma transport path beneath Kilauea's summit to 20 km depth. A gravity high centered above the magma transport path demonstrates that Kilauea's shallow magma system, established early in the volcano's history,...
Effects of long-term water table drawdown on evapotranspiration and vegetation in an arid region phreatophyte community
D.J. Cooper, J.S. Sanderson, D.I. Stannard, D.P. Groeneveld
2006, Journal of Hydrology (325) 21-34
Evapotranspiration rates and the ground water component of evapotranspiration at a site in Colorado's San Luis Valley that is dominated by shrubby phreatophytes (greasewood and rabbitbrush) were compared before and after a water table drawdown. Evapotranspiration (ET) rates at the site were first measured in 1985-1987 (pre-drawdown) when the mean...
Characterization of microsatellite loci isolated in trumpeter swan (Cygnus buccinator)
J. St John, F.A. Ransler, T.W. Quinn, S.J. Oyler-McCance
2006, Molecular Ecology Notes (6) 1083-1085
Primers for 16 microsatellite loci were developed for the trumpeter swan (Cygnus buccinator), a species recovering from a recent population bottleneck. In a screen of 158 individuals, the 16 loci were found to have levels of variability ranging from two to seven alleles. No loci were found to be linked,...
Prediction and discovery of new geothermal resources in the Great Basin: Multiple evidence of a large undiscovered resource base
M.F. Coolbaugh, G. L. Raines, R. E. Zehner, L. Shevenell, C.F. Williams
2006, Conference Paper, Transactions - Geothermal Resources Council
Geothermal potential maps by themselves cannot directly be used to estimate undiscovered resources. To address the undiscovered resource base in the Great Basin, a new and relatively quantitative methodology is presented. The methodology involves three steps, the first being the construction of a data-driven probabilistic model of the location of...
Atmospheric deposition of current-use and historic-use pesticides in snow at National Parks in the Western United States
K.J. Hageman, S.L. Simonich, K. Campbell, G.R. Wilson, D.H. Landers
2006, Environmental Science & Technology (40) 3174-3180
The United States (U.S.) National Park Service has initiated research on the atmospheric deposition and fate of semi-volatile organic compounds in its alpine, sub-Arctic, and Arctic ecosystems in the Western U.S. Results for the analysis of pesticides in seasonal snowpack samples collected in spring 2003 from seven national parks are...
Decay of aftershock density with distance indicates triggering by dynamic stress
K.R. Felzer, E. E. Brodsky
2006, Nature (441) 735-738
The majority of earthquakes are aftershocks, yet aftershock physics is not well understood. Many studies suggest that static stress changes trigger aftershocks, but recent work suggests that shaking (dynamic stresses) may also play a role. Here we measure the decay of aftershocks as a function of distance from magnitude 2-6...
Lesser scaup winter foraging and nutrient reserve acquisition in east-central Florida
G. Herring, J.A. Collazo
2006, Journal of Wildlife Management (70) 1682-1689
Lesser scaup (Aythya affinis) populations have been declining since the late 1970s. One of the explanations to account for this decline, the spring-condition hypothesis (SCH), is based on the premise that scaup are limited by their ability to acquire or maintain nutrient reserves during migration to the breeding grounds, leading...
Grassland songbirds in a dynamic management landscape: Behavioral responses and management strategies
N.G. Perlut, A.M. Strong, T.M. Donovan, N. J. Buckley
2006, Ecological Applications (16) 2235-2247
In recent decades, earlier and more frequent harvests of agricultural grasslands have been implicated as a major cause of population declines in grassland songbirds. From 2002 to 2005, in the Champlain Valley of Vermont and New York, USA, we studied the reproductive success of Savannah Sparrows (Passerculus sandwichensis) and Bobolinks...
Mapping of Titan: Results from the first Titan radar passes
E. R. Stofan, J. I. Lunine, R. Lopes, F. Paganelli, R. D. Lorenz, C. A. Wood, Randolph L. Kirk, S. Wall, C. Elachi, Laurence A. Soderblom, S. Ostro, M. Janssen, J. Radebaugh, L. Wye, H. Zebker, Y. Anderson, M. Allison, R. Boehmer, P. Callahan, P. Encrenaz, E. Flamini, G. Francescetti, Y. Gim, G. Hamilton, S. Hensley, W.T.K. Johnson, K. Kelleher, D. Muhleman, G. Picardi, F. Posa, L. Roth, R. Seu, S. Shaffer, B. Stiles, S. Vetrella, R. West
2006, Icarus (185) 443-456
The first two swaths collected by Cassini's Titan Radar Mapper were obtained in October of 2004 (Ta) and February of 2005 (T3). The Ta swath provides evidence for cryovolcanic processes, the possible occurrence of fluvial channels and lakes, and some tectonic activity. The T3 swath has extensive areas of dunes...
Confirmation of a meteoritic component in impact-melt rocks of the Chesapeake Bay impact structure, Virginia, USA - Evidence from osmium isotopic and PGE systematics
S.R. Lee, J. Wright Horton Jr., R.J. Walker
2006, Meteoritics and Planetary Science (41) 819-833
The osmium isotope ratios and platinum-group element (PGE) concentrations of impact-melt rocks in the Chesapeake Bay impact structure were determined. The impact-melt rocks come from the cored part of a lower-crater section of suevitic crystalline-clast breccia in an 823 m scientific test hole over the central uplift at Cape Charles,...
The heartbeat of the volcano: The discovery of episodic activity at Prometheus on Io
Ashley G. Davies, Lionel Wilson, Dennis Matson, Giovanni Leone, Laszlo P. Keszthelyi, Windy L. Jaeger
2006, Icarus (184) 460-477
The temporal signature of thermal emission from a volcano is a valuable clue to the processes taking place both at and beneath the surface. The Galileo Near Infrared Mapping Spectrometer (NIMS) observed the volcano Prometheus, on the jovian moon Io, on multiple occasions between 1996 and 2002. The 5 micron (μm) brightness of this volcano shows...
Sizing up oil on Alaska's North Slope
K. J. Bird, D.W. Houseknecht
2006, Geotimes (51) 24-27
[No abstract available]...
Estimation of temporary emigration in male toads
E. Muths, R. D. Scherer, P.S. Corn, B.A. Lambert
2006, Ecology (87) 1048-1056
Male boreal toads (Bufo boreas) are thought to return to the breeding site every year but, if absent in a particular year, will be more likely to return the following year. Using Pollock's robust design we estimated temporary emigration (the probability a male toad is absent from a breeding site...
Coal geochemistry in the service of archaeology
C.A. Palmer, R. B. Finkelman
2006, International Journal of Coal Geology (66) 151-152
[No abstract available]...
A Bayesian random effects discrete-choice model for resource selection: Population-level selection inference
D.L. Thomas, D. Johnson, B. Griffith
2006, Journal of Wildlife Management (70) 404-412
Modeling the probability of use of land units characterized by discrete and continuous measures, we present a Bayesian random-effects model to assess resource selection. This model provides simultaneous estimation of both individual- and population-level selection. Deviance information criterion (DIC), a Bayesian alternative to AIC that is sample-size specific, is used...
Extracting the building response using seismic interferometry: Theory and application to the Millikan Library in Pasadena, California
R. Snieder, E. Safak
2006, Bulletin of the Seismological Society of America (96) 586-598
The motion of a building depends on the excitation, the coupling of the building to the ground, and the mechanical properties of the building. We separate the building response from the excitation and the ground coupling by deconvolving the motion recorded at different levels in the building and apply this...
Seismic attenuation structure of the Seattle Basin, Washington State from explosive-source refraction data
Q. Li, W.S.D. Wilcock, T. L. Pratt, C.M. Snelson, T.M. Brocher
2006, Bulletin of the Seismological Society of America (96) 553-571
We used waveform data from the 1999 SHIPS (Seismic Hazard Investigation of Puget Sound) seismic refraction experiment to constrain the attenuation structure of the Seattle basin, Washington State. We inverted the spectral amplitudes of compressional- and shear-wave arrivals for source spectra, site responses, and one- and two-dimensional Q-1 models at...
Helping Students make the transition from novice learner of ground-water concepts to expert using the Plume Busters software
P. A. Macfarlane, G. Bohling, K.W. Thompson, M. Townsend
2006, Journal of Geoscience Education (54) 610-619
Environmental and earth science students are novice learners and lack the experience needed to rise to the level of expert. To address this problem we have developed the prototype Plume Busters?? software as a capstone educational experience, in which students take on the role of an environmental consultant. Following a...
Possible effects of the 2004 and 2005 hurricanes on manatee survival rates and movement
C.A. Langtimm, M. D. Krohn, J.P. Reid, B.M. Stith, C.A. Beck
2006, Estuaries and Coasts (29) 1026-1032
Prior research on manatee (Trichechus manatus latirostris) survival in northwest Florida, based on mark-resighting photo-identification data from 1982-1998, showed that annual adult apparent survival rate was significantly lower during years with extreme storms. Mechanisms that we proposed could have led to lower estimates included stranding, injury from debris, being fatally...
Alpersite (Mg,Cu)SO4·7H2O, a new mineral of the melanterite group, and cuprian pentahydrite: Their occurrence within mine waste
Ronald C. Peterson, Jane M. Hammarstrom, Robert R. Seal II
2006, American Mineralogist (91) 261-269
Alpersite, Mg0.58Cu0.37Zn0.02Mn0.02Fe0.01SO4·7H2O, a new mineral species with direct relevance to reactions in mine waste, occurs in a mineralogically zoned assemblage in sheltered areas at the abandoned Big Mike mine in central Nevada at a relative humidity of 65% and T = 4 °C. Blue alpersite, which is isostructural with melanterite (FeSO4·7H2O),...
Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment
Lorraine E. Flint, David C. Buesch, Alan L. Flint
2006, Vadose Zone Journal (5) 480-492
Characterization of the physical and unsaturated hydrologic properties of subsurface materials is necessary to calculate flow and transport for land use practices and to evaluate subsurface processes such as perched water or lateral diversion of water, which are influenced by features such as faults, fractures, and abrupt changes in lithology....
