Santa Barbara Basin diatom and silicoflagellate response to global climate anomalies during the past 2200 years
J.A. Barron, D. Bukry, D. Field
2010, Quaternary International (215) 34-44
Santa Barbara Basin (SBB) diatom and silicoflagellate assemblages are quantified from a box core record spanning AD 1940-2001 and an Ocean Drilling Program Hole 893A record from ???220 BC to AD 1880. The combined relative abundance of the diatoms Fragilariopsis doliolus and Nitzschia interrupteseriata from continuous two-year sampling intervals in...
Reserve growth in oil pools of Alberta: Model and forecast
M. Verma, T. Cook
2010, Bulletin of Canadian Petroleum Geology (58) 283-293
Reserve growth is recognized as a major component of additions to reserves in most oil provinces around the world, particularly in mature provinces. It takes place as a result of the discovery of new pools/reservoirs and extensions of known pools within existing fields, improved knowledge of reservoirs over time leading...
Influences of acid mine drainage and thermal enrichment on stream fish reproduction and larval survival
Andrew W. Hafs, C.D. Horn, P. M. Mazik, K.J. Hartman
2010, Northeastern Naturalist (17) 575-592
Potential effects of acid mine drainage (AMD) and thermal enrichment on the reproduction of fishes were investigated through a larval-trapping survey in the Stony River watershed, Grant County, WV. Trapping was conducted at seven sites from 26 March to 2 July 2004. Overall larval catch was low (379 individuals in...
Assessment of undiscovered conventional oil and gas resources, onshore Claiborne Group, United Statespart of the northern Gulf of Mexico Basin
P.C. Hackley, T.E. Ewing
2010, American Association of Petroleum Geologists Bulletin (94) 1607-1636
The middle Eocene Claiborne Group was assessed for undiscovered conventional hydrocarbon resources using established U.S. Geological Survey assessment methodology. This work was conducted as part of a 2007 assessment of Paleogene-Neogene strata of the northern Gulf of Mexico Basin, including the United States onshore and state waters (Dubiel et al.,...
On the nature of the dirty ice at the bottom of the GISP2 ice core
Michael L. Bender, Edward Burgess, Richard B. Alley, Bruce Barnett, Gary D. Clow
2010, Earth and Planetary Science Letters (299) 466-473
We present data on the triple Ar isotope composition in trapped gas from clean, stratigraphically disturbed ice between 2800 and 3040m depth in the GISP2 ice core, and from basal dirty ice from 3040 to 3053m depth. We also present data for the abundance and isotopic composition of O2 and...
Transmission and reassortment of avian influenza viruses at the Asian-North American interface
Andrew M. Ramey, John M. Pearce, Craig R. Ely, Lisa M. Sheffield Guy, David B. Irons, Dirk V. Derksen, S. Ip
2010, Virology (406) 352-359
Twenty avian influenza viruses were isolated from seven wild migratory bird species sampled at St. Lawrence Island, Alaska. We tested predictions based on previous phylogenetic analyses of avian influenza viruses that support spatially dependent trans-hemispheric gene flow and frequent interspecies transmission at a location situated at the Asian–North American interface....
Holocene landscape response to seasonality of storms in the Mojave Desert
D. M. Miller, K. M. Schmidt, S. A. Mahan, J. P. McGeehin, L.A. Owen, J.A. Barron, F. Lehmkuhl, R. Lohrer
2010, Quaternary International (215) 45-61
New optically stimulated and radiocarbon ages for alluvial fan and lake deposits in the Mojave Desert are presented, which greatly improves the temporal resolution of surface processes. The new Mojave Desert climate-landscape record is particularly detailed for the late Holocene. Evidence from...
In situ sulfur isotope analysis of sulfide minerals by SIMS: Precision and accuracy, with application to thermometry of ~3.5Ga Pilbara cherts
R. Kozdon, N.T. Kita, J.M. Huberty, J.H. Fournelle, C. A. Johnson, J.W. Valley
2010, Chemical Geology (275) 243-253
Secondary ion mass spectrometry (SIMS) measurement of sulfur isotope ratios is a potentially powerful technique for in situ studies in many areas of Earth and planetary science. Tests were performed to evaluate the accuracy and precision of sulfur isotope analysis by SIMS in a set of seven well-characterized, isotopically homogeneous...
The relative influence of nutrients and habitat on stream metabolism in agricultural streams
J.D. Frankforter, H.S. Weyers, J. D. Bales, P.W. Moran, D.L. Calhoun
2010, Environmental Monitoring and Assessment (168) 461-479
Stream metabolism was measured in 33 streams across a gradient of nutrient concentrations in four agricultural areas of the USA to determine the relative influence of nutrient concentrations and habitat on primary production (GPP) and respiration (CR-24). In conjunction with the stream metabolism estimates, water quality and algal biomass samples...
Using noble gases measured in spring discharge to trace hydrothermal processes in the Norris Geyser Basin, Yellowstone National Park, U.S.A.
W.P. Gardner, D. D. Susong, D. K. Solomon, H.P. Heasler
2010, Journal of Volcanology and Geothermal Research (198) 394-404
Dissolved noble gas concentrations in springs are used to investigate boiling of hydrothermal water and mixing of hydrothermal and shallow cool water in the Norris Geyser Basin area. Noble gas concentrations in water are modeled for single stage and continuous steam removal. Limitations on boiling using noble gas concentrations are...
Feather lead concentrations and 207Pb/206Pb ratios reveal lead exposure history of California Condors (Gymnogyps californianus)
M.E. Finkelstein, D. George, S. Scherbinski, R. Gwiazda, M. Johnson, J. Burnett, J. Brandt, S. Lawrey, Allan P. Pessier, M.R. Clark, Janna Wynne, J. Grantham, D. R. Smith
2010, Environmental Science & Technology (44) 2639-2647
Lead poisoning is a primary factor impeding the survival and recovery of the critically endangered California Condor (Gymnogyps californianus). However, the frequency and magnitude of lead exposure in condors is not well-known in part because most blood lead monitoring occurs biannually, and biannual blood samples capture only ∼10% of a...
A general science-based framework for dynamical spatio-temporal models
C. K. Wikle, M.B. Hooten
2010, Test (19) 417-451
Spatio-temporal statistical models are increasingly being used across a wide variety of scientific disciplines to describe and predict spatially-explicit processes that evolve over time. Correspondingly, in recent years there has been a significant amount of research on new statistical methodology for such models. Although descriptive models that approach the problem...
The New Albany shale in Illinois: Emerging play or prolific source
Joan Crockett, David E. Morse
2010, Oil & Gas Journal (108) 72-79
The New Albany shale (Upper Devonian) in the Illinois basin is the primary hydrocarbon source rock for the basins nearly 4 billion bbl of oil production to date. The gas play is well-established in Indiana and Western Kentucky. One in-situ oil producing well was reported in a multiply competed well...
Linking MODFLOW with an agent-based land-use model to support decision making
H. W. Reeves, M.L. Zellner
2010, Ground Water (48) 649-660
The U.S. Geological Survey numerical groundwater flow model, MODFLOW, was integrated with an agent-based land-use model to yield a simulator for environmental planning studies. Ultimately, this integrated simulator will be used as a means to organize information, illustrate potential system responses, and facilitate communication within a participatory modeling framework. Initial...
Complex adaptive systems and game theory: An unlikely union
M. Hadzikadic, T. Carmichael, C. Curtin
2010, Complexity (16) 34-42
A Complex Adaptive System is a collection of autonomous, heterogeneous agents, whose behavior is defined with a limited number of rules. A Game Theory is a mathematical construct that assumes a small number of rational players who have a limited number of actions or strategies available to them. The CAS...
The Paleogene California River: Evidence of Mojave-Uinta paleodrainage from U-Pb ages of detrital zircons
S.J. Davis, W.R. Dickinson, G. E. Gehrels, J.E. Spencer, T.F. Lawton, A.R. Carroll
2010, Geology (38) 931-934
U-Pb age spectra of detrital zircons in samples from the Paleogene Colton Formation in the Uinta Basin of northeastern Utah and the Late Cretaceous McCoy Mountains Formation of southwestern Arizona (United States) are statistically indistinguishable. This finding refutes previous inferences that arkosic detritus of the Colton was derived from cratonic...
A physiological approach to quantifying thermal habitat quality for redband rainbow trout (Oncorhynchus mykiss gairdneri) in the south Fork John Day River, Oregon
J.W. Feldhaus, S.A. Heppell, H. Li, M.G. Mesa
2010, Environmental Biology of Fishes (87) 277-290
We examined tissue-specific levels of heat shock protein 70 (hsp70) and whole body lipid levels in juvenile redband trout (Oncorhynchus mykiss gairdneri) from the South Fork of the John Day River (SFJD), Oregon, with the goal of determining if these measures could be used as physiological indicators of thermal habitat...
Floral and nesting resources, habitat structure, and fire influence bee distribution across an open-forest gradient
R. Grundel, R.P. Jean, K.J. Frohnapple, G.A. Glowacki, P.E. Scott, N.B. Pavlovic
2010, Ecological Applications (20) 1678-1692
Given bees' central effect on vegetation communities, it is important to understand how and why bee distributions vary across ecological gradients. We examined how plant community composition, plant diversity, nesting suitability, canopy cover, land use, and fire history affected bee distribution across an open-forest gradient in northwest Indiana, USA, a...
Quantifying data worth toward reducing predictive uncertainty
A.M. Dausman, J. Doherty, C.D. Langevin, M.C. Sukop
2010, Ground Water (48) 729-740
The present study demonstrates a methodology for optimization of environmental data acquisition. Based on the premise that the worth of data increases in proportion to its ability to reduce the uncertainty of key model predictions, the methodology can be used to compare the worth of different data types, gathered at...
Satellite observations of a surtseyan eruption: Hunga Ha'apai, Tonga
R. Greg Vaughan, Peter W. Webley
2010, Journal of Volcanology and Geothermal Research (198) 177-186
On March 17, 2009, a surtseyan eruption occurred around Hunga Ha'apai Island, Tonga. A series of observations from the high-spatial resolution Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), and the high-temporal resolution Moderate Resolution Imaging Spectroradiometer (MODIS), was used to estimate the magnitude, location, start time, and duration of...
Landscape influences on genetic differentiation among bull trout populations in a stream-lake network
M.H. Meeuwig, C.S. Guy, S.T. Kalinowski, W.A. Fredenberg
2010, Molecular Ecology (19) 3620-3633
This study examined the influence of landscape heterogeneity on genetic differentiation between migratory bull trout (Salvelinus confluentus) populations in Glacier National Park, Montana. An information-theoretic approach was used to compare different conceptual models of dispersal associated with barriers, different models of isolation by distance, and the combined effects of barriers,...
An approach to quantify sources, seasonal change, and biogeochemical processes affecting metal loading in streams: Facilitating decisions for remediation of mine drainage
B. A. Kimball, R.L. Runkel, K. Walton-Day
2010, Applied Geochemistry (25) 728-740
Historical mining has left complex problems in catchments throughout the world. Land managers are faced with making cost-effective plans to remediate mine influences. Remediation plans are facilitated by spatial mass-loading profiles that indicate the locations of metal mass-loading, seasonal changes, and the extent of biogeochemical processes. Field-scale experiments during both...
Effects of exploitation on black bear populations at White River National Wildlife Refuge
J. D. Clark, R. Eastridge, M.J. Hooker
2010, Journal of Wildlife Management (74) 1448-1456
We live-trapped American black bears (Ursus americanus) and sampled DNA from hair at White River National Wildlife Refuge, Arkansas, USA, to estimate annual population size (N), growth (λ), and density. We estimated N and λ with open population models, based on live-trapping data collected from 1998 through 2006, and robust...
Phosphorus dynamics in soils irrigated with reclaimed waste water or fresh water - A study using oxygen isotopic composition of phosphate
I. Zohar, A. Shaviv, M. Young, Carol Kendall, Steven R. Silva, A. Paytan
2010, Geoderma (159) 109-121
Transformations of phosphate (Pi) in different soil fractions were tracked using the stable isotopic composition of oxygen in phosphate (δ18Op) and Pi concentrations. Clay soil from Israel was treated with either reclaimed waste water (secondary, low grade) or with fresh water amended with a chemical fertilizer of a known isotopic...
Mercury in mosses Hylocomium splendens (Hedw.) B.S.G. and Pleurozium schreberi (Brid.) Mitt. from Poland and Alaska: Understanding the origin of pollution sources
Z.M. Migaszewski, A. Galuszka, ogonekgowska S. Dole, J.G. Crock, P. J. Lamothe
2010, Ecotoxicology and Environmental Safety (73) 1345-1351
This report shows baseline concentrations of mercury in the moss species Hylocomium splendens and Pleurozium schreberi from the Kielce area and the remaining Holy Cross Mountains (HCM) region (south-central Poland), and Wrangell-Saint Elias National Park and Preserve (Alaska) and Denali National Park and Preserve (Alaska). Like mosses from many European...
