Projecting avian response to linked changes in groundwater and riparian floodplain vegetation along a dryland river: A scenario analysis
Brand L. Arriana, J.C. Stromberg, D.C. Goodrich, M.D. Dixon, K. Lansey, D. Kang, D.S. Brookshire, D.J. Cerasale
2011, Ecohydrology (4) 130-142
Groundwater is a key driver of riparian condition on dryland rivers but is in high demand for municipal, industrial, and agricultural uses. Approaches are needed to guide decisions that balance human water needs while conserving riparian ecosystems. We developed a space‐for‐time substitution model that links groundwater change scenarios implemented within...
Are temperate mature forests buffered from invasive lianas?
Noel B. Pavlovic, Stacey A. Leicht-Young
2011, Journal of the Torrey Botanical Society (138) 85-92
Mature and old-growth forests are often thought to be buffered against invasive species due to low levels of light and infrequent disturbance. Lianas (woody vines) and other climbing plants are also known to exhibit lower densities in older forests. As part of a larger survey of the lianas of the...
Depositional and diagenetic variability within the Cambrian Mount Simon Sandstone: Implications for carbon dioxide sequestration
B.B. Bowen, R.I. Ochoa, N.D. Wilkens, J. Brophy, T.R. Lovell, N. Fischietto, C.R. Medina, J.A. Rupp
2011, Environmental Geosciences (18) 69-89
The Cambrian Mount Simon Sandstone is the major target reservoir for ongoing geologic carbon dioxide (CO2) sequestration demonstrations throughout the midwest United States. The potential CO2 reservoir capacity, reactivity, and ultimate fate of injected CO2 depend on textural and compositional properties determined by depositional and diagenetic histories that vary vertically and laterally...
Challenges, uncertainties, and issues facing gas production from gas-hydrate deposits
G. J. Moridis, Timothy S. Collett, M. Pooladi-Darvish, S. Hancock, C. Santamarina, R. Boswel, T. Kneafsey, J. Rutqvist, M. B. Kowalsky, M. T. Reagan, E. D. Sloan, A. K. Sum, C. A. Koh
2011, SPE Reservoir Evaluation and Engineering (14) 76-112
The current paper complements the Moridis et al. (2009) review of the status of the effort toward commercial gas production from hydrates. We aim to describe the concept of the gas-hydrate (GH) petroleum system; to discuss advances, requirements, and suggested practices in GH prospecting and GH deposit...
Strong evidence for terrestrial support of zooplankton in small lakes based on stable isotopes of carbon, nitrogen, and hydrogen
J. J. Cole, S.R. Carpenter, J. Kitchell, M. L. Pace, C.T. Solomon, Brian Weidel
2011, Proceedings of the National Academy of Sciences of the United States of America (108) 1975-1980
Cross-ecosystem subsidies to food webs can alter metabolic balances in the receiving (subsidized) system and free the food web, or particular consumers, from the energetic constraints of local primary production. Although cross-ecosystem subsidies between terrestrial and aquatic systems have been well recognized for benthic organisms in streams, rivers, and the...
Derivation of S and Pb in phanerozoic intrusion-related metal deposits from neoproterozoic sedimentary pyrite, Great Basin, United States
Peter G. Vikre, S.R. Poulson, Alan E. Koenig
2011, Economic Geology (106) 883-912
The thick (≤8 km), regionally extensive section of Neoproterozoic siliciclastic strata (terrigenous detrital succession, TDS) in the central and eastern Great Basin contains sedimentary pyrite characterized by mostly high δ34S values (−11.6 to 40.8‰, >70% exceed 10‰; 51 analyses) derived from reduction of seawater sulfate, and by markedly radiogenic Pb isotopes...
Splint coals of the Central Appalachians: Petrographic and geochemical facies of the Peach Orchard No. 3 split coal bed, southern Magoffin County, Kentucky
James C. Hower, Leslie F. Ruppert
2011, International Journal of Coal Geology (85) 268-275
The Bolsovian (Middle Pennsylvanian) Peach Orchard coal bed is one of the splint coals of the Central Appalachians. Splint coal is a name for the dull, inertinite-rich lithologies typical of coals of the region. The No. 3 Split was sampled at five locations in Magoffin County, Kentucky and analyzed for...
Cosmogenic nuclide and uranium-series dating of old, high shorelines in the western Great Basin, USA
G. Kurth, F. M. Phillips, Marith C. Reheis, J.L. Redwine, James B. Paces
2011, Geological Society of America Bulletin (123) 744-768
Closed-basin pluvial lakes are sensitive recorders of effective moisture, and they provide a terrestrial signal of climate change that can be compared to marine and ice records of glacial-interglacial cycles. Although the most recent deep-lake cycle in the western Great Basin (at ca. 16 ka) has been studied intensively, comparatively...
Influence of changing water sources and mineral chemistry on the everglades ecosystem
Paul V. McCormick, Judson Harvey, Eric Crawford
2011, Critical Reviews in Environmental Science and Technology (41) 28-63
Human influences during the previous century increased mineral inputs to the Florida Everglades by changing the sources and chemistry of surface inflows. Biogeochemical responses to this enrichment include changes in the availability of key limiting nutrients such as P, the potential for increased turnover of nutrient pools due to accelerated...
Determining the seismic source mechanism and location for an explosive eruption with limited observational data: Augustine Volcano, Alaska
P.B. Dawson, B. A. Chouet, J. Power
2011, Geophysical Research Letters (38)
Waveform inversions of the very-long-period components of the seismic wavefield produced by an explosive eruption that occurred on 11 January, 2006 at Augustine Volcano, Alaska constrain the seismic source location to near sea level beneath the summit of the volcano. The calculated moment tensors indicate the presence of a volumetric...
Fluid sources and metallogenesis in the Blackbird Co-Cu-Au-Bi-Y-REE district, Idaho, U.S.A.: Insights from major-element and boron isotopic compositions of tourmaline
Robert B. Trumbull, John F. Slack, M.-S. Krienitz, Harvey E. Belkin, M. Wiedenbeck
2011, Canadian Mineralogist (49) 225-244
Tourmaline is a widespread mineral in the Mesoproterozoic Blackbird Co–Cu–Au–Bi–Y–REE district, Idaho, where it occurs in both mineralized zones and wallrocks. We report here major-element and B-isotope compositions of tourmaline from stratabound sulfide deposits and their metasedimentary wallrocks, from mineralized and barren pipes of tourmaline breccia, from late barren quartz...
Columbus crater and other possible groundwater-fed paleolakes of Terra Sirenum, Mars
J.J. Wray, R.E. Milliken, Colin M. Dundas, Gregg A. Swayze, J. C. Andrews-Hanna, A.M. Baldridge, M. Chojnacki, J.L. Bishop, B.L. Ehlmann, S.L. Murchie, Roger N. Clark, F.P. Seelos, L.L. Tornabene, S. W. Squyres
2011, Journal of Geophysical Research E: Planets (116)
Columbus crater in the Terra Sirenum region of the Martian southern highlands contains light‐toned layered deposits with interbedded sulfate and phyllosilicate minerals, a rare occurrence on Mars. Here we investigate in detail the morphology, thermophysical properties, mineralogy, and stratigraphy of these deposits; explore their regional context; and interpret the crater's...
Why replication is important in landscape genetics: American black bear in the Rocky Mountains
Bull Short, S.A. Cushman, R. MacE, T. Chilton, K.C. Kendall, E.L. Landguth, Maurice L. Schwartz, K. McKelvey, F.W. Allendorf, G. Luikart
2011, Molecular Ecology (20) 1092-1107
We investigated how landscape features influence gene flow of black bears by testing the relative support for 36 alternative landscape resistance hypotheses, including isolation by distance (IBD) in each of 12 study areas in the north central U.S. Rocky Mountains. The study areas all contained the same basic elements, but...
Magma at depth: A retrospective analysis of the 1975 unrest at Mount Baker, Washington, USA
Juliet G. Crider, David Frank, Stephen D. Malone, Michael P. Poland, Cynthia Werner, Jacqueline Caplan-Auerbach
2011, Bulletin of Volcanology (73) 175-189
Mount Baker volcano displayed a short interval of seismically-quiescent thermal unrest in 1975, with high emissions of magmatic gas that slowly waned during the following three decades. The area of snow-free ground in the active crater has not returned to pre-unrest levels, and fumarole gas geochemistry shows a decreasing magmatic...
Formation pressure testing at the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope: Operational summary, history matching, and interpretations
B. Anderson, S. Hancock, S. Wilson, C. Enger, Timothy S. Collett, R. Boswell, R. Hunter
2011, Marine and Petroleum Geology (28) 478-492
In February 2007, the U.S. Department of Energy, BP Exploration (Alaska), and the U.S. Geological Survey, collected open-hole pressure-response data, as well as gas and water sample collection, in a gas hydrate reservoir (the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well) using Schlumberger's Modular Dynamics Formation Tester (MDT)...
Shallow conduit system at Kilauea Volcano, Hawaii, revealed by seismic signals associated with degassing bursts
Bernard Chouet, Phillip Dawson
2011, Journal of Geophysical Research B: Solid Earth (116) B12317
Eruptive activity at the summit of Kilauea Volcano, Hawaii, beginning in March, 2008 and continuing to the present time is characterized by episodic explosive bursts of gas and ash from a vent within Halemaumau Pit Crater. These bursts are accompanied by seismic signals that are well recorded by a broadband...
Analytical model for screening potential CO2 repositories
R.T. Okwen, M.T. Stewart, J.A. Cunningham
2011, Computational Geosciences (15) 755-770
Assessing potential repositories for geologic sequestration of carbon dioxide using numerical models can be complicated, costly, and time-consuming, especially when faced with the challenge of selecting a repository from a multitude of potential repositories. This paper presents a set of simple analytical equations (model), based on the work of previous...
Comparison of bottom-track to global positioning system referenced discharges measured using an acoustic Doppler current profiler
Chad R. Wagner, David S. Mueller
2011, Journal of Hydrology (401) 250-258
A negative bias in discharge measurements made with an acoustic Doppler current profiler (ADCP) can be caused by the movement of sediment on or near the streambed. The integration of a global positioning system (GPS) to track the movement of the ADCP can be used to avoid the systematic negative...
Reservoir characterization of the Mt. Simon Sandstone, Illinois Basin, USA
S.M. Frailey, J. Damico, H.E. Leetaru
2011, Conference Paper
The integration of open hole well log analyses, core analyses and pressure transient analyses was used for reservoir characterization of the Mt. Simon sandstone. Characterization of the injection interval provides the basis for a geologic model to support the baseline MVA model, specify pressure design requirements of surface equipment,...
Design of ecoregional monitoring in conservation areas of high-latitude ecosystems under contemporary climate change
Erik A. Beever, Andrea Woodward
2011, Biological Conservation (144) 1258-1269
Land ownership in Alaska includes a mosaic of federally managed units. Within its agency’s context, each unit has its own management strategy, authority, and resources of conservation concern, many of which are migratory animals. Though some units are geographically isolated, many are nevertheless linked by paths of abiotic and biotic...
Genetic diversity and demographic instability in Riftia pachyptila tubeworms from eastern Pacific hydrothermal vents
Dolly Coykendall, S.B. Johnson, S.A. Karl, R.A. Lutz, R.C. Vrijenhoek
2011, BMC Evolutionary Biology (11)
Deep-sea hydrothermal vent animals occupy patchy and ephemeral habitats supported by chemosynthetic primary production. Volcanic and tectonic activities controlling the turnover of these habitats contribute to demographic instability that erodes genetic variation within and among colonies of these animals. We examined DNA sequences from one mitochondrial and three nuclear gene...
Effects of acclimation on poststocking dispersal and physiological condition of age-1 pallid sturgeon
E.W. Oldenburg, C.S. Guy, E.S. Cureton, M.A.H. Webb, W.M. Gardner
2011, Journal of Applied Ichthyology (27) 436-443
The objective of this study was to evaluate the effects of acclimation to flow and site‐specific physicochemical water conditions on poststocking dispersal and physiological condition of age‐1 hatchery‐reared pallid sturgeon. Fish from three acclimation treatments were radio‐tagged, released at two locations (Missouri River and Marias River), and monitored using passive...
ASTER spectral analysis and lithologic mapping of the Khanneshin carbonatite volcano, Afghanistan
John C. Mars, Lawrence C. Rowan
2011, Geosphere (7) 276-289
Advanced Spaceborne Thermal and Reflection Radiometer (ASTER) data of the early Quaternary Khanneshin carbonatite volcano located in southern Afghanistan were used to identify carbonate rocks within the volcano and to distinguish them from Neogene ferruginous polymict sandstone and argillite. The carbonatitic rocks are characterized by diagnostic CO3 absorption near 11.2...
Nitrous oxide emission from denitrification in stream and river networks
J. J. Beaulieu, J. L. Tank, S. K. Hamilton, W. M. Wollheim, R. O. Hall Jr., P. J. Mulholland, B. J. Peterson, L. R. Ashkenas, L. W. Cooper, Clifford N. Dahm, W. K. Dodds, N. B. Grimm, S. L. Johnson, W. H. McDowell, G. C. Poole, Valett H. Maurice, C. P. Arango, M. J. Bernot, A. J. Burgin, C. L. Crenshaw, A. M. Helton, L. T. Johnson, J. M. O’Brien, J. D. Potter, R.W. Sheibley, D. J. Sobota, S. M. Thomas
2011, Proceedings of the National Academy of Sciences of the United States of America (108) 214-219
Nitrous oxide (N2O) is a potent greenhouse gas that contributes to climate change and stratospheric ozone destruction. Anthropogenic nitrogen (N) loading to river networks is a potentially important source of N2O via microbial denitrification that converts N to N2O and dinitrogen (N2). The...
Stationarity: Wanted dead or alive?
Harry F. Lins, Timothy A. Cohn
2011, Journal of the American Water Resources Association (47) 475-480
Aligning engineering practice with natural process behavior would appear, on its face, to be a prudent and reasonable course of action. However, if we do not understand the long‐term characteristics of hydroclimatic processes, how does one find the prudent and reasonable course needed for water management? We consider this question...
