Geologie study off gravels of the Agua Fria River, Phoenix, AZ
W. H. Langer, E. Dewitt, D.T. Adams, T. O’Briens
2010, Mining Engineering (62) 27-31
The annual consumption of sand and gravel aggregate in 2006 in the Phoenix, AZ metropolitan area was about 76 Mt (84 million st) (USGS, 2009), or about 18 t (20 st) per capita. Quaternary alluvial deposits in the modern stream channel of the Agua Fria River west of Phoenix are...
Meteorite and meteoroid: New comprehensive definitions
A.E. Rubin, J. N. Grossman
2010, Meteoritics and Planetary Science (45) 117-125
Meteorites have traditionally been defined as solid objects that have fallen to Earth from space. This definition, however, is no longer adequate. In recent decades, man-made objects have fallen to Earth from space, meteorites have been identified on the Moon and Mars, and small interplanetary objects have impacted orbiting spacecraft....
The response of stream fish to local and reach-scale variation in the occurrence of a benthic aquatic macrophyte
J.E. Argentina, Mary C. Freeman, B. J. Freeman
2010, Freshwater Biology (55) 643-653
The aquatic macrophyte Podostemum ceratophyllum has been shown to increase stream productivity, abundance and biomass of benthic invertebrates, and local occurrences of some stream fishes. However, experimental evidence that fishes preferentially associate with Podostemum is lacking, and the value of Podostemum as a predictor of stream fish assemblage composition has...
Exploring the limits of identifying sub-pixel thermal features using ASTER TIR data
R. Greg Vaughan, Laszlo P. Keszthelyi, Ashley G. Davies, David J. Schneider, Cheryl Jaworowski, Henry Heasler
2010, Journal of Volcanology and Geothermal Research (189) 225-237
Understanding the characteristics of volcanic thermal emissions and how they change with time is important for forecasting and monitoring volcanic activity and potential hazards. Satellite instruments view volcanic thermal features across the globe at various temporal and spatial resolutions. Thermal features that may be a precursor to a major eruption,...
A shallow subsurface controlled release facility in Bozeman, Montana, USA, for testing near surface CO2 detection techniques and transport models
L.H. Spangler, L.M. Dobeck, K.S. Repasky, A.R. Nehrir, S.D. Humphries, C.J. Keith, J.A. Shaw, J.H. Rouse, A.B. Cunningham, S.M. Benson, C.M. Oldenburg, J.L. Lewicki, A.W. Wells, J.R. Diehl, B.R. Strazisar, J.E. Fessenden, T.A. Rahn, J.E. Amonette, J.L. Barr, W.L. Pickles, J.D. Jacobson, E. A. Silver, E.J. Male, H.W. Rauch, K.S. Gullickson, R. Trautz, Yousif K. Kharaka, J. Birkholzer, L. Wielopolski
2010, Environmental Earth Sciences (60) 227-239
A controlled field pilot has been developed in Bozeman, Montana, USA, to study near surface CO2 transport and detection technologies. A slotted horizontal well divided into six zones was installed in the shallow subsurface. The scale and CO2 release rates were chosen to be relevant to developing monitoring strategies for...
Occurrence of organic wastewater and other contaminants in cave streams in northeastern Oklahoma and northwestern Arkansas
Joseph R. Bidwell, Carol Becker, S. Hensley, R. Stark, Michael T. Meyer
2010, Archives of Environmental Contamination and Toxicology (58) 286-298
The prevalence of organic wastewater compounds in surface waters of the United States has been reported in a number of recent studies. In karstic areas, surface contaminants might be transported to groundwater and, ultimately, cave ecosystems, where they might impact resident biota. In this study, polar organic chemical integrative samplers...
Geochemistry of trace elements in coals from the Zhuji Mine, Huainan Coalfield, Anhui, China
R. Sun, Gaisheng Liu, Lingyun Zheng, C. L. Chou
2010, International Journal of Coal Geology (81) 81-96
The abundances of nine major elements and thirty-eight trace elements in 520 samples of low sulfur coals from the Zhuji Mine, Huainan Coalfield, Anhui, China, were determined. Samples were mainly collected from 10 minable coal seams of 29 boreholes during exploration. The B content in coals shows that the influence...
Numerical simulation of magmatic hydrothermal systems
S. E. Ingebritsen, S. Geiger, S. Hurwitz, T. Driesner
2010, Reviews of Geophysics (48)
The dynamic behavior of magmatic hydrothermal systems entails coupled and nonlinear multiphase flow, heat and solute transport, and deformation in highly heterogeneous media. Thus, quantitative analysis of these systems depends mainly on numerical solution of coupled partial differential equations and complementary equations of state (EOS). The past 2 decades have...
Nearshore concentration of pink shrimp (Farfantepenaeus duorarum) postlarvae in northern Florida bay in relation to nocturnal flood tide
Maria M. Criales, M. B. Robblee, Joan A. Browder, H. Cardenas, Thomas L. Jackson
2010, Bulletin of Marine Science (86) 53-74
We address the question of whether the low abundance of juvenile pink shrimp Farfantepenaeus duorarum (Burkenroad, 1939) in northern-central Florida Bay results from (i) limiting environmental conditions, (ii) a reduced postlarval transport, or (iii) both. To explore this question, postlarvae were collected during the new moon in both summer and...
Probable causes of increasing brucellosis in free-ranging elk of the Greater Yellowstone Ecosystem
Paul C. Cross, E.K. Cole, A. P. Dobson, W.H. Edwards, K.L. Hamlin, G. Luikart, A.D. Middleton, B.M. Scurlock, P.J. White
2010, Ecological Applications (20) 278-288
While many wildlife species are threatened, some populations have recovered from previous overexploitation, and data linking these population increases with disease dynamics are limited. We present data suggesting that free-ranging elk (Cervus elaphus) are a maintenance host for Brucella abortus in new areas of the Greater Yellowstone Ecosystem (GYE). Brucellosis...
The vegetation outlook (VegOut): a new method for predicting vegetation seasonal greenness
T. Tadesse, B. Wardlow, M. Hayes, M. Svoboda, J. Brown
2010, GIScience and Remote Sensing (47) 25-52
The vegetation outlook (VegOut) is a geospatial tool for predicting general vegetation condition patterns across large areas. VegOut predicts a standardized seasonal greenness (SSG) measure, which represents a general indicator of relative vegetation health. VegOut predicts SSG values at multiple time steps (two to six weeks into the future) based...
Piscicides and invertebrates: after 70 years, does anyone really know?
M.R. Vinson, E.C. Dinger, D.K. Vinson
2010, Fisheries (35) 61-71
The piscicides rotenone and antimycin have been used for more than 70 years to manage fish populations by eliminating undesirable fish species. The effects of piscicides on aquatic invertebrate assemblages are considered negligible by some and significant by others. This difference of opinion has created contentious situations and delayed native...
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...
Food habits of stunted and non-stunted white perch (Morone americana)
N.J.C. Gosch, J.R. Stittie, K.L. Pope
2010, Journal of Freshwater Ecology (25) 31-39
We studied food habits of white perch (Morone americana) from two populations with different stable states (stunted [Branched Oak Lake, Nebraska] and non-stunted [Pawnee Lake, Nebraska]) to determine if change in food habits of white perch is likely to occur in situations where a stunted white perch population is altered...
Silica-rich deposits and hydrated minerals at Gusev Crater, Mars: Vis-NIR spectral characterization and regional mapping
M.S. Rice, J.F. Bell III, E.A. Cloutis, A. Wang, S. W. Ruff, M.A. Craig, D.T. Bailey, J. R. Johnson, P.A. De Souza Jr., W. H. Farrand
2010, Icarus (205) 375-395
The Mars Exploration Rover (MER) Spirit has discovered surprisingly high concentrations of amorphous silica in soil and nodular outcrops in the Inner Basin of the Columbia Hills. In Pancam multispectral observations, we find that an absorption feature at the longest Pancam wavelength (1009 nm) appears to be characteristic of these...
Do common eiders nest in kin groups? Microgeographic genetic structure in a philopatric sea duck
Sarah A. Sonsthagen, Sandra L. Talbot, Richard B. Lanctot, Kevin G. McCracken
2010, Molecular Ecology (19) 647-657
We investigated local genetic associations among female Pacific common eiders (Somateria mollissima v-nigrum) nesting in a stochastic Arctic environment within two groups of barrier islands (Simpson Lagoon and Mikkelsen Bay) in the Beaufort Sea, Alaska. Nonrandom genetic associations were observed among nesting females using regional spatial autocorrelation analyses for distance...
Irrigated areas of India derived using MODIS 500 m time series for the years 2001-2003
V. Dheeravath, P.S. Thenkabail, G. Chandrakantha, P. Noojipady, G.P.O. Reddy, C.M. Biradar, M.K. Gumma, M. Velpuri
2010, ISPRS Journal of Photogrammetry and Remote Sensing (65) 42-59
The overarching goal of this research was to develop methods and protocols for mapping irrigated areas using a Moderate Resolution Imaging Spectroradiometer (MODIS) 500 m time series, to generate irrigated area statistics, and to compare these with ground- and census-based statistics. The primary mega-file data-cube (MFDC), comparable to a hyper-spectral...
Soil carbon flux following pulse precipitation events in the shortgrass steppe
S.M. Munson, T.J. Benton, W.K. Lauenroth, I.C. Burke
2010, Ecological Research (25) 205-211
Pulses of water availability characterize semiarid and arid ecosystems. Most precipitation events in these ecosystems are small (???10 mm), but can stimulate carbon flux. The large proportion of carbon stored belowground and small carbon inputs create the potential for these small precipitation events to have large effects on carbon cycling....
Effects of lipid extraction on stable isotope ratios in avian egg yolk: Is arithmetic correction a reliable alternative?
S. Oppel, R.N. Federer, D. M. O’Brien, A.N. Powell, Tuula E. Hollmén
2010, The Auk (127) 72-78
Many studies of nutrient allocation to egg production in birds use stable isotope ratios of egg yolk to identify the origin of nutrients. Dry egg yolk contains >50% lipids, which are known to be depleted in 13C. Currently, researchers remove lipids from egg yolk using a chemical lipid-extraction procedure before...
Evaluation of aquifer heterogeneity effects on river flow loss using a transition probability framework
N.B. Engdahl, E. T. Vogler, G.S. Weissmann
2010, Water Resources Research (46)
River-aquifer exchange is considered within a transition probability framework along the Rio Grande in Albuquerque, New Mexico, to provide a stochastic estimate of aquifer heterogeneity and river loss. Six plausible hydrofacies configurations were determined using categorized drill core and wetland survey data processed through the TPROGS geostatistical package. A base...
Model selection bias and Freedman's paradox
P.M. Lukacs, K.P. Burnham, David R. Anderson
2010, Annals of the Institute of Statistical Mathematics (62) 117-125
In situations where limited knowledge of a system exists and the ratio of data points to variables is small, variable selection methods can often be misleading. Freedman (Am Stat 37:152-155, 1983) demonstrated how common it is to select completely unrelated variables as highly "significant" when the number of data points...
Measurement of field-saturated hydraulic conductivity on fractured rock outcrops near Altamura (Southern Italy) with an adjustable large ring infiltrometer
Maria C. Caputo, L. de Carlo, C. Masciopinto, J. R. Nimmo
2010, Environmental Earth Sciences (60) 583-590
Up to now, field studies set up to measure field-saturated hydraulic conductivity to evaluate contamination risks, have employed small cylinders that may not be representative of the scale of measurements in heterogeneous media. In this study, a large adjustable ring infiltrometer was designed to be installed on-site directly on rock...
The High Resolution Imaging Science Experiment (HiRISE) during MRO's Primary Science Phase (PSP)
Alfred S. McEwen, Maria E. Banks, Nicole Baugh, Kris J. Becker, Aaron Boyd, James W. Bergstrom, Ross A. Beyer, Edward Bortolini, Nathan T. Bridges, Shane Byrne, Bradford Castalia, Frank C. Chuang, Larry S. Crumpler, Ingrid J. Daubar, Alix K. Davatzes, Donald G. Deardorff, Alaina DeJong, W. Alan Delamere, Eldar Z. Noe Dobrea, Colin M. Dundas, Eric M. Eliason, Yisrael Espinoza, Audrie Fennema, Kathryn E. Fishbaugh, Terry Forrester, Paul E. Geissler, John A. Grant, Jennifer L. Griffes, John P. Grotzinger, Virginia C. Gulick, Candice J. Hansen, Kenneth E. Herkenhoff, Rodney Heyd, Windy L. Jaeger, Dean Jones, Bob Kanefsky, Laszlo P. Keszthelyi, Robert King, Randolph L. Kirk, Kelly J. Kolb, Jeffrey Lasco, Alexandra Lefort, Richard Leis, Kevin W. Lewis, Sara Martinez-Alonso, Sarah Mattson, Guy K. McArthur, Michael T. Mellon, Joannah Metz, Moses P. Milazzo, Ralph E. Milliken, Tahirih Motazedian, Chris Okubo, Albert Ortiz, Andrea J. Philippoff, Joseph Plassmann, Anjani Polit, Patrick S. Russell, Christian Schaller, Mindi L. Searls, Timothy Spriggs, Steve W. Squyres, Steven Tarr, Nicolas Thomas, Bradley J. Thomson, Livio L. Tornabene, Charlie Van Houten, Circe Verba, Catherine M. Weitz, James J. Wray
2010, Icarus (205) 2-37
The High Resolution Imaging Science Experiment (HiRISE) on the Mars Reconnaissance Orbiter (MRO) acquired 8 terapixels of data in 9137 images of Mars between October 2006 and December 2008, covering ∼0.55% of the surface. Images are typically 5–6 km wide with 3-color coverage over the central 20% of the swath, and their...
Conserving migratory land birds in the New World: Do we know enough?
John Faaborg, Richard T. Holmes, A.D. Anders, K.L. Bildstein, K.M. Dugger, S.A. Gauthreaux Jr., P. Heglund, K.A. Hobson, A.E. Jahn, Douglas H. Johnson, S.C. Latta, D.J. Levey, P.P. Marra, C.L. Merkord, E. Nol, S.I. Rothstein, T.W. Sherry, Sillett T. Scott, F. R. Thompson III, N. Warnock
2010, Ecological Applications (20) 398-418
Migratory bird needs must be met during four phases of the year: breeding season, fall migration, wintering, and spring migration; thus, management may be needed during all four phases. The bulk of research and management has focused on the breeding season, although several issues remain unsettled, including the spatial extent...
Polychlorinated biphenyls, dioxins, furans, and organochlorine pesticides in spotted sandpiper eggs from the upper Hudson River basin, New York
Thomas W. Custer, Christine M. Custer, Brian R. Gray
2010, Ecotoxicology (19) 391-404
In 2004, spotted sandpipers (Actitis macularia) were studied on the Hudson River near Fort Edward south to New Baltimore, NY and on two river drainages that flow into the Hudson River. Concentrations of 28 organochlorine pesticides, 160 polychlorinated biphenyl (PCB) congeners, and 17 dioxin and furan (PCDD-F) congeners...
