Field tracer investigation of unsaturated zone flow paths and mechanisms in agricultural soils of northwestern Mississippi, USA
K. S. Perkins, J. R. Nimmo, C.E. Rose, R.H. Coupe
2011, Journal of Hydrology (396) 1-11
In many farmed areas, intensive application of agricultural chemicals and withdrawal of groundwater for irrigation have led to water quality and supply issues. Unsaturated-zone processes, including preferential flow, play a major role in these effects but are not well understood. In the Bogue Phalia basin, an intensely agricultural area in...
Constraints on mechanisms for the growth of gully alcoves in Gasa crater, Mars, from two-dimensional stability assessments of rock slopes
C.H. Okubo, L.L. Tornabene, N.L. Lanza
2011, Icarus (211) 207-221
The value of slope stability analyses for gaining insight into the geologic conditions that would facilitate the growth of gully alcoves on Mars is demonstrated in Gasa crater. Two-dimensional limit equilibrium methods are used in conjunction with high-resolution topography derived from stereo High Resolution Imaging Science Experiment (HiRISE) imagery. These...
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,...
Chapter 39 The Edwardsburg Formation and related rocks, Windermere Supergroup, central Idaho, USA
Karen Lund, Karl V. Evans, John N. Alienikoff
2011, Memoir of the Geological Society of America (36) 437-448
In central Idaho, Neoproterozoic stratified rocks are engulfed by the Late Cretaceous Idaho batholith and by Eocene volcanic and plutonic rocks of the Challis event. Studied sections in the Gospel Peaks and Big Creek areas of west-central Idaho are in roof pendants of the Idaho batholith. A drill core section...
Inventory and suitability of facilities within the Mid-Columbia Basin for the artificial propagation of Pacific lampreys
M.G. Mesa, H.E. Christiansen
2011, Report
No abstract available ...
Assessing field-scale biogeophysical signatures of bioremediation over a mature crude oil spill
Lee Slater, Dimitrios Ntarlagiannis, Estella Atekwana, Farag Mewafy, Andre Revil, Magnus Skold, Yuri Gorby, Frederick D. Day-Lewis, John W. Lane Jr., Dale D. Werkema, Jared J. Trost, Geoffrey N. Delin, William N. Herkelrath
H.V. Rectanus, R. Sirabian, editor(s)
2011, Conference Paper, Proceedings of the first international symposium on bioremediation and sustainable environmental technologies
We conducted electrical geophysical measurements at the National Crude Oil Spill Fate and Natural Attenuation Research Site (Bemidji, MN). Borehole and surface self-potential measurements do not show evidence for the existence of a biogeobattery mechanism in response to the redox gradient resulting from biodegradation of oil. The relatively small self...
Quantifying greenhouse gas emissions from coal fires using airborne and ground-based methods
Mark A. Engle, Lawrence F. Radke, Edward L. Heffern, Jennifer M.K. O’Keefe, Charles Smeltzer, James C. Hower, Judith M. Hower, Anupma Prakash, Allan Kolker, Robert J. Eatwell, Arnout ter Schure, Gerald Queen, Kerry L. Aggen, Glenn B. Stracher, Kevin R. Henke, Ricardo A. Olea, Yomayara Roman-Colon
2011, International Journal of Coal Geology (88) 147-151
Coal fires occur in all coal-bearing regions of the world and number, conservatively, in the thousands. These fires emit a variety of compounds including greenhouse gases. However, the magnitude of the contribution of combustion gases from coal fires to the environment is highly uncertain, because adequate data and methods for...
Trap style influences wild pig behavior and trapping success
B.L. Williams, R.W. Holtfreter, S.S. Ditchkoff, J. Barry Grand
2011, Journal of Wildlife Management (75) 432-436
Despite the efforts of many natural resource professionals, wild pig (Sus scrofa) populations are expanding in many areas of the world. Although many creative techniques for controlling pig populations are being explored, trapping has been and still is the most commonly used method of population control for many public and...
Expansion of tubenose gobies Proterorhinus semilunaris into western Lake Erie and potential effects on native species
P.M. Kocovsky, J.A. Tallman, D.J. Jude, D.M. Murphy, J.E. Brown, C.A. Stepien
2011, Biological Invasions (13) 2775-2784
The Eurasian freshwater tubenose goby Proterorhinus semilunaris (formerly Proterorhinus marmoratus) invaded the Laurentian Great Lakes in the 1990s, presumably via ballast water from transoceanic cargo ships. Tubenose gobies spread throughout Lake St. Clair, its tributaries, and the Detroit River system, and also are present in the Duluth-Superior harbor of Lake...
S is for sunset crater
W. H. Langer
2011, Aggregates Manager (16) 36-36
A scenic trek always includes an interesting landmark - a volcanic cinder cone....
A novel photosynthetic strategy for adaptation to low-iron aquatic environments
D. Chauhan, I.M. Folea, C.C. Jolley, R. Kouril, C.E. Lubner, S. Lin, D. Kolber, Felisa Wolfe-Simon, J.H. Golbeck, E.J. Boekema, P. Fromme
2011, Biochemistry (50) 686-692
Iron (Fe) availability is a major limiting factor for primary production in aquatic environments. Cyanobacteria respond to Fe deficiency by derepressing the isiAB operon, which encodes the antenna protein IsiA and flavodoxin. At nanomolar Fe concentrations, a PSI−IsiA supercomplex forms, comprising a PSI trimer encircled by two complete IsiA rings. This PSI−IsiA...
Balancing forest-regeneration probabilities and maintenance costs in dry grasslands of high conservation priority
Janine Bolliger, Thomas C. Edwards Jr., Stefan Eggenberg, Sascha Ismail, Irmi Seidl, Felix Kienast
2011, Conservation Biology (25) 567-576
Abandonment of agricultural land has resulted in forest regeneration in species-rich dry grasslands across European mountain regions and threatens conservation efforts in this vegetation type. To support national conservation strategies, we used a site-selection algorithm (MARXAN) to find optimum sets of floristic regions (reporting units) that contain grasslands of high...
Numerical modeling of the impact of sea-level rise on fringing coral reef hydrodynamics and sediment transport
C. D. Storlazzi, E. Elias, M.E. Field, M.K. Presto
2011, Coral Reefs (30) 83-96
Most climate projections suggest that sea level may rise on the order of 0.5-1.0 m by 2100; it is not clear, however, how fluid flow and sediment dynamics on exposed fringing reefs might change in response to this rapid sea-level rise. Coupled hydrodynamic and sediment-transport numerical modeling is consistent with...
40Ar/39Ar dating of tuff vents in the Campi Flegrei caldera (southern Italy): Toward a new chronostratigraphic reconstruction of the Holocene volcanic activity
L. Fedele, D.D. Insinga, A.T. Calvert, V. Morra, A. Perrotta, C. Scarpati
2011, Bulletin of Volcanology (73) 1323-1336
The Campi Flegrei hosts numerous monogenetic vents inferred to be younger than the 15 ka Neapolitan Yellow Tuff. Sanidine crystals from the three young Campi Flegrei vents of Fondi di Baia, Bacoli and Nisida were dated using 40Ar/39Ar geochronology. These vents, together with several other young edifices, occur roughly along the...
Phytoforensics, dendrochemistry, and phytoscreening: New green tools for delineating contaminants from past and present
J.G. Burken, D.A. Vroblesky, J.-C. Balouet
2011, Environmental Science & Technology (45) 6218-6226
As plants evolved to be extremely proficient in mass transfer with their surroundings and survive as earth’s dominant biomass, they also accumulate and store some contaminants from surroundings, acting as passive samplers. Novel applications and analytical methods have been utilized to gain information about a wide range of contaminants in...
Attempted surgical correction of single- and multiyear post-ovulatory egg stasis in yellow and red Irish lords, Hemilepidotus jordani (Bean) and Hemilepidotus hemilepidotus (Tilesius)
C.E.C. Goertz, D.M. Mulcahy
2011, Journal of Fish Diseases (34) 75-79
[No abstract available]...
Productivity of a coral reef using boundary layer and enclosure methods
W. R. McGillis, C. Langdon, B. Loose, Kimberly K. Yates, J. Corredor
2011, Geophysical Research Letters (38)
The metabolism of Cayo Enrique Reef, Puerto Rico, was studied using in situ methods during March 2009. Benthic O2 fluxes were used to calculate net community production using both the boundary layer gradient and enclosure techniques. The boundary layer O2 gradient and the drag coefficients were used to calculate productivity...
Infrasound from the 2007 fissure eruptions of Kīlauea Volcano, Hawai'i
D. Fee, M. Garces, Tim R. Orr, Michael P. Poland
2011, Geophysical Research Letters (38)
Varied acoustic signals were recorded at Kīlauea Volcano in mid-2007, coincident with dramatic changes in the volcano's activity. Prior to this time period, Pu'u 'Ō'ō crater produced near-continuous infrasonic tremor and was the primary source of degassing and lava effusion at Kīlauea. Collapse and draining of Pu'u 'Ō'ō crater...
Movement and survival of brown trout and rainbow trout in an ozark tailwater river
J.W. Quinn, T.J. Kwak
2011, North American Journal of Fisheries Management (31) 299-304
We evaluated the movement of adult brown trout Salmo trutta and rainbow trout Oncorhynchus mykiss in relation to a catch-andrelease area in the White River downstream from Beaver Dam, Arkansas. Nine fish of each species were implanted with radio transmitters and monitored from July 1996 to July 1997. The 1.5-...
Random variability explains apparent global clustering of large earthquakes
A.J. Michael
2011, Geophysical Research Letters (38)
The occurrence of 5 Mw ≥ 8.5 earthquakes since 2004 has created a debate over whether or not we are in a global cluster of large earthquakes, temporarily raising risks above long-term levels. I use three classes of statistical tests to determine if the record of M ≥ 7 earthquakes...
Hydrogeomorphic processes of thermokarst lakes with grounded-ice and floating-ice regimes on the Arctic coastal plain, Alaska
C.D. Arp, Benjamin M. Jones, F.E. Urban, G. Grosse
2011, Hydrological Processes (25) 2422-2438
Thermokarst lakes cover > 20% of the landscape throughout much of the Alaskan Arctic Coastal Plain (ACP) with shallow lakes freezing solid (grounded ice) and deeper lakes maintaining perennial liquid water (floating ice). Thus, lake depth relative to maximum ice thickness (1·5–2·0 m) represents an important threshold that impacts permafrost,...
Source and site response study of the 2008 Mount Carmel, Illinois, earthquake
S. Hartzell, C. Mendoza
2011, Bulletin of the Seismological Society of America (101) 951-963
Two separate inversions are performed using the ground-motion data from the 2008 Mount Carmel, Illinois, earthquake. One uses aftershocks as empirical Green’s functions to determine a finite-fault slip distribution. The second uses mainshock ground-motion spectra to calculate source, path, and site response parameters. The slip inversion reveals a prominent asperity...
Shallow lithological structure across the Dead Sea Transform derived from geophysical experiments
J. Stankiewicz, G. Munoz, O. Ritter, Paul A. Bedrosian, T. Ryberg, U. Weckmann, M. Weber
2011, Geochemistry, Geophysics, Geosystems (12)
In the framework of the DEad SEa Rift Transect (DESERT) project a 150 km magnetotelluric profile consisting of 154 sites was carried out across the Dead Sea Transform. The resistivity model presented shows conductive structures in the western section of the study area terminating abruptly at the Arava Fault. For...
Seasonal habitat shifts by benthic fishes in headwater streams
Adam V. Rettig, Shannon K. Brewer
2011, Proceedings of the Southeastern Association of Fish and Wildlife Agencies (65) 105-111
Fish-habitat associations in streams have been widely studied; however, temporal considerations have been neglected, particularly during the winter. We quantitatively sampled perennial headwater streams in the Missouri Ozarks during the summer (n = 13) and winter (n = 4) to evaluate possible habitat shifts by three benthic fishes at two...
Elevated gas hydrate saturation within silt and silty clay sediments in the Shenhu area, South China Sea
Xiujuan Wang, Deborah R. Hutchinson, Shiguo Wu, Shengxiong Yang, Yiqun Guo
2011, Journal of Geophysical Research B: Solid Earth (116)
Gas hydrate saturations were estimated using five different methods in silt and silty clay foraminiferous sediments from drill hole SH2 in the South China Sea. Gas hydrate saturations derived from observed pore water chloride values in core samples range from 10 to 45% of the pore space at 190–221 m...
