Brine delineation and monitoring with electrical resistivity tomography and electromagnetic borehole logging at the Fort Knox well field near West Point, Kentucky
Rory Henderson, Michael D. Unthank, Douglas D. Zettwoch, John W. Lane Jr.
2010, Conference Paper, Symposium on the Application of Geophysics to Engineering and Environmental Problems 2010
The potable water system at Fort Knox is threatened by brine contamination from improperly abandoned natural gas exploration wells. The Fort Knox well field is located near the town of West Point, Kentucky, in the flood plain of the Ohio River. At the site, unconsolidated sediments approximately 30 – 40...
Interpreting canopy water balance and fog screen observations: separating cloud water from wind-blown rainfall at two contrasting forest sites in Hawai'i
Thomas W. Giambelluca, J. K. DeLay, M.A. Nullet, Martha A. Scholl, Stephen B. Gingerich
L.A. Bruijnzeel, F.N. Scatena, L.S. Hamilton, editor(s)
2010, Book chapter, Tropical montane cloud forests: science for conservation and management
No abstract available....
Differentiating aquatic plant communities in a eutrophic river using hyperspectral and multispectral remote sensing
Y.Q. Tian, Q. Yu, M.J. Zimmerman, S. Flint, M.C. Waldron
2010, Freshwater Biology (55) 1658-1673
This study evaluates the efficacy of remote sensing technology to monitor species composition, areal extent and density of aquatic plants (macrophytes and filamentous algae) in impoundments where their presence may violate water-quality standards. Multispectral satellite (IKONOS) images and more than 500 in situ hyperspectral samples were acquired to map aquatic...
GIS-based spatial regression and prediction of water quality in river networks: A case study in Iowa
X. Yang, W. Jin
2010, Journal of Environmental Management (91) 1943-1951
Nonpoint source pollution is the leading cause of the U.S.'s water quality problems. One important component of nonpoint source pollution control is an understanding of what and how watershed-scale conditions influence ambient water quality. This paper investigated the use of spatial regression to evaluate the impacts of watershed characteristics on...
Modelling detection probabilities to evaluate management and control tools for an invasive species
M.T. Christy, A. A. Yackel Adams, G.H. Rodda, J. A. Savidge, C.L. Tyrrell
2010, Journal of Applied Ecology (47) 106-113
For most ecologists, detection probability (p) is a nuisance variable that must be modelled to estimate the state variable of interest (i.e. survival, abundance, or occupancy). However, in the realm of invasive species control, the rate of detection and removal is the rate-limiting step for management of this pervasive environmental...
Occurrence of avian Plasmodium and West Nile virus in culex species in Wisconsin
T. Hughes, P. Irwin, E. Hofmeister, S.M. Paskewitz
2010, Journal of the American Mosquito Control Association (26) 24-31
The occurrence of multiple pathogens in mosquitoes and birds could affect the dynamics of disease transmission. We collected adult Culex pipiens and Cx. restuans (Cx. pipiens/restuans hereafter) from sites in Wisconsin and tested them for West Nile virus (WNV) and for avian malaria (Plasmodium). Gravid Cx. pipiens/restuans were tested for...
The Middle Jurassic basinal deposits of the Surmeh Formation in the Central Zagros Mountains, southwest Iran: Facies, sequence stratigraphy, and controls
Y. Lasemi, A.H. Jalilian
2010, Carbonates and Evaporites (25) 283-295
The lower part of the Lower to Upper Jurassic Surmeh Formation consists of a succession of shallow marine carbonates (Toarcian-Aalenian) overlain by a deep marine basinal succession (Aalenian-Bajocian) that grades upward to Middle to Upper Jurassic platform carbonates. The termination of shallow marine carbonate deposition of the lower part of...
Constructing an interdisciplinary flow regime recommendation
J.M. Bartholow
2010, Journal of the American Water Resources Association (46) 892-906
It is generally agreed that river rehabilitation most often relies on restoring a more natural flow regime, but credibly defining the desired regime can be problematic. I combined four distinct methods to develop and refine month-by-month and event-based flow recommendations to protect and partially restore the ecological integrity of the...
Evidence for a twelfth large earthquake on the southern hayward fault in the past 1900 years
J. J. Lienkaemper, P. L. Williams, T.P. Guilderson
2010, Bulletin of the Seismological Society of America (100) 2024-2034
We present age and stratigraphic evidence for an additional paleoearthquake at the Tyson Lagoon site. The acquisition of 19 additional radiocarbon dates and the inclusion of this additional event has resolved a large age discrepancy in our earlier earthquake chronology. The age of event E10 was previously poorly constrained, thus...
Contrasting activity patterns of sympatric and allopatric black and grizzly bears
C.C. Schwartz, S.L. Cain, S. Podruzny, S. Cherry, L. Frattaroli
2010, Journal of Wildlife Management (74) 1628-1638
The distribution of grizzly (Ursus arctos) and American black bears (U. americanus) overlaps in western North America. Few studies have detailed activity patterns where the species are sympatric and no studies contrasted patterns where populations are both sympatric and allopatric. We contrasted activity patterns for sympatric black and grizzly bears...
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.,...
Modifications to the bottomless lift net for sampling nekton in tidal mangrove forests
C.C. McIvor, N.L. Silverman
2010, Wetlands Ecology and Management (18) 627-635
Sampling fishes in vegetated intertidal wetlands is logistically challenging. We modified the 2 ?? 3-m2 bottomless lift net developed for sampling nekton (fish and decapod crustaceans) on the surface of salt marshes for use in tidal mangrove forests with a woody (as opposed to herbaceous) underground root system. As originally...
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...
Arsenic Geochemistry and Hydrostratigraphy in Midwestern U.S. Glacial Deposits
Terry L. Root, M.B. Gotkowitz, J.M. Bahr, J.W. Attig
2010, Ground Water (48) 903-912
Arsenic concentrations exceeding the U.S. EPA's 10 ??g/L standard are common in glacial aquifers in the midwestern United States. Previous studies have indicated that arsenic occurs naturally in these aquifers in association with metal-(hydr)oxides and is released to groundwater under reducing conditions generated by microbial oxidation of organic matter. Despite...
Carbon dioxide on the satellites of Saturn: Results from the Cassini VIMS investigation and revisions to the VIMS wavelength scale
D. P. Cruikshank, A.W. Meyer, R. H. Brown, R. N. Clark, R. Jaumann, K. Stephan, C. A. Hibbitts, S.A. Sandford, R.M.E. Mastrapa, G. Filacchione, C.M.D. Ore, P. D. Nicholson, B. J. Buratti, T. B. McCord, R.M. Nelson, J.B. Dalton, K. H. Baines, D. L. Matson
2010, Icarus (206) 561-572
Several of the icy satellites of Saturn show the spectroscopic signature of the asymmetric stretching mode of C-O in carbon dioxide (CO2) at or near the nominal solid-phase laboratory wavelength of 4.2675 ??m (2343.3 cm-1), discovered with the Visible-Infrared Mapping Spectrometer (VIMS) on the Cassini spacecraft. We report here on...
The diachronous formation of the Enmyvaam and Amguema-Kanchalan volcanic fields in the Okhotsk-Chukotka volcanic belt (NE Russia): Evidence from isotopic data
V.G. Sakhno, V.F. Polin, V.V. Akinin, S.A. Sergeev, A.A. Alenicheva, P.L. Tikhomirov, E. J. Moll-Stalcup
2010, Doklady Earth Sciences (434) 1172-1178
[No abstract available]...
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...
Distribution, behavior, and transport of inorganic and methylmercury in a high gradient stream
J.R. Flanders, R.R. Turner, T. Morrison, R. Jensen, J. Pizzuto, K. Skalak, R. Stahl
2010, Applied Geochemistry (25) 1756-1769
Concentrations of Hg remain elevated in physical and biological media of the South River (Virginia, USA), despite the cessation of the industrial use of Hg in its watershed nearly six decades ago, and physical characteristics that would not seem to favor Hg(II)-methylation. A 3-a study of inorganic Hg (IHg) and...
Yield responses of ruderal plants to sucrose in invasive-dominated sagebrush steppe of the northern Great Basin
Jessi Brunson, David A. Pyke, Steven S. Perakis
2010, Restoration Ecology (18) 304-312
Restoration of sagebrush-steppe plant communities dominated by the invasive ruderals Bromus tectorum (cheatgrass) and Taeniatherum caput-medusae (medusahead) can be facilitated by adding carbon (C) to the soil, stimulating microbes to immobilize nitrogen (N) and limit inorganic N availability. Our objectives were to determine responses in (1) cheatgrass and medusahead biomass...
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...
Identification of nitrogen sources to four small lakes in the agricultural region of Khorezm, Uzbekistan
M. Shanafield, M. Rosen, L. Saito, S. Chandra, J. Lamers, Bakhriddin Nishonov
2010, Biogeochemistry (101) 357-368
Pollution of inland waters by agricultural land use is a concern in many areas of the world, and especially in arid regions, where water resources are inherently scarce. This study used physical and chemical water quality and stable nitrogen isotope (δ15N) measurements from zooplankton to examine nitrogen (N) sources and...
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...
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...
Gene movement and genetic association with regional climate gradients in California valley oak (Quercus lobata Née) in the face of climate change
Victoria L. Sork, Frank W. Davis, Robert Westfall, Alan L. Flint, Makihiko Ikegami, Hongfang Wang, Delphine Grivet
2010, Molecular Ecology (19) 3806-3823
Rapid climate change jeopardizes tree populations by shifting current climate zones. To avoid extinction, tree populations must tolerate, adapt, or migrate. Here we investigate geographic patterns of genetic variation in valley oak, Quercus lobata Née, to assess how underlying genetic structure of populations might influence this species’ ability...
Assessing macroinvertebrate biodiversity in freshwater ecosystems: Advances and challenges in dna-based approaches
M.E. Pfrender, L.C. Ferrington Jr., C.P. Hawkins, P.L. Hartzell, M. Bagley, S. Jackson, G.W. Courtney, D. P. Larsen, B.R. Creutzburg, C.A. Levesque, J.H. Epler, J.C. Morse, S. Fend, M.J. Petersen, D. Ruiter, D. Schindel, M. Whiting
2010, The Quarterly Review of Biology (85) 319-340
Assessing the biodiversity of macroinvertebrate fauna in freshwater ecosystems is an essential component of both basic ecological inquiry and applied ecological assessments. Aspects of taxonomic diversity and composition in freshwater communities are widely used to quantify water quality and measure the efficacy of remediation and restoration efforts. The accuracy and...
