Effects of contaminants on reproductive success of aquatic birds nesting at Edwards Air Force Base, California
R. L. Hothem, J.J. Crayon, M.A. Law
2006, Archives of Environmental Contamination and Toxicology (51) 711-719
Contamination by organochlorine pesticides (OCs), polychlorinated biphenyls, metals, and trace elements at Edwards Air Force Base (EAFB), located in the Mojave Desert, could adversely affect nesting aquatic birds, especially at the sewage lagoons that comprise Piute Ponds. Estimates of avian reproduction, in conjunction with analyses of eggs and avian foods...
Upstream migration of two pre-spawning shortnose sturgeon passed upstream of Pinopolis Dam, Cooper River, South Carolina
S.T. Finney, J. Jeffery Isely, D.W. Cooke
2006, Southeastern Naturalist (5) 369-375
Two shortnose sturgeon were artificially passed above the Pinopolis Lock and Dam into the Santee-Cooper Lakes in order to simulate the use of a fish-passage mechanism. Movement patterns and spawning behavior were studied to determine the potential success of future shortnose sturgeon migrations if and when a fish-migration bypass structure...
Volcanic history and 40Ar/39Ar and 14C geochronology of Terceira Island, Azores, Portugal
Andrew T. Calvert, Richard B. Moore, John P. McGeehin, Antonio Rodrigues da Silva
2006, Journal of Volcanology and Geothermal Research (156) 103-115
Seven new 40Ar/39Ar and 23 new radiocarbon ages of eruptive units, in support of new geologic mapping, improve the known chronology of Middle to Late Pleistocene and Holocene volcanic activity on the island of Terceira, Azores and define an east-to-west progression in stratovolcano growth. The argon ages indicate that Cinco Picos...
An exploratory method to detect tephras from quantitative XRD scans: Examples from Iceland and east Greenland marine sediments
John T. Andrews, D. D. Eberl, G.B. Kristjansdottir
2006, Holocene (16) 1035-1042
Tephras, mainly from Iceland, are becoming increasingly important in interpreting leads and lags in the Holocene climate system across NW Europe. Here we demonstrate that Quantitative Phase Analysis of x-ray diffractograms of the < 2 mm of marine sediment fraction (ie, sand, silt and clay) from Iceland and East Greenland...
Ball clay
R.L. Virta
2006, Mining Engineering (58) 19-20
In 2005, four companies including H.C. Spinks Clay, Kentucky-Tennessee Clay, Old Hickory Clay and Unimin mined ball clay in four states. Based on a preliminary survey of the ball clay industry, production reached 1.32 Mt valued at $53.3 million. Tennessee was the leading ball clay producer state with 61% of...
Geodetic antenna calibration test in the Antarctic environment
A. Grejner-Brzezinska, E. Vazquez, L. Hothem
2006, Conference Paper, Proceedings of the Institute of Navigation - 19th International Technical Meeting of the Satellite Division, ION GNSS 2006
TransAntarctic Mountain DEFormation (TAMDEF) Monitoring Network is the NSF-sponsored OSU and USGS project, aimed at measuring crustal motion in the Transantarctic Mountains of Victoria Land using GPS carrier phase measurements. Station monumentation, antenna mounts, antenna types, and data processing strategies were optimized to achieve mm-level estimates for the rates of...
A ubiquitous thermoacidophilic archaeon from deep-sea hydrothermal vents
A.-L. Reysenbach, Yajing Liu, A.B. Banta, T.J. Beveridge, J. D. Kirshtein, S. Schouten, M.K. Tivey, Karen L. Von Damm, M.A. Voytek
2006, Nature (442) 444-447
Deep-sea hydrothermal vents are important in global biogeochemical cycles, providing biological oases at the sea floor that are supported by the thermal and chemical flux from the Earth's interior. As hot, acidic and reduced hydrothermal fluids mix with cold, alkaline and oxygenated sea water, minerals precipitate to form porous sulphide-sulphate...
Estimated age structure of wolves in Northeastern Minnesota
L.D. Mech
2006, Journal of Wildlife Management (70) 1481-1483
[No abstract available]...
Oil-generation kinetics for organic facies with Type-II and -IIS kerogen in the Menilite Shales of the Polish Carpathians
M. D. Lewan, M.J. Kotarba, John B. Curtis, D. Wieclaw, P. Kosakowski
2006, Geochimica et Cosmochimica Acta (70) 3351-3368
The Menilite Shales (Oligocene) of the Polish Carpathians are the source of low-sulfur oils in the thrust belt and some high-sulfur oils in the Carpathian Foredeep. These oil occurrences indicate that the high-sulfur oils in the Foredeep were generated and expelled before major thrusting and the low-sulfur oils in the...
Tracer test with As(V) under variable redox conditions controlling arsenic transport in the presence of elevated ferrous iron concentrations
R. Hohn, M. Isenbeck-Schroter, D.B. Kent, J.A. Davis, R. Jakobsen, S. Jann, V. Niedan, C. Scholz, S. Stadler, A. Tretner
2006, Journal of Contaminant Hydrology (88) 36-54
To study transport and reactions of arsenic under field conditions, a small-scale tracer test was performed in an anoxic, iron-reducing zone of a sandy aquifer at the USGS research site on Cape Cod, Massachusetts, USA. For four weeks, a stream of groundwater with added As(V) (6.7 μM) and bromide...
A 16-year record of eolian dust in Southern Nevada and California, USA: Controls on dust generation and accumulation
M.C. Reheis
2006, Journal of Arid Environments (67) 487-520
An ongoing project monitors modern dust accumulation in the arid southwestern United States to (1) determine the rate and composition of dust inputs to soils and (2) relate dust accumulation to weather patterns to help predict the effects of climate change on dust production and accumulation. The 16-year records of...
Development of standardized lunar regolith simulant materials
P. Carpenter, L. Sibille, S. Wilson, G. Meeker
2006, Conference Paper, Microscopy and Microanalysis
[No abstract available]...
Shear velocity estimates on the inner shelf off Grays Harbor, Washington, USA
C. R. Sherwood, J.R. Lacy, G. Voulgaris
2006, Continental Shelf Research (26) 1995-2018
Shear velocity was estimated from current measurements near the bottom off Grays Harbor, Washington between May 4 and June 6, 2001 under mostly wave-dominated conditions. A downward-looking pulse-coherent acoustic Doppler profiler (PCADP) and two acoustic-Doppler velocimeters (field version; ADVFs) were deployed on a tripod at 9-m water depth. Measurements from...
Numerical modeling of a long-term in situ chemical osmosis experiment in the Pierre Shale, South Dakota
A.M. Garavito, H. Kooi, C. E. Neuzil
2006, Advances in Water Resources (29) 481-492
We have numerically modeled evolving fluid pressures and concentrations from a nine-year in situ osmosis experiment in the Pierre Shale, South Dakota. These data were obtained and recently interpreted by one of us (C.E.N.) as indicating a potentially significant role for chemical osmosis in media like the Pierre Shale. That...
Feasibility of an implantable capsule for limiting lifespan of grass carp
R.M. Thomas, L.E. Miranda, J.P. Kirk
2006, Journal of Aquatic Plant Management (44) 80-89
The grass carp (Ctenopharyngodon idella) is an herbivorous cyprinid stocked to control undesirable aquatic vegetation. However, stocking grass carp presents several problems including complete eradication of submersed aquatic vegetation, dispersal out of the target area, adverse effects on fish communities, and damage to waterfowl habitat and native vegetation. The purpose...
Macroinvertebrate assemblage recovery following a catastrophic flood and debris flows in an Appalachian mountain stream
C.D. Snyder, Z.B. Johnson
2006, Journal of the North American Benthological Society (25) 825-840
In June 1995, heavy rains caused severe flooding and massive debris flows on the Staunton River, a 3rd-order stream in the Blue Ridge Mountains (Virginia, USA). Scouring caused the loss of the riparian zone and repositioned the stream channel of the lower 2.1 km of the stream. Between 1998 and...
Post-seismic relaxation following the great 2004 Sumatra-Andaman earthquake on a compressible self-gravitating Earth
F. F. Pollitz, R. Burgmann, P. Banerjee
2006, Geophysical Journal International (167) 397-420
he Mw ??? 9.0 2004 December 26 Sumatra-Andaman and Mw =8.7 2005 March 28 Nias earthquakes, which collectively ruptured approximately 1800 km of the Andaman and Sunda subduction zones, are expected to be followed by vigorous viscoelastic relaxation involving both the upper and lower mantle. Because of these large spatial...
Late Quaternary landscape evolution in the Kunlun Mountains and Qaidam Basin, Northern Tibet: A framework for examining the links between glaciation, lake level changes and alluvial fan formation
L.A. Owen, R.C. Finkel, M. Haizhou, P.L. Barnard
2006, Quaternary International (154-155) 73-86
The Qaidam Basin in Northern Tibet is one of the largest hyper-arid intermontane basins on Earth. Alluvial fans, pediment surfaces, shorelines and a thick succession of sediments within the basin, coupled with moraines and associated landforms in the adjacent high mountain catchments of the Kunlun Mountains, record a complex history...
Habitat selection responses of parents to offspring predation risk: An experimental test
J.J. Fontaine, T. E. Martin
2006, American Naturalist (168) 811-818
The ability of nest predation to influence habitat settlement decisions in birds is widely debated, despite its importance in limiting fitness. Here, we experimentally manipulated nest predation risk across a landscape and asked the question, do migratory birds assess and respond to variation in nest predation risk when choosing breeding...
Tilts in strong ground motion
V. Graizer
2006, Bulletin of the Seismological Society of America (96) 2090-2102
Most instruments used in seismological practice to record ground motion are pendulum seismographs, velocigraphs, or accelerographs. In most cases it is assumed that seismic instruments are only sensitive to the translational motion of the instrument's base. In this study the full equation of pendulum motion, including the inputs of rotations...
Application of artificial neural networks to assess pesticide contamination in shallow groundwater
G.B. Sahoo, C. Ray, E. Mehnert, D.A. Keefer
2006, Science of the Total Environment (367) 234-251
In this study, a feed-forward back-propagation neural network (BPNN) was developed and applied to predict pesticide concentrations in groundwater monitoring wells. Pesticide concentration data are challenging to analyze because they tend to be highly censored. Input data to the neural network included the categorical indices of depth to aquifer material,...
Urine-marking and ground-scratching by free-ranging Arctic Wolves, Canis lupus arctos, in summer
L.D. Mech
2006, Canadian Field-Naturalist (120) 466-470
Urine-marking and ground-scratching were observed in an Arctic Wolf (Canis lupus) pack on Ellesmere Island, Nunavut, Canada, during 16 summers between 1986 and 2005. All previously known urination postures and ground-scratching by breeding males and females were seen, and incidence of marking and scratching was greatest when non-pack wolves were...
Prediction of resource volumes at untested locations using simple local prediction models
Emil D. Attanasi, Timothy C. Coburn, Philip A. Freeman
2006, Natural Resources Research (15) 223-239
This paper shows how local spatial nonparametric prediction models can be applied to estimate volumes of recoverable gas resources at individual undrilled sites, at multiple sites on a regional scale, and to compute confidence bounds for regional volumes based on the distribution of those estimates. An approach that combines cross-validation,...
Flow and form in rehabilitation of large-river ecosystems: an example from the Lower Missouri River
R. B. Jacobson, D.L. Galat
2006, Geomorphology (77) 249-269
On large, intensively engineered rivers like the Lower Missouri, the template of the physical habitat is determined by the nearly independent interaction of channel form and flow regime. We evaluated the interaction between flow and form by modeling four combinations of modern and historical channel form and modern and historical...
CO2 sequestration: Storage capacity guideline needed
S.M. Frailey, R.J. Finley, T.S. Hickman
2006, Oil & Gas Journal (104)
Petroleum reserves are classified for the assessment of available supplies by governmental agencies, management of business processes for achieving exploration and production efficiency, and documentation of the value of reserves and resources in financial statements. Up to the present however, the storage capacity determinations made by some organizations in the...
