Concentrations of arsenic, cadmium, copper, lead, selenium, and zinc in fish from the Mississippi River Basin, 1995
Christopher J. Schmitt
2004, Environmental Monitoring and Assessment (90) 289-321
Fish were collected in late 1995 from 34 National Contaminant Biomonitoring Program (NCBP) stations and 12 National Water Quality Assessment Program (NAWQA) stations in the Mississippi River basin (MRB), and in late 1996 from a reference site in West Virginia. The NCBP sites represented key points (dams, tributaries, etc.) in...
Alkaline hydrolysis/polymerization of 2,4,6-Trinitrotoluene: Characterization of products by 13C and 15N NMR
Kevin A. Thorn, Philip G. Thorne, Larry G. Cox
2004, Environmental Science & Technology (38) 2224-2231
Alkaline hydrolysis has been investigated as a nonbiological procedure for the destruction of 2,4,6-trinitrotoluene (TNT) in explosives contaminated soils and munitions scrap. Nucleophilic substitutions of the nitro and methyl groups of TNT by hydroxide ion are the initial steps in the alkaline degradation of TNT. Potential applications of the technique...
Zinc and lead poisoning in wild birds in the Tri-State Mining District (Oklahoma, Kansas, Missouri)
W. N. Beyer, J. Dalgam, S. Dudding, J.B. French, R. Mateo, J. Miesner, L. Sileo, J. Spann
2004, Archives of Environmental Contamination and Toxicology (48) 108-117
contaminated with Pb, Cd, and Zn from mining, milling and smelting. Metals have been dispersed heterogeneously throughout the District in the form of milled mine waste ('chat'), as flotation tailings and from smelters as aerial deposition or slag. This study was conducted to determine if the habitat has been contaminated...
In situ expression of nifD in Geobacteraceae in subsurface sediments
Dawn E. Holmes, Kelly P. Nevin, Derek R. Lovely
2004, Applied and Environmental Microbiology (70) 7251-7259
In order to determine whether the metabolic state of Geobacteraceae involved in bioremediation of subsurface sediments might be inferred from levels of mRNA for key genes, in situ expression of nifD, a highly conserved gene involved in nitrogen fixation, was investigated. When Geobacter sulfurreducens was grown without a source of...
Coring the Chesapeake Bay impact crater
C. Wylie Poag
2004, Geotimes (49) 22-25
In July 1983, the shipboard scientists of Deep Sea Drilling Project Leg 95 found an unexpected bonus in a core taken 150 kilometers east of Atlantic City, N.J. At Site 612, the scientists recovered a 10-centimeter-thick layer of late Eocene debris ejected from an impact about 36 million years ago....
Entry of alkalis into type-I chondrules at both high and low temperatures
J. N. Grossman, C. M. O’D. Alexander
2004, Meteoritics and Planetary Science (39)
[No abstract available]...
The helium isotopic chemistry of Lake Bonney, Taylor Valley, Antarctica: Timing of late holocene climate change in Antarctica
R.J. Poreda, A.G. Hunt, Lyons W. Berry, K.A. Welch
2004, Aquatic Geochemistry (10) 353-371
To better understand the long-term climate history of Antarctica, we studied Lake Bonney in Taylor Valley, Southern Victoria Land (78?? S). Helium isotope ratios and He, Ne, Ar and N2 concentration data, obtained from hydrocasts in the East (ELB) and West (WLB) Lobesof Lake Bonney, provided important constraints on the...
Scanning electron microscopy investigations of laboratory-grown gas clathrate hydrates formed from melting ice, and comparison to natural hydrates
L.A. Stern, S. H. Kirby, S. Circone, W.B. Durham
2004, American Mineralogist (89) 1162-1175
Scanning electron microscopy (SEM) was used to investigate grain texture and pore structure development within various compositions of pure sI and sII gas hydrates synthesized in the laboratory, as well as in natural samples retrieved from marine (Gulf of Mexico) and permafrost (NW Canada) settings. Several samples of methane hydrate...
Laboratory observations of red imported fire ant (Hymenoptera: Formicidae) predation upon eastern tent caterpillars (Lepidoptera: Lasiocampidae)
A.S. Garmestani, Craig R. Allen, J.A. LaBram, A.E. Peck
2004, Journal of Entomological Science (39) 472-473
No abstract available....
Hyperspectral analysis of the ultramafic complex and adjacent lithologies at Mordor, NT, Australia
L. C. Rowan, C.J. Simpson, J.C. Mars
2004, Remote Sensing of Environment (91) 419-431
The Mordor Complex consists of a series of potassic ultramafic rocks which were intruded into Proterozoic felsic gneisses and amphibolite and are overlain by quartzite and unconsolidated deposits. In situ and laboratory 0.4 to 2.5 ??m reflectance spectra show Al-OH absorption features caused by absorption in muscovite, kaolinite, and illite/smectite...
Sexual differences in the post-breeding movements and habitats selected by Western toads (Bufo boreas) in southeastern Idaho
Paul E. Bartelt, Charles R. Peterson, Robert W. Klaver
2004, Herpetologica (60) 455-467
We used radio-telemetry to study the movements and habitat use of Western toads (Bufo boreas) in the Targhee National Forest in southeastern Idaho. Eighteen toads (10 male and 8 female) that bred in a seasonally flooded pond, were fitted with radio-transmitters, tracked, and their movements mapped and analyzed with global...
St. Louis Metro East region sediment and geomorphic study
T. D. Straub
Sehlke G.Hayes D.F.Stevens D.K., editor(s)
2004, Conference Paper, Proceedings of the 2004 World Water and Environmetal Resources Congress: Critical Transitions in Water and Environmetal Resources Management
Judy's Branch, a small basin (8.64 mi2) near Glen Carbon, Illinois, is selected as a pilot site to determine sediment yield and channel erosion of streams draining the bluffs of the American Bottoms in the Metro East area of Illinois. This paper presents results of an on-going sediment and geomorphic...
Does presence of permanent fresh water affect recruitment in prairie-nesting dabbling ducks?
Gary L. Krapu, P.J. Pietz, D.A. Brandt, R. R. Cox Jr.
2004, Journal of Wildlife Management (68) 332-341
In the Prairie Pothole Region (PPR) of North Dakota, USA, American mink (Mustela vison) are a major predator of ducklings. Mink populations plummet during severe droughts, but some mink survive where permanent fresh water is available. In 1992–1993, we evaluated whether development of a permanent water body, the 125-km...
New insights on stress rotations from a forward regional model of the San Andreas fault system near its Big Bend in southern California
D.D. Fitzenz, S.A. Miller
2004, Journal of Geophysical Research B: Solid Earth (109)
Understanding the stress field surrounding and driving active fault systems is an important component of mechanistic seismic hazard assessment. We develop and present results from a time-forward three-dimensional (3-D) model of the San Andreas fault system near its Big Bend in southern California. The model boundary conditions are assessed by...
Mars chronology: Assessing techniques for quantifying surficial processes
P.T. Doran, S.M. Clifford, S.L. Forman, Larry Nyquist, D.A. Papanastassiou, B.W. Stewart, N.C. Sturchio, T. D. Swindle, T. Cerling, J. Kargel, G. McDonald, K. Nishiizumi, R. Poreda, J.W. Rice, K. Tanaka
2004, Earth-Science Reviews (67) 313-337
Currently, the absolute chronology of Martian rocks, deposits and events is based mainly on crater counting and remains highly imprecise with epoch boundary uncertainties in excess of 2 billion years. Answers to key questions concerning the comparative origin and evolution of Mars and Earth will not be forthcoming without a...
Allegheny woodrat (Neotoma magister) use of rock drainage channels on reclaimed mines in southern West Virginia
H.D. Chamblin, P.B. Wood, J.W. Edwards
2004, American Midland Naturalist (151) 346-354
Allegheny woodrats (Neotoma magister) currently receive protected status throughout their range due to population declines. Threats associated with habitat fragmentation (e.g., introduced predators, disease, loss of connectivity among subpopulations and habitat loss) may explain why Allegheny woodrats are no longer found in many areas where they existed just 25 y...
Changes in snowmelt runoff timing in western North America under a 'business as usual' climate change scenario
I.T. Stewart, Daniel Cayan, Michael D. Dettinger
2004, Climatic Change (62) 217-232
Spring snowmelt is the most important contribution of many rivers in western North America. If climate changes, this contribution may change. A shift in the timing of springtime snowmelt towards earlier in the year already is observed during 1948-2000 in many western rivers. Streamflow timing changes for the 1995-2099 period...
Occurrence of hexavalent chromium in ground water in the western Mojave Desert, California
J.W. Ball, J. A. Izbicki
2004, Applied Geochemistry (19) 1123-1135
About 200 samples from selected public supply, domestic, and observation wells completed in alluvial aquifers underlying the western Mojave Desert were analyzed for total dissolved Cr and Cr(VI). Because Cr(VI) is difficult to preserve, samples were analyzed by 3 methods. Chromium(VI) was determined in the field using both a direct...
The flora of the Cottonwood Lake Study Area, Stutsman County, North Dakota
D.M. Mushet, N.H. Euliss Jr., S.P. Lane, C.M. Goldade
2004, Prairie Naturalist (36) 43-62
The 92 ha Cottonwood Lake Study Area is located in south-central North Dakota along the eastern edge of a glacial stagnation moraine known as the Missouri Coteau. The study area has been the focus of biologic and hydrologic research since the U.S. Fish and Wildlife Service purchased the site in...
Field investigation into unsaturated flow and transport in a fault: Model analyses
H.-H. Liu, R. Salve, J.-S. Wang, G.S. Bodvarsson, D. Hudson
2004, Journal of Contaminant Hydrology (74) 39-59
Results of a fault test performed in the unsaturated zone of Yucca Mountain, Nevada, were analyzed using a three-dimensional numerical model. The fault was explicitly represented as a discrete feature and the surrounding rock was treated as a dual-continuum (fracture-matrix) system. Model calibration against seepage and water-travel-velocity data suggests that...
Less waste corn, more land in soybeans, and the switch to genetically modified crops: Trends with important implications to wildlife management
Gary L. Krapu, D.A. Brandt, R. R. Cox Jr.
2004, Wildlife Society Bulletin (32) 127-136
American agriculture has provided abundant high-energy foods for migratory and resident wildlife populations since the onset of modern wildlife management. Responding to anecdotal evidence that corn residues are declining in cropland, we remeasured waste corn postharvest in the Central Platte River Valley (CPRV) of Nebraska during 1997 and 1998 to...
Response of mountain meadows to grazing by recreational pack stock
David N. Cole, Jan W. Van Wagtendonk, Mitchel P. McClaran, Peggy E. Moore, Neil K. McDougald
2004, Journal of Range Management (57) 153-160
Effects of recreational pack stock grazing on mountain meadows in Yosemite National Park were assessed in a 5-year study. Yosemite is a designated wilderness, to be managed such that its natural conditions are preserved. Studies were conducted in 3 characteristic meadow types: shorthair sedge (Carex filifolia Nutt.), Brewer's reed grass...
Comparison of four moderate-size earthquakes in southern California using seismology and InSAR
R.J. Mellors, H. Magistrale, P. Earle, A.H. Cogbill
2004, Bulletin of the Seismological Society of America (94) 2004-2014
Source parameters determined from interferometric synthetic aperture radar (InSAR) measurements and from seismic data are compared from four moderate-size (less than M 6) earthquakes in southern California. The goal is to verify approximate detection capabilities of InSAR, assess differences in the results, and test how the two results can be...
The nucleus of Comet Borrelly: A study of morphology and surface brightness
J. Oberst, Elpitha Howington-Kraus, Randolph L. Kirk, Laurence A. Soderblom, B. Buratti, M. Hicks, R. Nelson, D. Britt
2004, Icarus (167) 70-79
Stereo images obtained during the DS1 flyby were analyzed to derive a topographic model for the nucleus of Comet 19P/Borrelly for morphologic and photometric studies. The elongated nucleus has an overall concave shape, resembling a peanut, with the lower end tilted towards the camera. The bimodal character of surface-slopes and...
Remote sensing of frozen lakes on the North Slope of Alaska
N. French, S. Savage, R. Shuchman, R. Edson, J. Payne, E. Josberger
2004, Conference Paper, International Geoscience and Remote Sensing Symposium (IGARSS)
We used synthetic aperture radar (SAR) images from the ERS-2 remote sensing satellite to map the freeze condition of lakes on Alaska's North Slope, the geographic region to the north of the Brooks Range. An mage from March 1997, to coincide with the period of maximum freeze depth, was used...
