The composition and morphology of amphiboles from the Rainy Creek complex, near Libby, Montana
G.P. Meeker, A.M. Bern, I. K. Brownfield, H.A. Lowers, S. J. Sutley, T.M. Hoefen, J.S. Vance
2003, American Mineralogist (88) 1955-1969
Thirty samples of amphibole-rich rock from the largest mined vermiculite deposit in the world in the Rainy Creek alkaline-ultramafic complex near Libby, Montana, were collected and analyzed. The amphibole-rich rock is the suspected cause of an abnormally high number of asbestos-related diseases reported in the residents of Libby, and in...
Automated storm water sampling on small watersheds
R. D. Harmel, K. W. King, R.M. Slade
2003, Applied Engineering in Agriculture (19) 667-674
Few guidelines are currently available to assist in designing appropriate automated storm water sampling strategies for small watersheds. Therefore, guidance is needed to develop strategies that achieve an appropriate balance between accurate characterization of storm water quality and loads and limitations of budget, equipment, and personnel. In this article, we...
The Impact of Turtle Excluder Devices and Fisheries Closures on Loggerhead and Kemp's Ridley Strandings in the Western Gulf of Mexico
R.L. Lewison, L.B. Crowder, D.J. Shaver
2003, Conservation Biology (17) 1089-1097
The Sea Turtle Stranding and Salvage Network has been monitoring turtle strandings for more than 20 years in the United States. High numbers of strandings in the early to mid-1980s prompted regulations to require turtle excluder devices (TEDs) on shrimping vessels (trawlers). Following year-round TED implementation in 1991, however, stranding...
Using 1-Hz GPS data to measure deformations caused by the denali fault earthquake
K.M. Larson, P. Bodin, J. Gomberg
2003, Science (300) 1421-1424
The 3 November 2002 moment magnitude 7.9 Denali fault earthquake generated large, permanent surface displacements in Alaska and large-amplitude surface waves throughout western North America. We find good agreement between strong ground-motion records integrated to displacement and 1-hertz Global Positioning System (GPS) position estimates collected ??? 140 kilometers from the...
Surface water qualit: Revisiting nitrate concentrations in the Des Moines River: 1945 and 1976-2001
G.F. McIsaac, R.D. Libra
2003, Journal of Environmental Quality (32) 2280-2289
Recent compilations of historical and contemporary riverine nitrate (NO3) concentrations indicate that concentrations in many rivers in the north-central USA increased during the second half of the 20th century. The Des Moines River near Des Moines, Iowa, however, was reported to have had similar NO3 concentrations in 1945 and the 1980s,...
Bedload component of glacially discharged sediment: Insights from the Matanuska Glacier, Alaska
J.T. Pearce, F.J. Pazzaglia, E.B. Evenson, D. E. Lawson, R. B. Alley, D. Germanoski, J.D. Denner
2003, Geology (31) 7-10
The flux of glacially derived bedload and the proportions of the suspended and bedload components carried by proglacial streams are highly debated. Published data indicate a large range-from 75%-in the bedload percentage of the total load. Two "vents," where supercooled subglacial meltwater and sediment are discharged, were sampled...
High-resolution seismic stratigraphy of an Holocene lacustrine delta in western Lake Geneva (Switzerland)
I. Baster, S. Girardclos, A. Pugin, W. Wildi
2003, Ecologae Geologicae Helvetiae (96)
A high-resolution seismic survey was conducted in western Lake Geneva on a small delta formed by the Promenthouse, the Asse and the Boiron rivers. This dataset provides information on changes in the geometry and sedimentation patterns of this delta from Late-glacial to Present. The geometry of the deposits of the...
A new cation-exchange method for accurate field speciation of hexavalent chromium
J.W. Ball, R. Blaine McCleskey
2003, Talanta (61) 305-313
A new method for field speciation of Cr(VI) has been developed to meet present stringent regulatory standards and to overcome the limitations of existing methods. The method consists of passing a water sample through strong acid cation-exchange resin at the field site, where Cr(III) is retained while Cr(VI) passes into...
Ecology of selected marine communities in Glacier Bay: Zooplankton, forage fish, seabirds and marine mammals
Martin D. Robards, Gary S. Drew, John F. Piatt, Jennifer Marie Anson, Alisa A. Abookire, James L. Bodkin, Philip N. Hooge, Suzann G. Speckman
2003, Report
We studied oceanography (including primary production), secondary production, small schooling fish (SSF), and marine bird and mammal predators in Glacier Bay during 1999 and 2000. Results from these field efforts were combined with a review of current literature relating to the Glacier Bay environment. Since the conceptual model developed by...
Quaternary low-angle slip on detachment faults in Death Valley, California
N.W. Hayman, J.R. Knott, D.S. Cowan, E. Nemser, A.M. Sarna-Wojcicki
2003, Geology (31) 343-346
Detachment faults on the west flank of the Black Mountains (Nevada and California) dip 29??-36?? and cut subhorizontal layers of the 0.77 Ma Bishop ash. Steeply dipping normal faults confined to the hanging walls of the detachments offset layers of the 0.64 Ma Lava Creek B tephra and the base...
Elevated lateral stress in unlithified sediment, Midcontinent, United States - geotechnical and geophysical indicators for a tectonic origin
E.W. Woolery, J.A. Schaefer, Z. Wang
2003, Tectonophysics (368) 139-153
Indirect and direct geotechnical measurements revealed the presence of high lateral earth pressure (Ko) in shallow, unlithified sediment at a site in the northernmost Mississippi embayment region of the central United States. Results from pile-load and pressuremeter tests showed maximum Ko values greater than 10; however, the complex geologic environment...
Mercury from mineral deposits and potential environmental impact
J. J. Rytuba
2003, Environmental Geology (43) 326-338
Mercury deposits are globally distributed in 26 mercury mineral belts. Three types of mercury deposits occur in these belts: silica-carbonate, hot-spring, and Almaden. Mercury is also produced as a by-product from several types of gold-silver and massive sulfide deposits, which account for 5% of the world's production. Other types of...
Home-range size and habitat used by the northern myotis (Myotis septentrionalis)
Sheldon F. Owen, M. A. Menzel, W. Mark Ford, Brian R. Chapman, Karl V. Miller, John W. Edwards, Petra B. Wood
2003, American Midland Naturalist (150) 352-359
We examined home range size and habitat use of nine female northern myotis (Myotis septentrionalis) within an intensively managed forest in the central Appalachians of West Virginia. Using the 95% adaptive kernel method, we calculated a mean home range of 65 ha. Northern myotis used recent diameter-limit harvests and...
Sustainable Land Use Requires Attention to Ecological Signals
W. L. Halvorson, A.E. Castellanos, J. Murrieta-Saldivar
2003, Environmental Management (32) 551-558
This case study details the difficulties of landscape management, highlighting the challenges inherent in managing natural resources when multiple agencies are involved, when the land users have no incentive for conservation, and when government agencies have too few resources for effective management. Pumping of groundwater from the aquifer of La...
Seabird tissue archival and monitoring project: Egg collections and analytical results 1999-2002
Stacy S. Vander Pol, Steven J. Christopher, David G. Roseneau, Paul R. Becker, Russel D. Day, John R. Kucklick, Rebecca S. Pugh, Kristin S. Simac, Geoff Weston-York
2003, Report
In 1998, the U.S. Geological Survey Biological Resources Division (USGS-BRD), the U.S. Fish and Wildlife Service (USFWS) Alaska Maritime National Wildlife Refuge (AMNWR), and the National Institute of Standards and Technology (NIST) began the Seabird Tissue Archival and Monitoring Project (STAMP) to collect and cryogenically bank tissues from seabirds in...
Source mechanism of long-period events at Kusatsu-Shirane Volcano, Japan, inferred from waveform inversion of the effective excitation functions
M. Nakano, Hiroyuki Kumagai, B. A. Chouet
2003, Journal of Volcanology and Geothermal Research (122) 149-164
We investigate the source mechanism of long-period (LP) events observed at Kusatsu-Shirane Volcano, Japan, based on waveform inversions of their effective excitation functions. The effective excitation function, which represents the apparent excitation observed at individual receivers, is estimated by applying an autoregressive filter to the LP waveform. Assuming a point...
A rapid procedure for the determination of thorium, uranium, cadmium and molybdenum in small sediment samples by inductively coupled plasma-mass spectrometry: Application in Chesapeake Bay
Yen Zheng, B. Weinman, T. Cronin, M.Q. Fleisher, Robert F. Anderson
2003, Applied Geochemistry (18) 539-549
This paper describes a rapid procedure that allows precise analysis of Mo, Cd, U and Th in sediment samples as small as 10 mg by using a novel approach that utilizes a "pseudo" isotope dilution for Th and conventional isotope dilution for Mo, Cd and U by ICP-MS. Long-term reproducibility...
Morphological impacts of extreme storms on sandy beaches and barriers
R.A. Morton, A. H. Sallenger Jr.
2003, Journal of Coastal Research (19) 560-573
Historical extreme storms that struck the Gulf Coast and Atlantic Coast regions of the United States caused several different styles of morphological response and resulted in a wide range of washover penetration distances. The post- storm erosional responses included dune scarps, channel incisions, and washouts, whereas depositional responses included perched...
Geomorphic, water quality and fish community patterns associated with the distribution of Notropis topeka in a Central Missouri Watershed
M.A. Bayless, M.G. McManus, J.F. Fairchild
2003, American Midland Naturalist (150) 58-72
The Topeka shiner (Notropis topeka) is a small native cyprinid species that has declined throughout its range in the Central Great Plains Region of the United States. Declines of the species have been associated with numerous factors including water quality, physical habitat alteration and predation. The N. topeka occurs in...
Recent and historical distributions of Canada lynx in Maine and the Northeast
C.L. Hoving, R.A. Joseph, W.B. Krohn
2003, Northeastern Naturalist (10) 363-382
The contiguous United States population of Canada lynx (Lynx canadensis Kerr) is listed as threatened under the federal Endangered Species Act. However, the historic distribution of lynx in the Northeast is poorly understood. We used museum records, bibliographic records, and interviews to reconstruct the past distribution of lynx in Maine,...
Concentrations and co-occurrence correlations of 88 volatile organic compounds (VOCs) in the ambient air of 13 semi-rural to urban locations in the United States
J. F. Pankow, W. Luo, D.A. Bender, L.M. Isabelle, J.S. Hollingsworth, C. Chen, W.E. Asher, J.S. Zogorski
2003, Atmospheric Environment (37) 5023-5046
The ambient air concentrations of 88 volatile organic compounds were determined in samples taken at 13 semi-rural to urban locations in Maine, Massachusetts, New Jersey, Pennsylvania, Ohio, Illinois, Louisiana, and California. The sampling periods ranged from 7 to 29 months, yielding a large data set with a total of 23,191...
Influence of salinity on the localization of Na+/K +-ATPase, Na+/K+/2Cl- cotransporter (NKCC) and CFTR anion channel in chloride cells of the Hawaiian goby (Stenogobius hawaiiensis)
S. D. McCormick, K. Sundell, Bjorn Thrandur Bjornsson, C. L. Brown, J. Hiroi
2003, Journal of Experimental Biology (206) 4575-4583
Na+/K+-ATPase, Na+/K+/2Cl- cotransporter (NKCC) and cystic fibrosis transmembrane conductance regulator (CFTR) are the three major transport proteins thought to be involved in chloride secretion in teleost fish. If this is the case, the levels of these transporters should be high in chloride cells of seawater-acclimated fish. We therefore examined the...
Estimating black bear population density and genetic diversity at Tensas River, Louisiana using microsatellite DNA markers
Mark R. Boersen, Joseph D. Clark, Tim L. King
2003, Wildlife Society Bulletin (31) 197-207
The Recovery Plan for the federally threatened Louisiana black bear (Ursus americanus luteolus) mandates that remnant populations be estimated and monitored. In 1999 we obtained genetic material with barbed-wire hair traps to estimate bear population size and genetic diversity at the 329-km2 Tensas River Tract, Louisiana. We constructed and monitored...
Extreme 34S depletions in ZnS at the Mike gold deposit, Carlin Trend, Nevada: Evidence for bacteriogenic supergene sphalerite
T.M. Bawden, M.T. Einaudi, B.C. Bostick, A. Meibom, J. Wooden, J.W. Norby, M.J.T. Orobona, C. P. Chamberlain
2003, Geology (31) 913-916
We identified submicrometer-sized framboidal sphalerite (ZnS) below the base of supergene oxidation in a Carlin-type gold deposit of Eocene age in Nevada, United States, where the framboidal sphalerite forms a blanket-like body containing >400,000 metric tons of zinc. Framboidal sphalerite <0.1 ??m in diameter, formed in the early Miocene, ranges...
Setting an effective TMDL: Sediment loading and effects of suspended sediment on fish
B. Vondracek, J. K. H. Zimmerman, J.V. Westra
2003, Journal of the American Water Resources Association (39) 1005-1015
The Agricultural Drainage and Pesticide Transport model was used to examine the relationship between fish and suspended sediment in the context of a proposed total maximum daily load (TMDL) in two agricultural watersheds in Minnesota. During a 50-year simulation, Wells Creek, a third-order cold water stream, had an estimated 1,164 events (i.e., one or more...
