Causes of mortality in common loons
J. Christian Franson, David J. Cliplef
1992, Conference Paper, Proceedings from the 1992 Conference on the Loon and its Ecosystem: Status, management, and environmental concerns
Summarized are necropsy results from 222 carcasses of Common Loons (Gavia immer) submitted to the National Wildlife Health Research Center from 1976 through 1991. The carcasses were from 18 states, and 10 or more birds each were from Minnesota, Florida, Virginia, Michigan, Wisconsin, Maine, and North Carolina. Seventy-three (33%) carcasses...
An aeromagnetic survey over the northwestern Ross Ice Shelf and the McMurdo Sound area
Detlef Damaske, Uwe Meyer, Anne E. McCafferty, John Behrendt, Herbert Hoppe
1992, Polarforschung (60) 152-156
As part of the expedition GANOVEX VI 1990/91, the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), the Alfred Wegener Institute for Polar and Marine Research (AWI), and the United States Geological Survey (USGS) carried out an airborne magnetic survey over the northwestern Ross Ice Shelf and McMurdo Sound between Ross Island,...
Access to spatial environmental data for development of an oil spill response geographic
M.W. Hiland, M.R. Byrnes, R.A. McBride, S. Penland, K. Ramsey, K. Debusschere, S.J. Williams
1992, Conference Paper, Needs and solutions for pollution monitoring, control, and abatement: Proceedings of the First Thematic Conference on Remote Sensing for Marine and Coastal Environments
No abstract available....
Predicting sizes of undiscovered mineral deposits; an example using mercury deposits in California
C. F. Chung, Donald A. Singer, W. David Menzie
1992, Economic Geology (87) 1174-1179
A critical part of the exploration for mineral deposits or of quantitative mineral resource assessments is the estimation of how large undiscoveredeposits might be. Typically, this problem is addressed using grade and tonnage models in which a major source of variation in possible sizes is accounted for by the differences...
Riparian vegetation recovery patterns following stream channelization: A geomorphic perspective
Cliff R. Hupp
1992, Ecology (73) 1209-1226
Hundreds of kilometres of West Tennessee streams have been channelized since the turn of the century. After a stream is straightened, dredged, or cleared, basinwide ecologic, hydrologic, and geomorphic processes bring about an integrated, characteristic recovery sequence. The rapid pace of channel responses to channelization provides an opportunity to document...
Genetic variation in steelhead of Oregon and northern California
R.R. Reisenbichler, J.D. McIntyre, M.F. Solazzi, S.W Landino
1992, Transactions of the American Fisheries Society (121) 158-169
Steelhead Oncorhynchus mykiss from various sites between the Columbia River and the Mad River, California, were genetically characterized at 10 protein-coding loci or pairs of loci by starch gel electrophoresis. Fish from coastal streams differed from fish east of the Cascade Mountains and from fish of the Willamette River (a...
In vitro infection of salmonid epidermal tissues by infectious hematopoietic necrosis virus and viral hemorrhagic septicemia virus
T. Yamamoto, W.N. Batts, J. R. Winton
1992, Journal of Aquatic Animal Health (4) 231-239
The ability of two rhabdoviruses, infectious hematopoietic necrosis virus (IHNV) and viral hemorrhagic septicemia virus (VHSV), to infect fish skin was investigated by in vitro infection of excised tissues. Virus replication was determined by plaque assay of homogenized tissue extracts, and the virus antigen was detected by immunohistology of tissue...
Strong-motion data
C. Mueller
1992, Earthquakes & Volcanoes (USGS) (23) 124-126
The April 25, 1992, mainshock (M=7.) near Petrolia and the two largest afterschokcs (M=6.6 and M=6.7) were recorded by networks of strong-motion accelerographs operated by the U.S Geological Survey (USGS) and the State of California Strong-Motion Instrumentation Program (CSMIP). The map on the next page shows the locations of USGS...
Morphology and genesis of carbonate soils on the Kyle Canyon fan, Nevada, U.S.A.
M.C. Reheis, J.M. Sowers, E. M. Taylor, L. D. McFadden, J.W. Harden
1992, Geoderma (52) 303-342
The physical and chemical properties of soils formed in an arid climate on calcareous alluvium of the Kyle Canyon alluvial fan, southern Nevada, were studied in order to infer the rates and relative importance of various soil-forming processes. These studies included field and microscopic observations and analyses of thin sections,...
Functional response and capture timing in an individual-based model: predation by northern squawfish (Ptychocheilus oregonensis) on juvenile salmonids in the Columbia River
James H. Petersen, Donald L. DeAngelis
1992, Canadian Journal of Fisheries and Aquatic Sciences (49) 2551-2565
The behavior of individual northern squawfish (Ptychocheilus oregonensis) preying on juvenile salmonids was modeled to address questions about capture rate and the timing of prey captures (random versus contagious). Prey density, predator weight, prey weight, temperature, and diel feeding pattern were first incorporated into predation equations analogous to Holling Type...
Prevalence of Renibacterium salmoninarum among downstream-migrating salmonids in the Columbia River
J. E. Sanders, J.J Long, C.K. Arakawa, J. L. Bartholomew, J. S. Rohovec
1992, Journal of Aquatic Animal Health (4) 72-75
Bacterial kidney disease (BKD) is an important contributor to mortality of salmonids in hatcheries in the Columbia River basin. However, the impact of BKD on the survival of downstream migrants is difficult to determine because there is little information on the disease-related mortality among these fish. In this study, the...
Small explosions interrupt 3-year quiescence at Mount St. Helens, Washington
B. Myers
1992, Earthquakes & Volcanoes (USGS) (23) 58-73
On December 11, 1989, geologists working in the crater at Mount St. Helens discovered two thin layers of ash separated by fresh snow-clear evidence that at least two small explosions had occurred recently. The explosions were neither seen nor heard, but on December 7 scientists suspected that a small ash-producing...
Mechanisms of iron photoreduction in a metal-rich, acidic stream (St. Kevin Gulch, Colorado, U.S.A.)
B. A. Kimball, Diane M. McKnight, G.A. Wetherbee, R.A. Harnish
1992, Chemical Geology (96) 227-239
Iron photoreduction in metal-rich, acidic streams affected by mine drainage accounts for some of the variability in metal chemistry of such streams, producing diel variations in Fe(II). Differentiation of the mechanisms of the Fe photoreduction reaction by a series of in-stream experiments at St. Kevin Gulch, Colorado, indicates that a...
Effects of acidic deposition on the erosion of carbonate stone - experimental results from the U.S. National Acid Precipitation Assessment Program (NAPAP)
P. A. Baedecker, M.M. Reddy, K.J. Reimann, C.A. Sciammarella
1992, Conference Paper, Atmospheric Environment - Part B Urban Atmosphere
One of the goals of NAPAP-sponsored research on the effects of acidic deposition on carbonate stone has been to quantify the incremental effects of wet and dry deposition of hydrogen ion, sulfur dioxide and nitrogen oxides on stone erosion. Test briquettes and slabs of freshly quarried Indiana limestone and Vermont...
A systematic approach to modelling the dynamic linkage of climate, physical catchment descriptors and hydrologic response components
A.J. Jakeman, G.M. Hornberger, I.G. Littlewood, P.G. Whitehead, J. W. Harvey, K.E. Bencala
1992, Mathematics and Computers in Simulation (33) 359-366
No abstract available....
Laser microprobe analyses of Cl, Br, I, and K in fluid inclusions: Implications for sources of salinity in some ancient hydrothermal fluids
J.K. Böhlke, J.J. Irwin
1992, Geochimica et Cosmochimica Acta (56) 203-225
The relative concentrations of Cl, Br, I, and K in fluid inclusions in hydrothermal minerals were measured by laser microprobe noble gas mass spectrometry on irradiated samples containing 10−10 to 10−8 L of fluid. Distinctive halogen signatures indicate contrasting sources of fluid salinity in fluid inclusions from representative “magmatic” (St....
Relationship between inferred redox potential of the depositional environment and geochemistry of the Upper Pennsylvanian (Missourian) Stark Shale Member of the Dennis Limestone, Wabaunsee County, Kansas, U.S.A.
J. R. Hatch, J.S. Leventhal
1992, Chemical Geology (99) 65-82
Analyses of 21 samples collected from a core of the 52.8-cm-thick Stark Shale Member of the Dennis Limestone in Wabaunsee County, Kansas, demonstrate four cycles with two-orders-of-magnitude variations in contents of Cd, Mo, P, V and Zn, and order-of-magnitude variations in contents of organic carbon, Cr, Ni, Se and U....
Age and nature of the basement in northeastern Washington and northern Idaho: isotopic evidence from Mesozoic and Cenozoic granitoids
M.J. Whitehouse, J. S. Stacey, F. K. Miller
1992, Journal of Geology (100) 691-701
K-feldspar Pb and whole rock Nd isotopic analyses from 25 Mesozoic and Cenozoic plutonic rocks and two gneisses from NE Washington and northern Idaho are used to elucidate the age and nature of the concealed cratonic basement. The plutons form two highly...
Moment-tensor solutions estimated using optimal filter theory: global seismicity, 1990
S.A. Sipkin, R.E. Needham
1992, Physics of the Earth and Planetary Interiors (70) 16-21
Moment-tensor solutions, estimated using optimal filter theory, are listed for 114 moderate-to-large size earthquakes occurring during 1990. ?? 1992....
Mid-Mesozoic (Mid-Jurassic to Early Cretaceous) evolution of the Georges Bank Basin, U.S. North Atlantic outer continental shelf: Sedimentology of the Conoco 145-1 well
L.J. Poppe, C. W. Poag, R.W. Stanton
1992, Sedimentary Geology (75) 171-192
The Conoco 145-1 exploratory well, located in the southeastern portion of the Georges Bank Basin, was drilled to a total depth of 4303 m below the sea floor. The oldest sedimentary rocks sampled are of Middle Jurassic age (Late Bathonian-Callovian). A dolomite-limestone-evaporite sequence dominates the section below 3917 m; limestone...
A hydrogen-oxidizing, Fe(III)-reducing microorganism from the Great Bay estuary, New Hampshire
F. Caccavo Jr., R.P. Blakemore, Derek R. Lovley
1992, Applied and Environmental Microbiology (58) 3211-3216
A dissimilatory Fe(III)- and Mn(IV)-reducing bacterium was isolated from bottom sediments of the Great Bay estuary, New Hampshire. The isolate was a facultatively anaerobic gram-negative rod which did not appear to fit into any previously described genus. It was temporarily designated strain BrY. BrY grew anaerobically in a defined medium...
Energy budgets and resistances to energy transport in sparsely vegetated rangeland
William D. Nichols
1992, Agricultural and Forest Meteorology (60) 221-247
Partitioning available energy between plants and bare soil in sparsely vegetated rangelands will allow hydrologists and others to gain a greater understanding of water use by native vegetation, especially phreatophytes. Standard methods of conducting energy budget studies result in measurements of latent and sensible heat fluxes above the plant canopy...
Tensiometers: Theory, construction, and use
D.I. Stannard
1992, Geotechnical Testing Journal (15) 48-58
Standard tensiometers are used to measure matric potential as low as −870 cm of water in the unsaturated zone by creating a saturated hydraulic link between the soil water and a pressure sensor. The direction and, in some cases, quantity of water flux can be determined using multiple installations.A variety...
Locating well sites in the Georgia Piedmont using a geographic information system
J.S. Clarke, K.W. McFadden
1992, Conference Paper, Proceedings of the National symposium on the future availability of ground water resources
Geochemical heterogeneity in a sand and gravel aquifer: Effect of sediment mineralogy and particle size on the sorption of chlorobenzenes
Larry B. Barber II, E. Michael Thurman, Donald D. Runnells
1992, Journal of Contaminant Hydrology (9) 35-54
The effect of particle size, mineralogy and sediment organic carbon (SOC) on sorption of tetrachlorobenzene and pentachlorobenzene was evaluated using batch-isotherm experiments on sediment particle-size and mineralogical fractions from a sand and gravel aquifer, Cape Cod, Massachusetts. Concentration of SOC and sorption of chlorobenzenes increase with decreasing particle size. For...
