Remarkable invasion of San Francisco Bay (California, USA) by the Asian clam Potamocorbula amurensis. II. Displacement of a former community
Frederic H. Nichols, Janet K. Thompson, Laurence E. Schemel
1990, Marine Ecology Progress Series (66) 95-101
Long-term macrobenthic sampling at a site in northern San Francisco Bay has provided an unusual opportunity for documenting the time course of an invasion by a recently introduced Asian clam Potamocorbula arnurensis. Between 1977, when sampling began, and 1986, when the new clam was first discovered, the benthic community varied...
An expert system for prediction of aquatic toxicity of contaminants
James P. Hickey, Andrew J. Aldridge, Dora R. May Passino, Anthony M. Frank
Judith M. Hushon, editor(s)
1990, Book chapter, Expert systems for environmental applications
The National Fisheries Research Center-Great Lakes has developed an interactive computer program in muLISP that runs on an IBM-compatible microcomputer and uses a linear solvation energy relationship (LSER) to predict acute toxicity to four representative aquatic species from the detailed structure of an organic molecule. Using the SMILES formalism for...
Producing ducks using wire and electricity
J. T. Lokemoen
1990, South Carolina Waterfowl and Wetlands (4) 8-9
Abstract has not been submitted...
Preliminary geologic [map] and section of part of the Canador Peak 15' quadrangle, Grant and Hidalgo Counties, New Mexico
David Carl Hedlund, Tommy L. Finnell
1990, Open-File Report 90-505
No abstract available....
Distribution of annual fishes (Pisces-Rivulidae) in the Rio Unare basin, Venezuela
J.E. Thomerson, D.C. Taphorn, L.G. Nico
1990, BioLlania (7) 33-38
Abstract not supplied at this time...
Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use
T. J. O'Shea, H. I. Kochman
1990, Florida Marine Research Publications (49) 1-57
Abstract not supplied at this time...
Assessing the visual quality of small islands and shoals in the Thousand Islands Region
M. G. Knutson, D.J. Leopold, R.C. Smardon
J. Kusler, R. Smardon, editor(s)
1990, Book chapter, Wetlands of the Great Lakes: protection and restoration policies; status of the science
Abstract not submitted to date...
Mass-marking of otoliths of lake trout sac fry by temperature manipulation
R.A. Bergstedt, R.L. Eshenroder, C. Bowen, J.G. Seelye, J.C. Locke
N. C. Parker, A.E. Giorgi, R.C. Heidenger, D. B. Jester Jr., E.D. Prince, G.A. Winans, editor(s)
1990, Book chapter, Fish-marking techniques
The otoliths of 676,000 sac fry of lake trout Salvelinus namaycush in 1986, and of 1,100,000 in 1987, were marked by daily manipulation of water temperature. The fish were stocked into Lake Huron in the spring. Otolith marks consisted of groups of daily growth rings accentuated into recognizable patterns...
Effects of visiting black brant nests on egg and nest survival
James S. Sedinger
1990, Journal of Wildlife Management (54) 437-443
I used 2 methods to evaluate the effect of visiting black brant (Branta bernicla nigricans) nests on survival of whole nests and eggs in a single colony on the Yukon-Kuskokwim Delta, Alaska. The first technique regressed survival of nests or eggs during a time interval against interval length. Departure of...
Effects of neck bands on the behavior of wintering greater white-fronted geese
Craig R. Ely
1990, Journal of Field Ornithology (61) 249-253
Activity budgets of adult Greater White-fronted Geese (Anser albifrons frontalis) with and without neck bands during the non-breeding season revealed that geese with neck bands spent more time preening than geese without neck bands while at foraging sites, but not while at roosting sites. Neck-banded and control geese spent equal...
Tracking wildlife by satellite: Current systems and performance
Richard B. Harris, Steven G. Fancy, David C. Douglas, Gerald W. Garner, Steven C. Amstrup, Thomas R. McCabe, Larry F. Pank
1990, Fish and Wildlife Technical Report 30
Since 1984, the U.S. Fish and Wildlife Service has used the Argos Data Collection and Location System (DCLS) and Tiros-N series satellites to monitor movements and activities of 10 species of large mammals in Alaska and the Rocky Mountain region. Reliability of the entire system was generally high. Data were...
Where to send samples for analysis
R. A. Schnick
Fred P. Meyer, Lee A. Barclay, editor(s)
1990, Resource Publication 177-8
No abstract available....
Climatic change and permafrost. Record from surficial deposits
L. David Carter
1990, Journal of Cold Regions Engineering (4) 43-53
The physical and chemical characteristics of surficial deposits and the floral and faunal remains they contain provide information that is useful for interpreting both paleoclimate and past permafrost conditions. Surficial deposits thus provide a record of climatic change and permafrost history. This record suggests that initiation of permafrost in lowland...
Geologic map and geothermal assessment of the Mount Adams volcanic field, Cascade Range of southern Washington
Wes Hildreth, Judy Fierstein
1990, Conference Paper, Transactions - Geothermal Resources Council
More than 60 Quaternary vents make up the basalt-to-rhyodacite Mount Adams volcanic field and have erupted scoriae and lavas with a total volume of >370 km3. The Mount Adams andesite-dacite stratocone itself is a compound edifice that includes the high cone above 2300 m (20-10 ka), remnants of at least...
Radium distribution and indoor radon in the Pacific Northwest
J. S. Duval, J. K. Otton
1990, Geophysical Research Letters (17) 801-804
Aerial gamma-ray data were compiled to produce a map showing the distribution of radium (226Ra) in near-surface materials in the Pacific Northwest (Washington, Oregon, and Idaho, and parts of Montana, Wyoming, California, Nevada, and Utah). A comparison of measurements of indoor concentration levels of radon (222Rn)...
Map of mean annual runoff for the Northeastern, Southeastern, and Mid-Atlantic United States, water years 1951-80
William R. Krug, Warren A. Gebert, David J. Graczyk, Donald L. Stevens Jr., Barry P. Rochelle, M. Robbins Church
1990, Water-Resources Investigations Report 88-4094
A map of mean annual runoff for States within the Northeastern, Southeastern, and Mid-Atlantic United States was prepared by the U.S. Geological Survey for the Direct/Delayed Response Project being conducted by the U.S. Environmental Protection Agency. This map shows mean annual runoff during water years 1951-80. Mean annual runoff from the...
Geometry of the September 1971 eruptive fissure at Kilauea volcano, Hawaii
J.J. Dvorak
1990, Bulletin of Volcanology (52) 507-514
A three-dimensional model has been used to estimate the location and dimensions of the eruptive fissure for the 24-29 September 1971 eruption along the southwest rift zone of Kilauea volcano, Hawaii. The model is an inclined rectangular sheet embedded in an elastic half-space with constant displacement on the plane of...
Variations of electric resistance and H2 and Rn emissions of concrete blocks under increasing uniaxial compression
C.-Y. King, G. Luo
1990, Pure and Applied Geophysics PAGEOPH (134) 45-56
Electric resistance and emissions of hydrogen and radon isotopes of concrete (which is somewhat similar to fault-zone materials) under increasing uniaxial compression were continuously monitored to check whether they show any pre- and post-failure changes that may correspond to similar changes reported for earthquakes. The results show that all these...
Magmatic unrest at Long Valley Caldera, California, 1980-1990
R. A. Bailey, D.P. Hill
1990, Geoscience Canada (17) 175-179
On May 25, 1980, the resort town of Mammoth Lakes, California, was shaken by a remarkable 48-hour-long earthquake sequence that included four M=6, two M=5 and 300 M=3 quakes. The nature of the precursory seismicity plus the unusual character of the May 25-27 sequence itself suggested that it was not...
Origin of carbonate deposits in the vicinity of Yucca Mountain, Nevada. Preliminary results of strontium-isotope analyses
B.D. Marshall, K. Futa, S. A. Mahan, Z. E. Peterman, J. S. Stuckless, J. S. Downey, E. D. Gutentag
1990, Conference Paper
As part of the paleohydrology study of the Yucca Mountain Project, strontium-isotope analyses of carbonate deposits, ground water, and major rock reservoirs of strontium are in progress. This paper presents a summary of the strontium-isotope data obtained through 1989. Calcium carbonate is ubiquitous in the vicinity of Yucca Mountain, where...
Fluid-inclusion technique for determining maximum temperature in calcite and its comparison to the vitrinite reflectance geothermometer
C.E. Barker, R.H. Goldstein
1990, Geology (18) 1003-1006
Theory, laboratory experiments, and empirical observation suggest that many aqueous fluid inclusions in calcite reequilibrate during overheating, and therefore some homogenization temperatures (Th) record a temperature close to the maximum reached by the rock. This characteristic suggests that aqueous fluid inclusions in calcite can be used to establish maximum temperature...
Adaptive box filters for removal of random noise from digital images
E. M. Eliason, A. S. McEwen
1990, Photogrammetric Engineering and Remote Sensing (56) 453-458
We have developed adaptive box-filtering algorithms to (1) remove random bit errors (pixel values with no relation to the image scene) and (2) smooth noisy data (pixels related to the image scene but with an additive or multiplicative component of noise). For both procedures, we use the standard deviation (??)...
Geochemistry of reduced gas related to serpentinization of the Zambales ophiolite, Philippines
T.A. Abrajano, N.C. Sturchio, B. M. Kennedy, G.L. Lyon, K. Muehlenbachs, J.K. Böhlke
1990, Applied Geochemistry (5) 625-630
Methane-hydrogen gas seeps with mantle-like C and noble gas isotopic characteristics issue from partially serpentinized ultramafic rocks in the Zambales ophiolite, Philippines. New measurements of noble gas and 14C isotope abundances, rock/mixed-volatile equilibrium calculations, and previous chemical and isotopic data suggest that these reduced gases are products of periodotite hydration....
Equivalent strike-slip earthquake cycles in half-space and lithosphere-asthenosphere earth models
J.C. Savage
1990, Journal of Geophysical Research (95) 4873-4879
By virtue of the images used in the dislocation solution, the deformation at the free surface produced throughout the earthquake cycle by slippage on a long strike-slip fault in an Earth model consisting of an elastic plate (lithosphere) overlying a viscoelastic half-space (asthenosphere) can be duplicated by prescribed slip on...
Sediment-induced amplification and the collapse of the Nimitz Freeway
S. E. Hough, P.A. Friberg, R. Busby, E.F. Field, K.H. Jacob, R. D. Borcherdt
1990, Nature (344) 853-855
The amplification of ground motion by low-seismic-velocity surface sediments is an important factor in determining the seismic hazard specific to a given site. The Ms = 7.1 Loma Prieta earthquake of 17 October 1989 was the largest event in the contiguous United States in 37 years, and yielded an unparalleled volume of...
