Iron photoreduction and oxidation in an acidic mountain stream
D.M. McKnight, B. A. Kimball, K.E. Bencala
1988, Science (240) 637-640
In a small mountain stream in Colorado that receives acidic mine drainage, photoreduction of ferric iron results in a well-defined increase in dissolved ferrous iron during the day. To quantify this process, an instream injection of a conservative tracer was used to measure discharge at the time that each sample...
Guild structure of a riparian avifauna relative to seasonal cattle grazing
Fritz L. Knopf, James A. Sedgwick, Richard W. Cannon
1988, Journal of Wildlife Management (52) 280-290
The avifauna within the willow (Salix spp.) community on the Arapaho National Wildlife Refuge (NWR) was dominated (96% of all observations each year) by 11 species of passerine birds during the summers of 1980-81. Using 28 vegetation variables measured or calculated for randomly selected points and points where birds were...
Vertical seismic profiling of Oroville microearthquakes: Velocity spectra and particle motion as a function of depth
P. E. Malin, J. A. Waller, Roger D. Borcherdt, E. Cranswick, Edward G. Jensen, J. Van Schaak
1988, Bulletin of the Seismological Society of America (78) 401-420
Direct evidence of site distortion of P- and S-wave microearthquake source spectra at Oroville, California, is presented. The data were gathered by placing vertical and three-component seismometers at 90 m intervals in a 500 m borehole through the Cleveland Hill normal fault, on which the 1975, ML = 5.7 Oroville earthquake took place. High-pressure,...
Environmental contaminants in California condors
Stanley N. Wiemeyer, J. Michael Scott, Marilyn P. Anderson, Peter H. Bloom, Charles J. Stafford
1988, Journal of Wildlife Management (52) 238-247
Five wild California condors (Gymnogyps californianus) that died in 1980-86 were necropsied and tissues were analyzed for environmental contaminants. Three died of lead (Pb) poisoning, 1 presumably of cyanide (CN) poisoning, and 1 nestling of handling shock. Organochlorine concentrations were low in 4 condors that were analyzed for these contaminants....
Survival of juvenile ring-necked ducks on wetlands of different pH
Daniel G. McAuley, Jerry R. Longcore
1988, Journal of Wildlife Management (52) 169-176
Brood and duckling survival of ring-necked ducks (Aythya collaris) was examined in relation to wetland water chemistry in eastcentral Maine during 1983-85. Daily survival rates (DSR) of broods and ducklings were determined for 381 ducklings from 64 broods by counts of each brood at 6-10-day intervals during broodrearing. Twelve of...
Internal inconsistencies in dispersion-dominated models that incorporate chemical and microbial kinetics
Fred J. Molz, Mark A. Widdowson
1988, Water Resources Research (24) 615-619
Current understanding of transport processes in aquifers is limited by lack of precise point chemical concentration measurements. Recently, however, some careful measurements of vertical chemical concentration profiles have been made at several locations around the world that appear to support a consistent picture concerning the persistence of large vertical concentration...
Nonhunting mortality in sandhill cranes
Ronald M. Windingstad
1988, Journal of Wildlife Management (52) 260-263
Records of 170 sandhill cranes (Grus canadensis) necropsied at the National Wildlife Health Research Center, Wisconsin, from 1976 through 1985 were reviewed as representative samples to determine causes of nonhunting mortality in the mid-continent and Rocky Mountain populations of sandhill cranes. Avian cholera, avian botulism, and ingestion of mycotoxins were...
A field test for differences in condition among trapped and shot mallards
Kenneth J. Reinecke, Charles W. Shaiffer
1988, Journal of Wildlife Management (52) 227-232
We tested predictions from the condition bias hypothesis (Weatherland and Greenwood 1981) regarding the effects of sampling methods of body weights of mallards (Anas platyrhynchos) at White River National Wildlife Refuge (WRNWR), Arkansas, during 24 November-8 December 1985. Body weights of 84 mallards caught with unbaited rocket nets in a...
Foods of juvenile ring-necked ducks: Relationship to wetland pH
Daniel G. McAuley, Jerry R. Longcore
1988, Journal of Wildlife Management (52) 177-185
Foods of 37 juvenile ring-necked ducks (Aythya collaris) from 16 different wetlands were examined in eastcentral Maine in 1983-85. Invertebrates made up 70% aggregate dry weight (100% occurrence) of the foods of Class Ia-IIa (≤ 24 days old) ducklings and 32% (86% occurrence) of Class IIb-III (≥ 25 days old)...
The effects of hunting on survival rates of American black ducks
David G. Krementz, Michael J. Conroy, James E. Hines, H. Frankin Percival
1988, Journal of Wildlife Management (52) 214-226
Using data from 10 preseason and 10 winter major reference areas from 1950-83, the authors tested hypotheses regarding the effects of hunting on the survival and recovery rates of the American black duck (Anas rubripes). Although estimates of the proportion of total annual mortality due to hunting are low (35%...
Physiography of the western United States Exclusive Economic Zone
D.A. Cacchione, D.E. Drake, Brian D. Edwards, M. E. Field, J. V. Gardner, M. A. Hampton, H. A. Karl, N.H. Kenyon, D.G. Masson, David S. McCulloch
1988, Geology (16) 131-134
GLORIA (Geologic Long-Range Inclined Asdic) sidescan sonar images were collected over the entire Exclusive Economic Zone (EEZ) west of the conterminous United States. The continuous, overlapping, swath-mapping technique provides, for the first time, a reconnaissance plan view off the entire sea floor from the edge of the continental shelf to...
Gas bubbles in fossil amber as possible indicators of the major gas composition of ancient air
R.A. Berner, Gary P. Landis
1988, Science (239) 1406-1409
Gases trapped in Miocene to Upper Cretaceous amber were released by gently crushing the amber under vacuum and were analyzed by quadrupole mass spectrometry. After discounting the possibility that the major gases N2, O2, and CO2 underwent appreciable diffusion and diagenetic exchange with their surroundings or reaction with the amber, it...
The 1987 Whittier Narrows earthquake in the Los Angeles metropolitan area, California
E. Hauksson, Lucile M. Jones, T.L. Davis, L.K. Hutton, Pat Williams, Allison L. Bent, A. Gerald Brady, Paul A. Reasenberg, A.J. Michael, R. F. Yerkes, E. Etheredge, R. L. Porcella, M.J.S. Johnston, G. Reagor, C. G. Bufe, E. Cranswick, A.K. Shakal
1988, Science (239) 1409-1412
The Whittier Narrows earthquake sequence (local magnitude, ML = 5.9), which caused over 358-million dollars damage, indicates that assessments of earthquake hazards in the Los Angeles metropolitan area may be underestimated. The sequence ruptured a previously unidentified thrust fault that may be part of a large system of thrust faults that extends...
Uranium-series dating of the Mousterian occupation at Abric Romani, Spain
J. L. Bischoff, R. Julia, R. Mora
1988, Nature (332) 68-70
The precise evolutionary position of the Neanderthal people continues to be a major uncertainty in human evolution. Their origin and their relationship to anatomically modern people are unclear and are clouded by poor chronology. Lithic artefacts of the Mousterian type, found throughout Europe and the Mediterranean Basin, are believed to...
Use of electrothermal vaporization-multiple-wavelength absorption spectrometry to qualitatively screen for the presence of polycyclic aromatic hydrocarbons
Joseph M. Shekiro, Rodney K. Skogerboe, Howard E. Taylor
1988, Environmental Science & Technology (22) 338-344
No abstract available...
Variations in abundance of young-of-the-year channel catfish in a navigation pool of the upper Mississippi River
L. E. Holland Bartels, M.C. Duval
1988, Transactions of the American Fisheries Society (117) 202-208
Spatial and temporal variations in the abundance of young‐of‐the‐year channel catfish Ictalurus punctatus were determined over 3 years based on 154 trawls taken from Navigation Pool 7 of the upper Mississippi River. No significant spatial patterns in abundance or length offish in the catch were found in seven poolwide...
Cooperative federal-state liming research on surface waters impacted by acidic deposition
R.K. Schreiber
1988, Water, Air, & Soil Pollution (41) 53-73
In the eastern and north-central United States, lakes and streams with low acid neutralizing capacity are at risk from acidity. Resource management agencies are interested in developing mitigation strategies that protect or restore fisheries in these waters. Addition of limestone (calcium carbonate) to improve water quality...
Amino-acid diagenesis and its implication for late Pleistocene lacustrine sediment, Clear Lake, California
D.J. Blunt, Keith A. Kvenvolden
1988, GSA Special Papers (214) 161-170
The diagenesis of amino acids in sediments from Clear Lake core CL-80-1 is indicated by changes in amino acid concentrations, compositions, and stereochemistry. Concentrations of total amino acids decrease with depth, but the decrease is not systematic, possibly reflecting a nonuniformity in sedimentary and postdepositional processes affecting the amino acids....
Hawaii Volcano Observatory 75th anniversary
Thomas L. Wright, Robert W. Decker
1988, Earthquakes & Volcanoes (USGS) (20) 31-35
The 75th anniversary of the founding of the U.S. Geological Survey (USGS) Hawaiian Volcano Observatory (HVO) was celebrated in January 1987. The festivities began on January 9 with the opening in Hilo of a major exhibit at the Wailoa Center on the current work of HVO, its history, and its...
Seismic design and engineering research at the U.S. Geological Survey
1988, Earthquakes & Volcanoes (USGS) (20) 219-223
The Engineering Seismology Element of the USGS Earthquake Hazards Reduction Program is responsible for the coordination and operation of the National Strong Motion Network to collect, process, and disseminate earthquake strong-motion data; and, the development of improved methodologies to estimate and predict earthquake ground motion. Instrumental observations of strong ground...
NCIC state affiliates
Water Resources Division, U.S. Geological Survey
1988, Report
In 1974, the U.S. Geological Survey, Department of the Interior, established the National Cartographic Information Center (NCIC) to serve as the public's primary source for information concerning the availability of cartographic, geographic,and remotely sensed data. As part of its program of providing information to the public, NCIC began in 1976...
The Fox permafrost tunnel: A late Quaternary geologic record in central Alaska
T. D. Hamilton, J. Craig, P.V. Spellmann
1988, GSA Bulletin (100) 948-969
The Fox permafrost tunnel, which penetrates 110 m into frozen sediments of Gold-stream valley, provides a continuous exposure of fossiliferous silt and alluvium above schistose bedrock. Deposition of fluvial gravel was followed by a long interval of loess accretion and permafrost aggradation that was punctuated by episodes of thaw and...
Stratigraphic evidence of Holocene faulting in the mid-continent: The Meers fault, southwestern Oklahoma
Richard F. Madole
1988, GSA Bulletin (100) 392-401
Stratigraphic relations and ten 14C ages show that movement occurred on the Meers fault in late Holocene time. Movement on the fault postdates the Browns Creek Alluvium, which began to be deposited between 14,000 and 13,000 yr B.P., and predates the East Cache Alluvium, which was deposited between 800 and 100...
Voluminous submarine lava flows from Hawaiian volcanoes
Robin T. Holcomb, James G. Moore, Peter W. Lipman, R.H. Belderson
1988, Geology (16) 400-404
The GLORIA long-range sonar imaging system has revealed fields of large lava flows in the Hawaiian Trough east and south of Hawaii in water as deep as 5.5 km. Flows in the most extensive field (110 km long) have erupted from the deep submarine segment of Kilauea's east rift zone....
Large-scale bedforms in boulder gravel produced by giant waves in Hawaii
G. W. Moore, James G. Moore
1988, GSA Special Papers (229) 101-110
Approximately 105,000 yr ago (based on uranium-series dating), waves in a giant wave train swept up to an elevation of about 375 m on the island of Lanai. The waves deposited the Hulopoe Gravel, which near the present shoreline consists of basalt boulders, coral fragments, and calcareous beachrock slabs, and...
