Dynamics of Mojave Desert shrub assemblages in the Panamint Mountains, California.
Robert Webb, John W. Steiger, Raymond M. Turner
1987, Ecology (68) 478-490
We studied shrub communities in the Panamint Mountains of the Mojave Desert to determine whether vegetational changes after disturbance can be characterized as succession according to modern successional theory. We found, on a variety of disturbed and undisturbed sites, that the rate of change was a function of the type...
Transmission of infectious pancreatic necrosis virus in striped bass, Morone saxatilis (Walbaum)
S.J. Wechsler, L.C. Woods, J.N. Kraeuter, F. M. Hetrick, P. E. McAllister
1987, Journal of Fish Diseases (10) 29-34
Infectious pancreatic necrosis virus (IPNV) did not cause increased mortality in experimentally challenged striped bass, Morone saxatilis (Walbaum). Fry became transiently infected after waterborne challenge but fingerlings were resistant to that route. However, striped bass fingerlings readily became chronic virus carriers following ingestion of IPNV-contaminated food. Vertical...
Isotopic composition of pyrite: Relationship to organic matter type and iron availability in some North American cretaceous shales
D. L. Gautier
1987, Chemical Geology: Isotope Geoscience Section (65) 293-303
The S isotope composition of pyrite in Cretaceous shales from the Western Interior of North America is related to organic C abundance, kerogen type and Fe availability. Both calcareous and noncalcareous rocks show a correlation between S and C, but noncalcareous...
Interactions among dietary minerals, arginine and lysine in rainbow trout (Salmo gairdneri)
Y. N. Chiu, R. E. Austic, G. L. Rumsey
1987, Fish Physiology and Biochemistry (4) 45-55
Studies were conducted to determine whether interactions occur among dietary lysine, arginine and monovalent minerals in rainbow trout. In one experiment, rainbow trout fingerlings were fed diets containing three levels of lysine (2.4, 3.1 and 3.8 g per 100 g diet), two levels of arginine (1.7 and 2.5 g per...
The mobilization of aluminum in a natural soil system: Effects of hydrologic pathways
Isabelle M. Cozzarelli, Janet S. Herman, Roderic A. Parnell Jr.
1987, Water Resources Research (23) 859-874
A two-component soil water flow model was used in conjunction with an equilibrium speciation model WATEQF to study aluminum mobility in soils of a forested watershed, White Oak Run, in the Shenandoah National Park, Virginia. Soil solution samples, taken from the O, E, B, C1, and C2horizons, were collected from...
Modes of development of slope canyons and their relation to channel and levee features on the Ebro sediment apron, off-shore northeastern Spain
S. O'Connell, William B. F. Ryan, W. R. Normark
1987, Marine and Petroleum Geology (4)
Six submarine slope canyons in an area of the northwestern Mediterranean, offshore from the Ebro River and Delta, were surveyed with bathymetric swathmapping (SeaBeam) and mid-range side-looking sonar (SeaMARC I). All of the canyons have slightly winding paths with concave-upwards gradients that are relatively steep shallower than 1,200 m. Two...
The crustal structure of the axis of the Great Valley, California, from seismic refraction measurements
W.S. Holbrook, Walter D. Mooney
1987, Tectonophysics (140) 49-63
In 1982 the U.S. Geological Survey collected six seismic refraction profiles in the Great Valley of California: three axial profiles with a maximum shot-to-receiver offset of 160 km, and three shorter profiles perpendicular to the valley axis. This paper presents the results of two-dimensional raytracing and synthetic seismogram modeling of...
Estimating threshold values for the land disposal of organic solvent-contaminated wastes
William R. Roy, R. A. Griffin
1987, Journal of Hazardous Materials (15) 365-376
This paper describes conceptual and mathematical modeling approaches to evaluate environmentally suitable waste management practices that prevent ground water pollution from landfill disposal of solid wastes contaminated with organic solvents. Threshold values for disposal of solid wastes contaminated with acetone, nitrobenzene, chlorobenzene, and carbon tetrachloride were estimated using a disposal...
Immunization of salmonids against Yersinia ruckeri: Significance of humoral immunity and cross protection between serotypes
R. C. Cipriano, T. Ruppenthal
1987, Journal of Wildlife Diseases (23) 545-550
Brook trout (Salvelinus fontinalis) were immunized with bacterins containing either Serotype 1 or 2 isolates of Yersinia ruckeri to determine the relative degree of cross-protection afforded when the fish were challenged with the homologous or heterologous serotype. While fish immunized with pH-lysed bacterins produced highly...
Volcanism and massive sulfide formation at a sedimented spreading center, Escanaba Trough, Gorda Ridge, northeast Pacific
J. L. Morton, M.L. Holmes, R.A. Koski
1987, Geophysical Research Letters (14) 769-772
Seismic-reflection profiles over the sediment-filled Escanaba Trough at the southern Gorda Ridge reveal a series of volcanic centers that pierce the sediment. The volcanic edifices are 3 to 6 km in diameter and are spaced at 15 to 20 km intervals along the axis of the...
Reassessment of the volkonskoite-chromian smectite nomenclature problem.
Eugene E. Foord, Harry C. Starkey, Joseph E. Taggart Jr., Daniel R. Shawe
1987, Clays and Clay Minerals (35) 139-149
The name volkonskoite was first used in 1830 to describe a bright blue-green, chromium-bearing clay material from the Okhansk region, west of the Ural Mountains, U.S.S.R. Since that time, the name has been applied to numerous members of the smectite group of clay minerals, although the reported chromium content has...
Mineralogical basis for the interpretation of multi-element (ICP-AES), oxalic acid, and aqua regia partial digestions of stream sediments for reconnaissance exploration geochemistry
S. E. Church, E. L. Mosier, J. M. Motooka
1987, Journal of Geochemical Exploration (29) 207-233
We have applied partial digestion procedures, primarily oxalic acid and aqua regia leaches, to several regional geochemical reconnaissance studies carried out using Inductively Coupled Plasma-Atomic Emission Spectroscopy (ICP-AES) analytical methods. We have chosen to use these two acids because the oxalic...
Inheritance of duplicated fumarase and phosphoglucomutase loci in lake trout (Salvelinus namaycush)
J.E. Marsden, C.C. Krueger, H. L. Kincaid, B. May
1987, Heredity (58) 365-372
Two polymorphic, duplicated loci (fumarase-1,2 and phosphoglucomutase-3,4), previously undescribed in salmonids, were examined in lake trout to determine their electrophoretic expression, mode of inheritance, and linkage associations. Both loci appear to be located on chromosomes which show residual tetrasomy. Neither locus pair shows joint segregation with other loci examined or...
Pressure-composition relations for coexisting gases and liquids and the critical points in the system NaCl-H2O at 450, 475, and 500°C
Robert J. Rosenbauer, James L. Bischoff
1987, Geochimica et Cosmochimica Acta (51) 2349-2354
Pressure-temperature-composition (P, T, x) relations for the co-existing vapor and liquid phases in the system NaCl-H2O were determined experimentally at 450, 475, and 500°C. Data for each isotherm includeP-x relations near the critical point and extend to the three-phase assemblage vapor-liquid-halite on the vapor side. On the liquid side the P-x data range from the...
Magmatic history of Red Sea rifting: Perspective from the central Saudi Arabian coastal plain
J.S. Pallister
1987, Geological Society of America Bulletin (98) 400-417
A newly recognized Tertiary dike complex and comagmatic volcanic rocks exposed on the central Saudi Arabian coastal plain record early stages of magmatism related to Red Sea rifting. Intrusive and stratigraphic relationships and new potassium-argon dating indicate episodic magmatism from about 30 Ma to the present. Additional stratigraphic and radiometric...
Geological hazards: programs and research in the USA
J.R. Filson
1987, Episodes (10) 292-295
Geological hazards have been studied for centuries, but government support of research to lessen their effects is relatively new. This article briefly describes government programs and research under way in the U.S.A. that are directed towards reducing losses of life and property from earthquakes, volcanic eruptions and landslides. -Author...
Diagenetic palaeotemperatures from aqueous fluid inclusions: re-equilibration of inclusions in carbonate cements by burial heating
R.C. Burruss
1987, Mineralogical Magazine (51) 477-481
Diagenetic palaeotemperatures determined from aqueous fluid inclusions can be affected by re-equilibration during burial heating. Calculations based on the observed behaviour of inclusions in fluorite under external confining pressure allows prediction of the temperatures and depths of burial necessary to initiate re-equilibration of aqueous inclusions in the common size range...
PYROLYSIS/GAS CHROMATOGRAPHY/MASS SPECTROMETRY OF A SERIES OF BURIED WOODS AND COALIFIED LOGS THAT INCREASE IN RANK FROM PEAT TO SUBBITUMINOUS COAL.
Patrick G. Hatcher, Harry E. Lerch, Rama K. Kotra, Vincent T. Verheyen
1987, Conference Paper, ACS Division of Fuel Chemistry, Preprints
To better understand the coalification process, we have conducted numerous studies of the chemical structural composition of xylem tissue from gymosperm wood and related woods that has been coalified to varying degrees. The studies presented here, examine the chemical nature of buried and coalified xylem tissue at the molecular level....
Decomposition rates of peat in drained and undrained wetlands
J.M. Friedman
K. Mutz, editor(s)
1987, Conference Paper, Proceedings of the Eighth Annual Meeting of the Society of Wetland Scientists
No abstract available....
Variable delay miniservo-control unit
M.A. Uhrich
1987, WRD Instrument News
No abstract available. ...
Seismicity map of the state of Florida
B. Glen Reagor, Carl W. Stover, Sylvester Theodore Algermissen
1987, Miscellaneous Field Studies Map 1056
This map is one of a series of seismicity maps produced by the U. S. Geological Survey that show earthquake data of individual states or groups of states at the scale of 1:1,000,000. This map shows only those earthquakes with epicenters located within the boundaries of Florida, even though earthquakes...
Geochemical evolution of waters within the north coast limestone aquifers of Puerto Rico: A conceptualization based on a flow path in the Barceloneta area
A. J. Roman-Mas, R. W. Lee
1987, Water-Resources Investigations Report 86-4080
Water samples along a groundwater flow path in the Barceloneta area, Puerto Rico, were collected from wells screened in the Montebello Limestone Member of the Cibao Formation (artesian aquifer) and in the overlying Aguada and Aymamon Limestones (water table aquifer). The groundwater chemistry changes as water migrates from recharge areas...
You asked for it! Sodium bicarbonate: properties and reports of its use in fish production
B.R. Griffin, C.M. Collins
1987, Aquaculture Magazine (13) 53-54
Prey preference and seasonal predation by oystercatchers on limpets at San Nicolas Island, California, USA
D. R. Lindberg, K.I. Warheit, J. A. Estes
1987, Marine Ecology Progress Series (39) 105-113
You asked for it! Using liquid oxygen for increasing channel catfish production in concrete raceways
C. Collins
1987, Aquaculture Magazine (13) 50-52
