The adaptive radiation of photosynthetic modes in the genus Isoetes (Isoetaceae)
Jon E. Keeley
R.M.M. Crawford, editor(s)
1987, Book chapter, Plant Life in Aquatic and Amphibious Habitats.
No abstract available at this time...
Seismicity map of the state of Pennsylvania
C. W. Stover, B.G. Reagor, S. T. Algermissen
1987, Miscellaneous Field Studies Map 1280
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 Pennsylvania, even though earthquakes...
Horizontal ichthyoplankton tow-net system with unobstructed net opening
Robert T. Nester
1987, North American Journal of Fisheries Management (7) 148-150
The larval fish sampler described here consists of a modified bridle, frame, and net system with an obstruction-free net opening and is small enough for use on boats 10 m or less in length. The tow net features a square net frame attached to a 0.5-m-diameter cylinder-on-cone plankton net...
Prey fish dynamics and salmonine predator growth in Lake Ontario, 1978-84
Robert O’Gorman, Roger A. Bergstedt, Thomas H. Eckert
1987, Canadian Journal of Fisheries and Aquatic Sciences (44) 390-403
The size of hatchery-reared brown trout (Salmo trutta) and coho salmon (Oncorhynchus kisutch), 1 yr after release in Lake Ontario, declined when the stocking of salmonines was increased between 1978 and 1984. The principal prey species, alewife (Alosa pseudoharengus) and rainbow smelt (Osmerus mordax), failed to show the expected, predator-induced downturn...
Predicting Great Lakes fish yields: tools and constraints
C.A. Lewis, D.H. Schupp, W.W. Taylor, J.J. Collins, Richard W. Hatch
1987, Canadian Journal of Fisheries and Aquatic Sciences (44) 411-416
Prediction of yield is a critical component of fisheries management. The development of sound yield prediction methodology and the application of the results of yield prediction are central to the evolution of strategies to achieve stated goals for Great Lakes fisheries and to the measurement of progress toward those goals....
Implications of the northwestwardly younger age of the volcanic rocks of west-central California: Alternative Interpretation
Richard G. Stanley
1987, GSA Bulletin (98) 612-614
Fox and others (1985) have made an important contribution to our understanding of iihe evolution of the Mendocino triple junction and the San Andreas transform. They have summarized a large amount of data on the ages and distribution of volcanic centers along the central California coast; their summary clearly shows...
A model of the productivity of the mallard duck
Douglas H. Johnson, Donald W. Sparling, Lewis M. Cowardin
1987, Ecological Modelling (38) 257-275
This paper describes a stochastic computer model that simulates recruitment of the mallard (Anas platyrhynchos) under different habitat conditions and management scenarios. The model incorporates several environmental phenomena and biological relations that affect mallard recruitment. Major events include arrival of mallards in the spring, daily survival of hens, initiation of...
Langrangian model of nitrogen kinetics in the Chattahoochee River
H.E. Jobson
1987, Journal of Environmental Engineering (113) 223-242
A Lagrangian reference frame is used to solve the convection‐dispersion equation and interpret water‐quality data obtained from the Chattahoochee River. The model was calibrated using unsteady concentrations of organic nitrogen, ammonia, and nitrite plus nitrate obtained during June 1977 and verified using data obtained during August 1976. Reaction kinetics of...
Generation of liquid water on Mars through the melting of a dusty snowpack
G.D. Clow
1987, Icarus (72) 95-127
The possibility that snowmelt could have provided liquid water for valley network formation early in the history of Mars is investigated using an optical-thermal model developed for dusty snowpacks at temperate latitudes. The heating of the postulated snow is assumed to...
Earthquakes, May-June 1987
W. J. Person
1987, Earthquakes & Volcanoes (USGS) (19) 110-112
There were no major earthquakes (7.0-7.9) during this reporting period but earthquake related deaths were reported in Italy, Iran, and the Philippine Islands. In the United States a moderate earthquake occurred in southern Illinois and caused some damage. ...
EMBANKMENT-DAM BREACH PARAMETERS.
David C. Froehlich
1987, Conference Paper
The study used data from 43 embankment-dam failures to develop equations that predict breach formation model parameters. These data include the failure mode, embankment characteristics, reservoir conditions at the time of failure, geometry of the final breach, and the time taken to form the breach. Regression equations were developed to...
Crescentic dunes on the inner continental shelf off northern California
D.A. Cacchione, M.E. Field, D.E. Drake, G. B. Tate
1987, Geology (15) 1134-1137
Large crescentic dunes that resemble barchans have been discovered within elongate scour depressions on the northern California inner continental shelf by using side-scan sonar. These dunes appear to be migrating obliquely to the regional shelf gradient; a preferred offshore direction of transport is...
APPALACHIAN FOLDS, LATERAL RAMPS, AND BASEMENT FAULTS: A MODERN ENGINEERING PROBLEM?
Howard A. Pohn
1987, Transportation Research Record 132-133
Field studies and analysis of radar data have shown that cross-strike faulting in the central and southern Appalachians has affected geologic structures at the surface. These basement faults appear to have been active through much of geologic time. Indeed, more than 45 percent of modern earthquakes occur along these narrow...
Geological setting of U.S. fossil fuels.
C.D. Masters, R. F. Mast
1987, Episodes (10) 308-313
The USA has a special position in terms of fossil fuel development. Not only is it one of the most important nations in terms of resources of oil, gas and coal, but it has also been by far the dominant producer and consumer. In this thorough review of the regional...
Design of a spatial data structure using the relational normal forms
Jan W. van Roessel
1987, International Journal of Geographical Information Systems (1) 33-50
In previous work, a relational data structure aimed at the exchange of spatial data between systems was developed. As this data structure was relational it was of first normal form, but compliance with the higher normal forms was not investigated. Recently, a new procedural method for composing fully normalized data...
CONCEPTUAL MODELS FOR THE LASSEN HYDROTHERMAL SYSTEM.
S. E. Ingebritsen, M.L. Sorey
1987, Bulletin. Geothermal Resources Council (16) 3-9
The Lassen hydrothermal system, like a number of other systems in regions of moderate to great topographic relief, includes steam-heated features at higher elevations and high-chloride springs at lower elevations, connected to and fed by a single circulation system at depth. Two conceptual models for such systems are presented. They...
Faces from the past: Frederic Morton Chamberlain (1867-1921), pioneer fishery biologist of the American West
M.R. Jennings
1987, Fisheries (12) 22-29
The life of Frederic Morton Chamberlain (1867–1921) was marked by his many contributions to fishery science. As an assistant with the old U.S. Bureau of Fisheries, he pioneered life history studies of salmon in California and Alaska, and assisted in the collection of hundreds of thousands of natural history specimens...
Immunostimulation of antibody-producing cells and humoral antibody to fish bacterins by a biological response modifier
T. Kitao, T. Yoshida, D. P. Anderson, O. W. Dixon, A. Blanch
1987, Journal of Fish Biology (31) 87-91
Numbers of splenic antibody-producing cells and humoral antibody titres were elevated during immunization regimes in rainbow trout when the bacterins Yersinia ruckeri or Aeromonas salmonicida O-antigen preparations were mixed with the immunostimulator FK-565. Fish sampled 14 days after injection showed a marked increase in the immune response when doses of 5, 10 or 100...
SEA-ICE INFLUENCE ON ARCTIC COASTAL RETREAT.
Erk Reimnitz, P. W. Barnes
1987, Conference Paper
Recent studies document the effectiveness of sea ice in reshaping the seafloor of the inner shelf into sharp-relief features, including ice gouges with jagged flanking ridges, ice-wallow relief, and 2- to 6-m-deep strudel-scour craters. These ice-related relief forms are in disequilibrium with classic open-water hydraulic processes and thus are smoothed...
NEW APPLICATIONS IN THE INVERSION OF ACOUSTIC FULL WAVEFORM LOGS - RELATING MODE EXCITATION TO LITHOLOGY.
Frederick L. Paillet, C.H. Cheng, J.A. Meredith
1987, Log Analyst (28) 307-320
Existing techniques for the quantitative interpretation of waveform data have been based on one of two fundamental approaches: (1) simultaneous identification of compressional and shear velocities; and (2) least-squares minimization of the difference between experimental waveforms and synthetic seismograms. Techniques based on the first approach do not always work, and...
Stochastic model for the long-term transport of stored sediment in a river channel
Harvey M. Kelsey, Roland Lamberson, Mary Ann Madej
1987, Water Resources Research (2) 1738-1750
We develop a stochastic model for the transport of stored sediment down a river channel. The model is based on probabilities of transition of particles among four different sediment storage reservoirs, called active (often mobilized), semiactive, inactive, and stable (hardly ever mobilized). The probabilities are derived from computed sediment residence...
Power and speed of swimming dolphins
Clifford A. Hui
1987, Journal of Mammalogy (68) 126-132
The belief that dolphins have an extraordinary ability to generate propulsive power or can modify the water flow over their bodies to the low-resistance laminar flow is pervasive in the perception of the animals by the public and by some of the biology communities. I analyzed measured swimming speeds...
Origin of the lethal gas burst from Lake Monoun, Cameroun
Haraldur Sigurdsson, J.D. Devine, F.M. Tchua, F.M. Presser, M.K.W. Pringle, William C. Evans
1987, Journal of Volcanology and Geothermal Research (31) 1-16
On 15 August, 1984, a lethal gas burst issued from a submerged 96-m-deep crater in Lake Monoun in Cameroun, western Africa, killing 37 people. The event was associated with a landslide from the eastern crater rim, which slumped into deep water. Waters below 50 m are anoxic, dominated by high...
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...
Higher resolution satellite remote sensing and the impact on image mapping
Allen H. Watkins, June M. Thormodsgard
1987, Acta Astronautica (16) 221-232
Recent advances in spatial, spectral, and temporal resolution of civil land remote sensing satellite data are presenting new opportunities for image mapping applications. The U.S. Geological Survey's experimental satellite image mapping program is evolving toward larger scale image map products with increased information content as a result of improved image...
