Population dynamics and bioenergetics of a fossorial herbivore, Thomomys talpoides (Rodentia: Geomyidae), in a spruce-fir sere
Douglas C. Andersen, James A. MacMahon
1981, Ecological Monographs (51) 179-202
Studies of the bioenergetics of the northern pocket gopher, Thomomys talpoides, are coupled with data on demography, activity budgets, and microclimates to model the energy requirements of individuals and populations in the Wasatch Mountains of Utah during 1976-1979. Metabolic rates during rest increased linearly with decreasing ambient temperature, but...
Broad area forest fuels and topography mapping using digital Landsat and terrain data
Mark Shasby, Robert E. Burgan, Gregg R. Johnson
1981, Conference Paper, Seventh international symposium: Machine processing of remotely sensed data
A spatially registered digital data base of fuels and terrain information was generated for a test site on the Lolo National Forest in Montana. The data base was developed specifically for providing spatially relevant data to a mathematical fire behavior model developed by the Forest Service which integrates this information...
Zooplankton fecal pellets link fossil fuel and phosphate deposits
K.G. Porter, E. I. Robbins
1981, Science (212) 931-933
Fossil zooplankton fecal pellets found in thinly bedded marine and lacustrine black shales associated with phosphate, oil, and coal deposits, link the deposition of organic matter and biologically associated minerals with planktonic ecosystems. The black shales were probably formed in the anoxic basins of coastal marine waters,...
Petrographic and chemical characteristics of pyrite-marcasite mineralization in hole 465A, southern Hess Rise
Randolph A. Koski, James R. Hein
1981, Initial reports of the Deep Sea Drilling Project (62) 855-862
Core recovered from Hess Rise contains concentrations of pyrite, marcasite, and barite in the lowermost meter of limestone (Unit II) and in the brecciated upper part of the underlying volcanic basement (Unit HI). Petrographic and chemical data indicate that the sulfide-barite assemblage in the limestone is mainly a product of...
Development of the benethic nepheloid layer on the south Texas continental shelf, western Gulf of Mexico
Gerald L. Shideler
1981, Marine Geology (41) 37-61
A monitoring study of suspended sediment on the South Texas Continental Shelf indicates that a turbid benthic nepheloid layer is regionally persistent. A sequence of quasi-synoptic measurements of the water column obtained during six cruises in an 18-month period indicates substantial spatial and temporal variability in nepheloidlayer characteristics. Regionally, the...
Reservoir analysis of the Denver earthquakes: A case of induced seismicity
Paul A. Hsieh, John D. Bredehoeft
1981, Journal of Geophysical Research D: Atmospheres (86) 903-920
Injection of fluid wastes into the fractured Precambrian crystalline bedrock beneath the Rocky Mountain Arsenal near Denver triggered earthquakes in the 1960's. An analysis, based on the assumption that fluid flow in the fractured reservoir can be approximated by flow in a porous medium, is presented. The configuration and hydrologic...
Encounter with Saturn: Voyager 1 imaging science results
B.A. Smith, L. Soderblom, R. Beebe, J. Boyce, G. Briggs, A. Bunker, S.A. Collins, C.J. Hansen, T. V. Johnson, J.L. Mitchell, R.J. Terrile, M. Carr, A.F. Cook II, J. Cuzzi, James B. Pollack, G. Edward Danielson, A. Ingersoll, M. E. Davies, G.E. Hunt, H. Masursky, E. Shoemaker, D. Morrison, Tobias Owen, C. Sagan, J. Veverka, R. Strom, V.E. Suomi
1981, Science (212) 163-191
As Voyager 1 flew through the Saturn system it returned photographs revealing many new and surprising characteristics of this complicated community of bodies. Saturn's atmosphere has numerous, low-contrast, discrete cloud features and a pattern of circulation significantly different from that of Jupiter. Titan is shrouded in a...
Estimating rangeland cover proportions with large-scale color-infrared aerial photographs
Calvin J. Van Zee, Kris Bonner
1981, Conference Paper, Proceedings of the eighth biennial workshop on color aerial photography in the plant sciences
No abstract available....
Return of the gray wolf to Wisconsin
L. David Mech, R. M. Nowak
1981, American Midland Naturalist (105) 408-409
Five gray wolf (Canis lupus) specimens were examined from Wisconsin from 1975 through 1979; each had been killed by human beings, accidentally or intentionally. This confirms the presence of wolves in Wisconsin and supports the hypothesis that human-related mortality is the factor limiting the population....
Suspected Great Blue Heron population decline after a severe winter in the Columbia Basin
Lawrence J. Blus, Charles J. Henny
1981, Murrelet (62) 16-18
The wintering range of the Great Blue Heron (Ardea herodias) extends further north than does that of any other member of the Ciconiiformes in North America. The northern limits of its range extend along the Pacific coast into southeastern Alaska, into Massachusetts on the Atlantic coast, and inland into...
Weather conditions associated with beginning of northward migration departures of snow geese
Edward L. Flickinger
1981, Journal of Wildlife Management (45) 516-520
No abstract available. ...
Species differences in hematological values of captive cranes, geese, raptors, and quail
George F. Gee, James W. Carpenter, Gary L. Hensler
1981, Journal of Wildlife Management (45) 463-483
Hematological and serum chemical constituents of blood were determined for 12 species, including 7 endangered species, of cranes, geese, raptors, and quail in captivity at the Patuxent Wildlife Research Center. Means, standard deviations, analysis of variance by species and sex, and a series of multiple comparisons of means were derived...
Polychlorinated biphenyl (Aroclor (R) 1254) residues in rainbow trout: Effects on sensitivity to nine fishery chemicals
T.D. Bills, L. L. Marking, W.L. Mauck
1981, North American Journal of Fisheries Management (1) 200-203
The influence of background polychlorinated biphenyl (PCB) residues in rainbow trout (Salmo gairdneri) on the susceptibility of the fish to nine chemicals routinely or occasionally used in fishery operations was evaluated. Rainbow trout fry were divided into three groups: one was exposed to 0.01 ppb and another to 0.1 ppb...
Wildlife mortality at petroleum pits in Texas
Edward L. Flickinger
1981, Journal of Wildlife Management (45) 560-564
No abstract available. ...
Permian and Triassic rocks near Quinn River Crossing, Humboldt County, Nevada
Keith B. Ketner, Bruce R. Wardlaw
1981, Geology (9) 123-126
Permian and Triassic rocks near Quinn River Crossing, Humboldt County, Nevada, consist of four structural blocks: (1) a Lower Permian volcanic block; (2) a Permian(?) chert-arenite block; (3) a Lower Permian limestone block; and (4) a Permian and Triassic block. The contacts between the Permian volcanic block and the others...
Dark CO2-fixation and diurnal malic acid fluctuations in the submerged-aquatic Isoetes storkii
Jon E. Keeley, B. Morton, B. Babcock, P. Castillo, B. Fish, E. Jerauld, B. Johnson, L. Landre, H. Lum, C. Miller, A. Parker, G. Van Steenwyk
1981, Oecologia (48) 332-333
In the leaves (but not corms) of the submerged aquatic Isoetes storkii malic acid concentration fluctuated from 22 μeg g FW-1 in the evening to 171 μeg g FW-1 in the morning. Associated with this was a change in titratable acidity of 152 μeg g FW-1 between morning and evening. 14C carbon was fixed in both...
The Saudi Arabian Deputy Ministry for Mineral Resources Remote Sensing Center : services and applications of Landsat Data
Kenneth P. Ferguson Jr., Water Resources Division, U.S. Geological Survey, Saudi Arabia. Deputy Ministry for Mineral Resources
1981, Report
An earth-science bibliography of the Arabian Peninsula and surrounding area, 1980 supplement
Saudi Arabia. Deputy Ministry for Mineral Resources, U.S. Geological Survey Saudi Arabia Mission
1981, Book
An interagency report prepared by the U.S. Geological Survey Saudi Arabian Mission for the Ministry of Petroleum and Mineral Resources, Kingdom of Saudi Arabia....
Geology and concepts of genesis of important types of uranium deposits
J. Thomas Nash, H.C. Granger, S.S. Adams
1981, Book chapter, Economic Geology, Seventy-Fifth Anniversary Volume
Uranium ore deposits occur in nearly every major rock type in the earth’s crust, and nearly all igneous, metamorphic, and sedimentary processes are capable of concentrating or dispersing uranium. However, only three types of deposits account for more than 70 percent of known Western World Reasonably Assured Resources (WWRAR): Precambrian...
Seismicity of the Yanbu region Kingdom of Saudi Arabia
Habib M. Merghelani, J.L. Irvine, U.S. Geological Survey Saudi Arabian Project, Saudi Arabia. Wizārat al-Batrūl wa-al-Tharwah al-Maʻdinīyah
1981, Book
Pacific Coast coccolith stratigraphy between Point Conception and Cabo Corrientes, Deep Sea Drilling Project Leg 63
David Bukry
1981, Initial Reports of the D.S.D.P. (63) 445-471
DSDP Leg 63 recovered Neogene coccoliths from south of Point Conception, California (Site 467), to north of Cabo Corrientes, Mexico (Site 473), as part of a traverse exploring the sedimentary record of the California Current along the Pacific Coast. A combination of temperate and tropical zonations were used to date...
Silicoflagellate stratigraphy of offshore California and Baja California, Deep Sea Drilling Project, Leg 63.
David Bukry
1981, Initial Reports of the D.S.D.P. (63) 539-557
Quantitative study of middle and upper Miocene silicoflagellate assemblages from Pacific Coast Sites 467 and 469 to 472 has permitted identification of warm- and temperate-water biostratigraphic zones and the formulation of a model for relative paleotemperature values (Ts) on the basis of warm- and temperate-genera abundances. Geographic and temporal trends...
An empirical methodology for estimating entrainment losses at power plants sited on estuaries
J. Boreman, C.P. Goodyear, S.W. Christensen
1981, Transactions of the American Fisheries Society (110) 253-260
A model based on empirically derived age‐, time‐, and space‐variant entrainment susceptibility data may be used for estimating conditional entrainment mortality of aquatic organisms, particularly fish and shellfish, caused by operation of one or more power plants on an estuary. Model application requires knowledge of the morphometry of the water...
Swash mark and grain flow
Sallenger Jr.
1981, Journal of Sedimentary Petrology (51) 261-264
Swash marks composed entirely of coarse sand are commonly found on coarse-sand beaches. These swash marks are 10 to 30 centimeters in width and a few millimeters to one centimeter in height. Previous observations, mostly on finer-sand beaches, indicate swash marks are seldom over a few millimeters in height and...
Geomorphology and sediment stability of a segment of the U.S. continental slope off New Jersey
James M. Robb, J.C. Hampson Jr., D.C. Twichell
1981, Science (211) 935-937
The morphology of complex deposits of Pleistocene sediments covering the upper continental slope between Lindenkohl Canyon and South Toms Canyon results from both depositional and erosional processes. Small slump or slide features were detected primarily on the flanks of canyons or valleys and were observed to occur...
