Climatic control of vegetation distribution: The role of the water balance
Nathan L. Stephenson
1990, American Naturalist (135) 649-670
The water balance describes climate as it is sensed by plants, as the interaction of energy and water in the environment. Discriminant analysis showed that the distribution of North American plant formations was more highly correlated with the water balance (actual evapotranspiration and deficit) than with the more traditional measures...
Geosciences
Roger D. Borcherdt, N. C. Donovan, D. Eberhart-Phillips, A. Michael, Paul A. Reasenberg, L. Dietz, W. Ellsworth, Daniel J. Ponti, Ray E. Wells, R. A. Haugerud, M. M. Clark, N. T. Hall
1990, Earthquake Spectra (6) 7-24
No abstract available....
Petrogenetic evolution of the torfajökull volcanic complex, Iceland I. relationship between the magma types
R. Macdonald, D.W. Mcgarvie, H. Pinkerton, R. L. Smith, A. Palacz
1990, Journal of Petrology (31) 429-459
The Torfajökull volcano, Iceland's largest silicic centre, is situated close to the junction of the active, southerly propagating Eastern Rift Zone and the South Eastern Zone, an older crustal segment. This paper provides major, trace, and some Sr isotope data on postglacial (<10000 y) rocks, i.e., tholeiitic magmas of the...
Petrogenetic evolution of the torfajökull volcanic complex, Iceland II. The role of magma mixing
D.W. Mcgarvie, R. Macdonald, H. Pinkerton, R.L. Smith
1990, Journal of Petrology (31) 461-481
In southern Iceland, tholeiitic basalt magmas propagating laterally from the active Eastern Rift Zone into the older cmstal segment of the South Eastern Zone have been injected into Torfajökull, a mature volcanic centre dominated by rhyolites. Eruptions of complex suites of mixed and hybrid rocks have been triggered, involving tholeiites...
Ostwald ripening of clays and metamorphic minerals
Dennis D. Eberl, J. Srodon, M. Kralik, B.E. Taylor, Zell E. Peterman
1990, Science (248) 474-477
Analyses of particle size distributions indicate that clay minerals and other diagenetic and metamorphic minerals commonly undergo recrystallization by Ostwald ripening. The shapes of their particle size distributions can yield the rate law for this process. One consequence of Ostwald ripening is that a record of the recrystallization process is...
Travertine-marl: Stream deposits in Virginia
Janet S. Herman, David A. Hubbard Jr., editor(s)
1990, Book, Virginia Division of Mineral Resources Publication
The quantification of instream flow rights to water
Robert T. Milhous
1990, Book, Proceedings of the American Geophysical Union, Tenth Annual Hydrology Days
Energy development of all types continues to grow in the Rocky Mountain Region of the western United States. Federal resource managers increasingly need to balance energy demands, their effects on the natural and human landscape, and public perceptions towards these issues. The Western Energy Citation Clearinghouse (WECC v.1.0), part of...
Calibration of an effective habitat time series
T.J. Waddle
1990, Book, Proceedings of the American Geographical Union Tenth Annual Hydrology Days
No abstract available....
Earthquake depths and the relation to strain accumulation and stress near strike-slip faults in southern California
Christopher O. Sanders
1990, Journal of Geophysical Research (95) 4751-4762
In this paper I report and attempt to interpret several observations about the depth distribution of earthquakes in the region of southern California containing the southern San Andreas and San Jacinto fault zones. These observations are as follows: (1) Earthquakes in the major fault zones are predominantly deep (maximum, 22...
Yellowstone bison population increases in relation to human activity
M. Meagher
1990, Book, Northern Range Meeting
No abstract available....
Field testing of commercially manufactured capture collars on white-tailed deer
L. David Mech, Kyran E. Kunkel, Richard C. Chapman, Terry J. Kreeger
1990, Journal of Wildlife Management (54) 297-299
We conducted 31 tests of commercially manufactured capture collars on female white-tailed deer (Odocoileus virginianus) in the Superior National Forest, Minnesota, under temperatures from -37C to 22C. Deer were recaptured in 28 of the 31 tests; in the 3 failures, we remotely released the collars from the deer. Communication with...
Stability and bias of classification rates in biological applications of discriminant analysis
Byron K. Williams, Kimberly Titus, James E. Hines
1990, Journal of Wildlife Management (54) 331-341
We assessed the sampling stability of classification rates in discriminant analysis by using a factorial design with factors for multivariate dimensionality, dispersion structure, configuration of group means, and sample size. A total of 32,400 discriminant analyses were conducted, based on data from simulated populations with appropriate underlying statistical distributions. Simulation...
Minimizing capture-related stress on white-tailed deer with a capture collar
Glenn D. DelGiudice, Kyran E. Kunkel, L. David Mech, Ulysses S. Seal
1990, Journal of Wildlife Management (54) 299-303
We compared the effect of 3 capture methods for white-tailed deer (Odocoileus virginianus) on blood indicators of acute excitement and stress from 1 February to 20 April 1989. Eleven adult females were captured by Clover trap or cannon net between 1 February and 9 April 1989 in northeastern Minnesota. These...
Estimation of confidence intervals for federal waterfowl harvest surveys
Paul H. Geissler
1990, Journal of Wildlife Management (54) 201-205
I developed methods of estimating confidence intervals for the federal waterfowl harvest surveys conducted by the U.S. Fish and Wildlife Service (USFWS). I estimated flyway harvest confidence intervals for mallards (Anas platyrhynchos) (95% CI are ± 8% of the estimate). Canada geese (Branta canadensis) (±11%), black ducks (Anas rubripes) (±16%),...
North-south gradient in survival rates in midcontinental populations of mallards
Jay B. Hestbeck
1990, Journal of Wildlife Management (54) 206-210
I used band recovery data to test for the existence of a north-south gradient in survival and recovery rates for midcontinental populations of mallards (Anas platyrhynchos) during 3 time periods (1962-70, 1971-78, 1979-84). Mean annual survival rates for adult males and females were significantly associated with mean banding latitude (P...
Indices used to assess status of sea otter populations: A reply
James A. Estes
1990, Journal of Wildlife Management (54) 270-272
The California sea otter (Enhydra lutris) population, after increasing for more than half a century, stabilized and probably declined from the mid-1970's to the mid-1980's. Estes et al. (1986) suggested that the stabilization and decline were not due to food limitation. Garshelis et al. (1990) challenged this suggestion, although in...
An evaluation of techniques to measure contour feather molt in ducks
Rodger D. Titman, Marie-Christine LaGrenade, Michael R. Miller
1990, Journal of Wildlife Management (54) 219-222
We evaluated 3 techniques (air jet, flat skin, grab sample) to assess molt in dead waterfowl (green- winged teal [Anas crecca] and king eider [Somateria spectabilis]). The air jet technique was fast and required no specimen preparation. The flat skin technique required lengthy preparation time after which molt was assessed...
Source parameters for small events associated with the 1986 North Palm Springs, California, earthquake determined using empirical Green functions
Jim Mori, Arthur D. Frankel
1990, Bulletin of the Seismological Society of America (80) 278-295
Using small events as empirical Green functions, which include path, site, and instrument effects on the P waveforms, source parameters were estimated for 25 ML 3.4 to 4.4 events associated with the 1986 North Palm Springs earthquake. The static stress drops ranged from 3 to 80 bars, for moments of 0.7 to 11 ×...
Scientific communications: Origin of rhyolite-hosted tin mineralization: Evidence from the Taylor creek Rhyolite, New Mexico
W. A. Duffield, B.L. Reed, D.H. Richter
1990, Economic Geology (85) 392-398
No abstract available....
Indices used to assess status of sea otter populations: a reply
James A. Estes
1990, Journal of Wildlife Management (54) 270-272
The California sea otter (Enhydra lutris) population, after increasing for more than half a century, stabilized and probably declined from the mid-1970's to the mid-1980's. Estes et al. (1986) suggested that the stabilization and decline were not due to food limitation. Garshelis et al. (1990) challenged this suggestion,...
Pore pressure response during failure in soils
Edwin Harp, Wade G. Wells II, John G. Sarmiento
1990, Geological Society of America Bulletin (102) 428-438
Three experiments were performed on natural slopes to investigate variations of soil pore-water pressure during induced slope failure. Two sites in the Wasatch Range, Utah, and one site in the San Dimas Experimental Forest of southern California were forced to fail by artificial subsurface irrigation. The sites were instrumented with...
Suggested nomenclature for landslides
D.M. Cruden, S. Novograd, G.A. Pilot, E. Krauter, R.K. Bhandari, V. Cotecchia, H. Nakamura, C.O. Okagbue, Zhang Zhuoyuan, J.N. Hutchinson, D. J. Varnes, G.I. Ter-Stepanian
1990, Bulletin of the International Association of Engineering Geology (41) 13-16
The IAEG Commission on Landslides and other Mass Movements on Slopes has proposed English and French names for 19 identifiable features of slope movements and for 7 dimensions of those features. The Commission intends to publish this list in other languages and to supplement and revise it from time to...
A suggested method for reporting a landslide
Robin Fell, W. Lacerda, D.M. Cruden, S.G. Evans, P. LaRochelle, Fernando Martinez, Lisandro Beltran, J. Jesenak, S. Novograd, E. Krauter, E. Slunga, G.A. Pilot, E.W. Brand, J. Farkas, R.K. Bhandari, V. Cotecchia, Franco Esu, H. Fujita, H. Nakamura, K. Sassa, W.H. Ting, Graham Salt, Nilmar Janbu, A.M. Nespak, Wang Gongxian, Zhang Zhuoyuan, R. Michelena, Mihai Popescu, Leif Viberg, C. Bonnard, J.N. Hutchinson, H.H. Einstein, R. L. Schuster, D. J. Varnes, Z.G. Ter-Martirosian, G.I. Ter-Stepanian, P. Anagnosti, M. Hashizume, Masayuki Watanabe
1990, Bulletin of the International Association of Engineering Geology 5-12
The Landslide Report is a Suggested Method developed by the International Geotechnical Societies' UNESCO Working Party on World Landslide Inventory for reporting the position, date, type, geometry, volume and damage of significant landslides....
C4 acid fixation in photosynthesis of the submerged aquatic Eleocharis acicularis (L.) R. & S
B. A. Morton, Jon E. Keeley
1990, Aquatic Botany (36) 379-388
Eleocharis acicularis (L.) R. & S. is a widely distributed submerged aquatic macrophyte. In southern California, it codominates shallow seasonal pools with the aquatic CAM plant Isoetes howellii Engelm. Like the latter species, E. acicularis is apparently restricted to uptake of free-CO2; bicarbonate uptake is negligible, as indicated by poor carbon fixation at pH 7...
Long-term vegetation change at a fully protected Sonoran Desert site
Raymond M. Turner
1990, Ecology (71) 464-477
To investigate desert vegetation dynamics, I undertook an open—ended study of a site that offers a combination of multiple observations through time with continuous protection from domestic livestock and other human impacts. The site is MacDougal Crater in the Sierra del Pinacate Reserve, Sonora, Mexico. Three sources of data have...
