Silvicultural systems and regeneration methods: Current practices and new alternatives
J. C. Tappeiner, D. Lavender, Robert O. Curtis, D.S. DeBell
1997, Book chapter, Creating a Forestry for the 21st Century: The Science of Ecosystem Management
No abstract available....
Shaping stand development through silvicultural practices
D.S. DeBell, Robert O. Curtis, C. Harrington, J. C. Tappeiner
1997, Book chapter, Creating a Forestry for the 21st Century: The Science of Ecosystem Management
No abstract available....
Nonnative brome grasses in the new national monument
D. W. Davidson, Jayne Belnap
1997, Conference Paper, Learning from the Land: Grand Staircase-Escalante National Monument Science Symposium proceedings
No abstract available....
Heat flow and geothermal field in Siberia
A.J. Golmshtok, A. Duchkov, D. R. Hutchinson, S.B. Khanukaev, A.I. El’nikov
1997, Russian Geology and Geophysics (38) 1714-1727
No abstract available....
Comparing nocturnal eddy covariance measurements to estimates of ecosystem respiration made by scaling chamber measurements at six coniferous boreal sites
M.B. Lavigne, M. G. Ryan, D.E. Anderson, D. D. Baldocchi, P.M. Crill, D.R. Fitzjarrald, M. L. Goulden, S.T. Gower, J.M. Massheder, J.H. McCaughey, M. Rayment, Robert G. Striegl
1997, Journal of Geophysical Research D: Atmospheres (102) 28977-28985
During the growing season, nighttime ecosystem respiration emits 30–100% of the daytime net photosynthetic uptake of carbon, and therefore measurements of rates and understanding of its control by the environment are important for understanding net ecosystem exchange. Ecosystem respiration can be measured at night by eddy covariance methods, but the...
Water quality study design for the Willamette Basin, Oregon, using a geographic information system Chapter 22
Mark A. Uhrich, Dennis A. Wentz
G.A. Best, T. Bogacka, E. Niemirycz, editor(s)
1997, Book chapter, International River Water Quality: Pollution and restoration
Captive-rearing piping plovers: Developing techniques to augment wild populations
A.N. Powell, F.J. Cuthbert, L.C. Wemmer, A.W. Doolittle, S.T. Feirer
1997, Zoo Biology (16) 461-477
Techniques for captive-rearing and releasing piping plovers (Charadrius melodus) were developed using a surrogate species, killdeer (Charadrius vociferus). We compared captive- and parent-reared killdeer, and parent-reared piping plovers and determined that growth and behavior were similar. After surrogate trials determined that captive-rearing was feasible, we used the same methods to raise piping plover chicks...
Characterization of the Martian surface deposits by the Mars Pathfinder rover, Sojourner
Jacob R. Matijevic, J. Crisp, Donald B. Bickler, R. S. Banes, B. K. Cooper, Howard J. Eisen, J. Gensler, A. Haldemann, F. Hartman, K. A. Jewett, L. H. Matthies, S. L. Laubach, A. H. Mishkin, J. C. Morrison, T. T. Nguyen, A. R. Sirota, H. W. Stone, S. Stride, L. F. Sword, J. A. Tarsala, A. D. Thompson, M. T. Wallace, R. Welch, E. Wellman, B. H. Wilcox, D. Ferguson, P. Jenkins, J. Kolecki, G. A. Landis, D. Wilt, H. J. Moore, F. Pavlics
1997, Science (278) 1765-1768
Sojourner, the Mars Pathfinder rover, discovered pebbles on the surface and in rocks that may be sedimentary—not volcanic—in origin. Surface pebbles may have been rounded by Ares flood waters or liberated by weathering of sedimentary rocks called conglomerates. Conglomerates imply that water existed elsewhere and earlier than the Ares flood....
Overview of the Mars Pathfinder Mission and assessment of landing site predictions
M. P. Golombek, R. A. Cook, T. Economou, W. M. Folkner, A. F. C. Haldemann, P. H. Kallemeyn, J. M. Knudsen, R. M. Manning, H. J. Moore, T. J. Parker, R. Rieder, J. T. Schofield, P. H. Smith, R. M. Vaughan
1997, Science (278) 1743-1748
Chemical analyses returned by Mars Pathfinder indicate that some rocks may be high in silica, implying differentiated parent materials. Rounded pebbles and cobbles and a possible conglomerate suggest fluvial processes that imply liquid water in equilibrium with the atmosphere and thus a warmer and wetter past. The moment of inertia...
Results from the Mars Pathfinder camera
P. H. Smith, J. F. Bell, N. T. Bridges, D.T. Britt, Lisa R. Gaddis, R. Greeley, H.U. Keller, Kenneth E. Herkenhoff, R. Jaumann, J. R. Johnson, Randolph L. Kirk, M. Lemmon, J.N. Maki, M.C. Malin, S.L. Murchie, J. Oberst, T. J. Parker, R.J. Reid, R.M. Sablotny, Laurence A. Soderblom, C. Stoker, R. Sullivan, N. Thomas, M.G. Tomasko, W. Ward, E. Wegryn
1997, Science (278) 1758-1765
Images of the martian surface returned by the Imager for Mars Pathfinder (IMP) show a complex surface of ridges and troughs covered by rocks that have been transported and modified by fluvial, aeolian, and impact processes. Analysis of the spectral signatures in the scene (at 440- to 1000-nanometer wavelength) reveal...
Post seismic deformation associated with the 1992 Mω = 7.3 Landers earthquake, southern California
James C. Savage, Jerry L. Svarc
1997, Journal of Geophysical Research B: Solid Earth (102) 7565-7577
Following the 1992 Mω=7.3 Landers earthquake, a linear array of 10 geodetic monuments at roughly 5‐km spacing was established across the Emerson fault segment of the Landers rupture. The array trends perpendicular to the local strike of the fault segment and extends about 30 km on either side of it. The...
Surface strain accumulation and the seismic moment tensor
James C. Savage, Robert W. Simpson
1997, Bulletin of the Seismological Society of America (87) 1345-1353
Although the scalar moment accumulation rate within the seismogenic zone beneath a given area is sometimes deduced from the observed average surface strain accumulation rate over that same area (e.g., Working Group on California Earthquake Probabilities, 1995), the correspondence between the two is very uncertain. The equivalence between surface strain...
New approaches to the analysis of population trends in land birds: Comment
William A. Link, John R. Sauer
1997, Ecology (78) 2632-2634
James et al. (1996, Ecology 77:13-27) used data from the North American Breeding Bird Survey (BBS) to examine geographic variability in patterns of population change for 26 species of wood warblers. They emphasized the importance of evaluating nonlinear patterns of change in bird populations, proposed LOESS-based non-parametric and...
Water-resources investigations in Tennessee; programs and activities of the U.S. Geological Survey, 1995-96
B.H. Balthrop, K.A. Carney
1997, Open-File Report 97-113
The report contains summaries of projects and activities in the Tennessee District of the U.S. Geological Survey, U.S. Department of the Interior,from 1995-96. Each summary includes the location, the objective of the project, the progress of the study to date, and the names of the cooperators...
Estimates of bridge scour at two sites on the Virgin River, southeastern Nevada, using a sediment-transport model and historical geomorphic data
M.M. Hilmes, J. E. Vaill
1997, Water-Resources Investigations Report 97-4073
A bridge-scour study by the U.S. Geological Survey, in cooperation with the Nevada Department of Transportation, began in April 1996 to evaluate the Mesquite, Nevada, and Riverside, Nevada, bridges on the lower Virgin River using a sediment-transport model and historical geomorphic data. The BRIdge Stream Tube model for Alluvial River...
Preliminary geologic map of the San Fernando 7.5' quadrangle, southern California: A digital database
R.F. Yerkes
1997, Open-File Report 97-163
The city of San Fernando sits atop a structurally complex, sedimentologically diverse, and tectonically evolving late Tertiary-Quaternary basin situated within the Transverse Ranges of southern California. The surrounding San Fernando Valley (SFV) contains the headwaters of the Los Angeles River and its tributaries. Prior to the advent of flood control,...
Alaska resource data file: False Pass quadrangle
Frederic H. Wilson
1997, Open-File Report 97-169
No abstract available....
Perception of neighboring plants by rhizomes and roots: Morphological manifestations of a clonal plant
Elisabeth Huber-Sannwald, M. M. Caldwell, David A. Pyke
1997, Canadian Journal of Botany (75) 2146-2157
A previous study showed that clonal morphology of the rhizomatous grass Elymus lanceolatus ssp. lanceolatus (Scibner & J.G. Smith Gould) was influenced more by neighbouring root systems than by the local distribution of nutrients. In this study we determine whether individual rhizomes or roots of E. lanceolatus perceive neighbouring root systems and how this is manifested in...
Preliminary geologic map of the Van Nuys 7.5' quadrangle, southern California: A digital database
R.F. Yerkes
1997, Open-File Report 97-165
No abstract available....
Hydrologic and water-quality conditions in the Horse Creek basin, west-central Florida, October 1992-February 1995
B. R. Lewelling
1997, Water-Resources Investigations Report 97-4077
A baseline study of the 241-square-mile Horse Creek basin was undertaken from October 1992 to February 1995 to assess the hydrologic and water-quality conditions of one of the last remaining undeveloped basins in west-central Florida. During the period of the study, much of the basin remained in a natural state,...
Study plan for urban stream indicator sites of the National Water-Quality Assessment Program
T. J. Lopes, C. V. Price
1997, Open-File Report 97-25
Urban Indicator Sites are one component of the U.S. Geological Survey?s National Water- Quality Assessment (NAWQA) Program. The objectives of monitoring at the Urban Indicator Sites are to: (1) characterize stream quality from drainage basins with predominantly residential and commercial land use, and (2) determine which selected natural and human...
Methane in coastal sea water, sea ice, and bottom sediments, Beaufort Sea, Alaska; results from 1995
T.D. Lorenson, K.A. Kvenvolden
1997, Open-File Report 97-54
Surface-water quality changes after 5 years of nutrient management in the Little Conestoga Creek headwaters, Pennsylvania, 1989-91
Edward H. Koerkle, Linda C. Gustafson-Minnich, Michael D. Bilger
1997, Water-Resources Investigations Report 97-4048
A 5.82-square-mile drainage basin in the headwaters of the Little Conestoga Creek in Lancaster County, Pa., was investigated from October 1989 through September 1991 as part of a longer-term effort to determine the effects of nutrient management on surface-water quality. A previous investigation found no statistical evidence that implementation of...
Pesticides associated with suspended sediments in the San Francisco Bay Estuary, California
Brian A. Bergamaschi, Kathryn L. Crepeau, Kathryn Kuivila
1997, Open-File Report 97-24
During the study of inputs of sediment-associated pesticides into the San Francisco Bay Estuary, suspended sediments were isolated from large-volume water samples collected over several years at various stations in Suisun Bay and also covering the principal inputs and outlet. The samples were analyzed for 21 pesticides and pesticide degradation...
Nitrogen and pesticide concentrations in an agricultural basin in north-central Connecticut
John R. Mullaney, Marc James Zimmerman
1997, Water-Resources Investigations Report 97-4076
