Crested wheatgrass-cheatgrass seedling competition in a mixed-density design
Francis, M.G., Pyke, D.A., 1996, Crested wheatgrass-cheatgrass seedling competition in a mixed-density design: Journal of Range Management, v. 49, no. 5, p. 432-438.
David A Pyke
Biography
Education
Ph.D. Botany, 1983, Washington State University
M.S. Forest and Range Management, 1977, Washington State University
B.S. Range Management (Wildlife option), 1976, Washington State University
Specialty
Plant ecology, restoration ecology, monitoring and assessments of ecosystem status of rangelands (grassland, shrublands and savannas)
Research Interests
Population ecology of native and invasive plants in the Intermountain West. Monitoring protocols for ecosystem integrity on wild lands. Restoration ecology of native plants on disturbed and invaded lands.
Personal Interests
Skiing, Cycling, Baseball, Softball, Gardening, & Beer Brewing
Background
Former Assistant Center Director of FRESC 1996-1999
Science and Products
Year Published: 2005
Short-term responses of desert soil and vegetation to removal of feral burros and domestic cattle (California)
Beever, Erik A.; Pyke, David A.Attribution: Northern Rocky Mountain Science Center (NOROCK), Forest and Rangeland Ecosystem Science Center (FRESC), Ecosystems,
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Short-term responses of desert soil and vegetation to removal of feral burros and domestic cattle (California); 2005; Article; Journal; Ecological Restoration; Beever, Erik A.; Pyke, David A.
Year Published: 2004
Integrated monitoring of hydrogeomorphic, vegetative, and edaphic conditions in riparian ecosystems of Great Basin National Park, Nevada
In semiarid regions such as the Great Basin, riparian areas function as oases of cooler and more stable microclimates, greater relative humidity, greater structural complexity, and a steady flow of water and nutrients relative to upland areas. These qualities make riparian areaʼs attractive not only to resident and migratory wildlife, but also to...
Beever, Erik A.; Pyke, D.A.Attribution: Forest and Rangeland Ecosystem Science Center (FRESC), Northern Rocky Mountain Science Center (NOROCK), Ecosystems, Sage-grouse & Sagebrush Ecosystem, , United States of America
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Integrated monitoring of hydrogeomorphic, vegetative, and edaphic conditions in riparian ecosystems of Great Basin National Park, Nevada; 2004; SIR; 2004-5185; Beever, Erik A.; Pyke, D. A.
Year Published: 2004
Effects of invasive alien plants on fire regimes
Plant invasions are widely recognized as significant threats to biodiversity conservation worldwide. One way invasions can affect native ecosystems is by changing fuel properties, which can in turn affect fire behavior and, ultimately, alter fire regime characteristics such as frequency, intensity, extent, type, and seasonality of fire. If the...
Brooks, M.L.; D'Antonio, C. M.; Richardson, D.M.; DiTomaso, J.M.; Grace, J.B.; Hobbs, R.J.; Keeley, J.E.; Pellant, M.; Pyke, D.Attribution: Western Ecological Research Center, Forest and Rangeland Ecosystem Science Center (FRESC), Ecosystems
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Effects of invasive alien plants on fire regimes; 2004; Article; Journal; BioScience; Brooks, M. L.; D'Antonio, C. M.; Richardson, D. M.; DiTomaso, J. M.; Grace, J. B.; Hobbs, R. J.; Keeley, J. E.; Pellant, M.; Pyke, D.
Year Published: 2004
Science for the changing Great Basin
The U.S. Geological Survey (USGS), with its multidisciplinary structure and role as a federal science organization, is well suited to provide integrated science in the Great Basin of the western United States. A research strategy developed by the USGS and collaborating partners addresses critical management issues in the basin, including invasive...
Beever, Erik; Pyke, David A.Attribution: Forest and Rangeland Ecosystem Science Center (FRESC), Northern Rocky Mountain Science Center (NOROCK), Ecosystems, Sage-grouse & Sagebrush Ecosystem, , United States of America
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Science for the Changing Great Basin; 2004; FS; 2004-3071; Beever, Erik; Pyke, David A.
Year Published: 2003
Interactions of cattle grazing and climate change- hierarchical data analysis
No abstract available.
Clausnitzer, D.; Huso, Manuela M. P.; Pyke, David A.; Belnap, Jayne; Graham, T.B.; Sanford, R. L.; Phillips, S.L.
Year Published: 2003
New proposed national resources inventory protocols on nonfederal rangelands
No abstract available.
Spaeth, K.E.; Pierson, F.B.; Herrick, J.E.; Shaver, P.; Pyke, David A.; Pellant, Mike; Thompson, D.; Dayton, B.View Citation
New proposed national resources inventory protocols on nonfederal rangelands; 2003; Article; Journal; Journal of Soil and Water Conservation; Spaeth, K. E.; Pierson, F. B.; Herrick, J. E.; Shaver, P.; Pyke, David A.; Pellant, Mike; Thompson, D.; Dayton, B.
Year Published: 2003
Restoring forbs for sage grouse habitat: Fire, microsites, and establishment methods
The decline and range reduction of sage grouse populations are primarily due to permanent loss and degradation of sagebrusha??grassland habitat. Several studies have shown that sage grouse productivity may be limited by the availability of certain preferred highly nutritious forb species that have also declined within sagebrush ecosystems of the...
Wirth, Troy A.; Pyke, David A.View Citation
Restoring forbs for sage grouse habitat: Fire, microsites, and establishment methods; 2003; Article; Journal; Restoration Ecology; Wirth, Troy A.; Pyke, David A.
Year Published: 2003
The effect of stochiastic technique on estimates of population viability from transition matrix models
Population viability analysis is an important tool for conservation biologists, and matrix models that incorporate stochasticity are commonly used for this purpose. However, stochastic simulations may require assumptions about the distribution of matrix parameters, and modelers often select a statistical distribution that seems reasonable without...
Kaye, T.N.; Pyke, David A.View Citation
The effect of stochiastic technique on estimates of population viability from transition matrix models; 2003; Article; Journal; Ecology; Kaye, T. N.; Pyke, David A.
Year Published: 2003
Transitions in rangeland evaluations: A review of the major transitions in rangeland evaluations during the last 25 years and speculation about future evaluations
No abstract available.
Pyke, David A.; Herrick, J.E.View Citation
Transitions in Rangeland Evaluations; 2003; Article; Journal; Rangelands; Pyke, David A.; Herrick, J. E.
Year Published: 2002
Rangeland health attributes and indicators for qualitative assessment
Panels of experts from the Society for Range Management and the National Research Council proposed that status of rangeland ecosystems could be ascertained by evaluating an ecological site's potential to conserve soil resources and by a series of indicators for ecosystem processes and site stability. Using these recommendations as a starting point...
Pyke, David A.; Herrick, J.E.; Pellant, MikeView Citation
Rangeland health attributes and indicators for qualitative assessment; 2002; Article; Journal; Journal of Range Management; Pyke, David A.; Herrick, J. E.; Pellant, Mike; Pellant, Mike
Year Published: 2002
Assessing rangelands
It is important for land managers and technical assistance specialists to be able to assess the health of rangelands in order to know where to focus management efforts. The complexity of ecological processes, and the inherent expense of directly measuring site integrity, suggests a need for an evaluation process that focuses instead on biological...
Pyke, David A.View Citation
Assessing rangelands; 2002; FS; 125-02; Pyke, David A.
Year Published: 2002
Born of fire - restoring sagebrush steppe
Fire is a natural feature of sagebrush grasslands in the Great Basin. The invasion of exotic annual grasses, such as Bromus tectorum (cheatgrass), has changed the environment in these ecosystems. Invasive annual grasses provide a dense and continuous source of fuel that extends the season for fires and increases the frequency of fires in the...
Pyke, David A.View Citation
Born of fire - restoring sagebrush steppe; 2002; FS; 126-02; Pyke, David A.
Pre-USGS Publications
Introduction to the Sustaining Rangeland Ecosystems Symposium
Tanaka, J.A., Pyke, D.A., 1996, Introduction to the Sustaining Rangeland Ecosystems Symposium In Edge, W.D., Olson-Edge, S.L., eds., Proceedings of the Sustaining Rangeland Ecosystems Symposium: Special Report 953, Corvallis, OR, Oregon State University, Agricultural Experiment Station, p. 1-2.
Morphological plasticity following species-specific recognition and competition in two perennial grasses
Huber-Sannwald, E., Pyke, D.A., Caldwell, M.M., 1996, Morphological plasticity following species-specific recognition and competition in two perennial grasses: American Journal of Botany, v. 83, no. 7, p. 919-931.
Population diversity with special reference to rangeland plants
Pyke, D.A., 1995, Population diversity with special reference to rangeland plants In West, N.E., ed., Biodiversity of Rangelands: Logan, Utah, College of Natural Resources, Utah State University, p. 21-32.
Cheatgrass demography-establishment attributes, recruitment, ecotypes, and genetic variability
Pyke, D.A., Novak, S.J., 1994, Cheatgrass demography-establishment attributes, recruitment, ecotypes, and genetic variability: U.S. Department of Agriculture, Forest Service, Intermountain Research Station General Technical Report INT-GTR-313, p. 12-21.
Ecological significance of seed banks with special reference to alien annuals
Pyke, D.A., 1994, Ecological significance of seed banks with special reference to alien annuals: U.S. Department of Agriculture, Forest Service, General Technical Report INT-GTR-313, p. 197-201.
Successional theory and the desired plant community approach
Borman, M.M., Pyke, D.A., 1994, Successional theory and the desired plant community approach: Rangelands, v. 16, no. 2, p. 82-84.
Problem analysis for the Vegetation Diversity Project - A research and demonstration program to restore and maintain native plant diversity on deteriorated rangelands of the Great Basin and Columbia Plateau
Pyke, D.A., Borman, M.M., 1993, Problem analysis for the Vegetation Diversity Project - A research and demonstration program to restore and maintain native plant diversity on deteriorated rangelands of the Great Basin and Columbia Plateau: US, Bureau of Land Management, Oregon State Office Technical Note OR-936-01, p. 100.
Statistical analysis of survival, and removal rate experiments
Pyke, D.A., Thompson, J.N., 1986, Statistical analysis of survival, and removal rate experiments: Ecology, no. 67, p. 240-245.