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: 2010
National ecosystem assessments supported by scientific and local knowledge
An understanding of the extent of land degradation and recovery is necessary to guide land-use policy and management, yet currently available land-quality assessments are widely known to be inadequate. Here, we present the results of the first statistically based application of a new approach to national assessments that integrates scientific and...
Herrick, Jeffrey E.; Lessard, Veronica C.; Spaeth, Kenneth E.; Shaver, Patrick L.; Dayton, Robert S.; Pyke, David A.; Jolley, Leonard; Goebel, J. JefferyAttribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
Year Published: 2010
Assessing transportation infrastructure impacts on rangelands: test of a standard rangeland assessment protocol
Linear disturbances associated with on- and off-road vehicle use on rangelands has increased dramatically throughout the world in recent decades. This increase is due to a variety of factors including increased availability of all-terrain vehicles, infrastructure development (oil, gas, renewable energy, and ex-urban), and recreational activities....
Duniway, Michael C.; Herrick, Jeffrey E.; Pyke, David A.; Toledo, DavidAttribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
Assessing transportation infrastructure impacts on rangelands: test of a standard rangeland assessment protocol; 2010; Article; Journal; Rangeland Ecology and Management; Duniway, Michael C.; Herrick, Jeffrey E.; Pyke, David A.; Toledo, David
Year Published: 2010
Yield responses of ruderal plants to sucrose in invasive-dominated sagebrush steppe of the northern Great Basin
Restoration of sagebrush-steppe plant communities dominated by the invasive ruderals Bromus tectorum (cheatgrass) and Taeniatherum caput-medusae (medusahead) can be facilitated by adding carbon (C) to the soil, stimulating microbes to immobilize nitrogen (N) and limit inorganic N availability. Our objectives were to determine responses in (1)...
Brunson, Jessi; Pyke, David A.; Perakis, Steven S.Attribution: Forest and Rangeland Ecosystem Science Center, Ecosystems, Sage-grouse & Sagebrush Ecosystem
View Citation
Yield Responses of Ruderal Plants to Sucrose in Invasive-Dominated Sagebrush Steppe of the Northern Great Basin; 2010; Article; Journal; Restoration Ecology; Brunson, J. L.; Pyke, D. A.; Perakis, S. S.
Year Published: 2009
Final Report for Emergency Stabilization and Rehabilitation Treatment Monitoring of the Keeney Pass, Cow Hollow, Double Mountain, and Farewell Bend Fires
A strategy for monitoring post-fire seedings in the sagebrush steppe of the Intermountain West was developed and used to monitor four example fires in the Vale, Oregon District of the Bureau of Land Management (BLM). We began to develop a potential approach by (1) reviewing previous vegetation monitoring manuals produced by the Federal government...
Wirth, Troy A.; Pyke, David A.Attribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
Final Report for Emergency Stabilization and Rehabilitation Treatment Monitoring of the Keeney Pass, Cow Hollow, Double Mountain, and Farewell Bend Fires; 2009; OFR; 2009-1152; Wirth, Troy A.; Pyke, David A.
Year Published: 2009
Investigating Seed Longevity of Big Sagebrush (Artemisia tridentata)
The Intermountain West is dominated by big sagebrush communities (Artemisia tridentata subspecies) that provide habitat and forage for wildlife, prevent erosion, and are economically important to recreation and livestock industries. The two most prominent subspecies of big sagebrush in this region are Wyoming big sagebrush (A. t. ssp. wyomingensis...
Wijayratne, Upekala C.; Pyke, David A.Attribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
Investigating Seed Longevity of Big Sagebrush (Artemisia tridentata); 2009; OFR; 2009-1146; Wijayratne, Upekala C.; Pyke, David A.
Year Published: 2009
A Chronosequence Feasibility Assessment of Emergency Fire Rehabilitation Records within the Intermountain Western United States - Final Report to the Joint Fire Science Program - Project 08-S-08
Department of the Interior (DOI) bureaus have invested heavily (for example, the U.S. Bureau of Land Management (BLM) spent more than $60 million in fiscal year 2007) in seeding vegetation for emergency stabilization and burned area rehabilitation of non-forested arid lands over the past 10 years. The primary objectives of these seedings commonly...
Knutson, Kevin C.; Pyke, David A.; Wirth, Troy A.; Pilliod, David S.; Brooks, Matthew L.; Chambers, Jeanne C.Attribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
A Chronosequence Feasibility Assessment of Emergency Fire Rehabilitation Records within the Intermountain Western United States - Final Report to the Joint Fire Science Program - Project 08-S-08; 2009; OFR; 2009-1099; Knutson, Kevin C.; Pyke, David A.; Wirth, Troy A.; Pilliod, David S.; Brooks, Matthew L.; Chambers, Jeanne C.
Year Published: 2009
Fire rehabilitation effectiveness: a chronosequence approach for the Great Basin
Federal land management agencies have invested heavily in seeding vegetation for emergency stabilization and rehabilitation (ES&R) of non-forested lands. ES&R projects are implemented to reduce post-fire dominance of non-native annual grasses, minimize probability of recurrent fire, quickly recover lost habitat for sensitive species,...
Pyke, David A.; Pilliod, David S.; Chambers, Jeanne C.; Brooks, Matthew L.; Grace, JamesAttribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
Fire rehabilitation effectiveness: a chronosequence approach for the Great Basin; 2009; Federal Government Series; Pyke, David A.; Pilliod, David S.; Chambers, Jeanne C.; Brooks, Matthew L.; Grace, James
Year Published: 2009
A spatial model to prioritize sagebrush landscapes in the intermountain west (U.S.A.) for restoration
The ecological integrity of Sagebrush (Artemisia spp.) ecosystems in the Intermountain West (U.S.A.) has been diminished by synergistic relationships among human activities, spread of invasive plants, and altered disturbance regimes. An aggressive effort to restore Sagebrush habitats is necessary if we are to stabilize or improve current habitat...
Meinke, C.W.; Knick, S.T.; Pyke, D.A.Attribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
A spatial model to prioritize sagebrush landscapes in the intermountain west (U.S.A.) for restoration; 2009; Article; Journal; Restoration Ecology; Meinke, C. W.; Knick, S. T.; Pyke, D. A.
Year Published: 2008
Interactions among livestock grazing, vegetation type, and fire behavior in the Murphy Wildland Fire Complex in Idaho and Nevada, July 2007
A series of wildland fires were ignited by lightning in sagebrush and grassland communities near the Idaho-Nevada border southwest of Twin Falls, Idaho in July 2007. The fires burned for over two weeks and encompassed more than 650,000 acres. A team of scientists, habitat specialists, and land managers was called together by Tom Dyer, Idaho BLM...
Launchbaugh, Karen; Brammer, Bob; Brooks, Matthew L.; Bunting, Stephen C.; Clark, Patrick; Davison, Jay; Fleming, Mark; Kay, Ron; Pellant, Mike; Pyke, David A.Attribution: Earth Resources Observation and Science (EROS) Center, Forest and Rangeland Ecosystem Science Center, Ecosystems, Earth Resources Observation and Science Center
View Citation
Interactions Among Livestock Grazing, Vegetation Type, and Fire Behavior in the Murphy Wildland Fire Complex in Idaho and Nevada, July 2007; 2008; OFR; 2008-1214; Launchbaugh, Karen; Brammer, Bob; Brooks, Matthew L.; Bunting, Stephen; Clark, Patrick; Davison, Jay; Fleming, Mark; Kay, Ron; Pellant, Mike; Pyke, David A.
Year Published: 2008
Defoliation effects on Bromus tectorum seed production: Implications for grazing
Cheatgrass (Bromus tectorum L.) is an invasive annual grass that creates near-homogenous stands in areas throughout the Intermountain sagebrush steppe and challenges successful native plant restoration in these areas. A clipping experiment carried out at two cheatgrass-dominated sites in eastern Oregon (Lincoln Bench and Succor Creek) evaluated...
Hempy-Mayer, K.; Pyke, D.A.Attribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
Defoliation effects on Bromus tectorum seed production: Implications for grazing; 2008; Article; Journal; Rangeland Ecology and Management; Hempy-Mayer, K.; Pyke, D. A.
Year Published: 2008
Is Rangeland Health Relevant to Mongolia?
DOI: 10.2111/1551-501X(2008)30[25:IRHRTM]2.0.CO;2
Damdinsuren, Bolormaa; Herrick, J.E.; Pyke, David A.; Havstad, K.M.Attribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
Is Rangeland Health Relevant to Mongolia?; 2008; Article; Journal; Rangelands; Damdinsuren, Bolormaa; Herrick, J. E.; Pyke, David A.; Havstad, K. M.
Year Published: 2008
Western juniper and ponderosa pine ecotonal climate-growth relationships across landscape gradients in southern Oregon
Forecasts of climate change for the Pacific northwestern United States predict warmer temperatures, increased winter precipitation, and drier summers. Prediction of forest growth responses to these climate fluctuations requires identification of climatic variables limiting tree growth, particularly at limits of free species distributions. We...
Knutson, K.C.; Pyke, D.A.Attribution: Forest and Rangeland Ecosystem Science Center, Ecosystems
View Citation
Western juniper and ponderosa pine ecotonal climate-growth relationships across landscape gradients in southern Oregon; 2008; Article; Journal; Canadian Journal of Forest Research; Knutson, K. C.; Pyke, D. 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.