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: 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.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 (FRESC), 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.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.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.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.
Year Published: 2007
Biotic soil crusts in relation to topography, cheatgrass, and fire in the Columbia Basin, Washington
We studied lichen and bryophyte soil crust communities in a large public grazing allotment within a sagebrush steppe ecosystem in which the biotic soil crusts are largely intact. The allotment had been rested from grazing for 12 years, but experienced an extensive series of wildfires. In the 350, 4 ?? 0.5 m plots, stratified by topographic...
Ponzetti, Jeanne; McCune, B.; Pyke, David A.View Citation
Biotic soil crusts in relation to topography, cheatgrass, and fire in the Columbia Basin, Washington; 2007; Article; Journal; Bryologist; Ponzetti, Jeanne; McCune, B.; Pyke, David A.
Year Published: 2007
Monitoring post-fire vegetation rehabilitation projects: A common approach for non-forested ecosystems
Emergency Stabilization and Rehabilitation (ES&R) and Burned Area Emergency Response (BAER) treatments are short-term, high-intensity treatments designed to mitigate the adverse effects of wildfire on public lands. The federal government expends significant resources implementing ES&R and BAER treatments after wildfires; however, recent...
Wirth, Troy A.; Pyke, David A.View Citation
Monitoring Post-Fire Vegetation Rehabilitation Projects: A Common Approach for Non-Forested Ecosystems; 2007; SIR; 2006-5048; Wirth, Troy A.; Pyke, David A.
Year Published: 2006
Multi-scale responses of soil stability and invasive plants to removal of non-native grazers from an arid conservation reserve
Disturbances and ecosystem recovery from disturbance both involve numerous processes that operate on multiple spatial and temporal scales. Few studies have investigated how gradients of disturbance intensity and ecosystem responses are distributed across multiple spatial resolutions and also how this relationship changes through time during...
Beever, Erik A.; Huso, Manuela M. P.; Pyke, David A.
Year Published: 2005
Available nitrogen: A time-based study of manipulated resource islands
Spatial and temporal heterogeneity of available nitrogen are critical determinants of the distribution and abundance of plants and animals in ecosystems. Evidence for the resource island theory suggests that soils below tree and shrub canopies contain higher amounts of resources, including available nitrogen, than are present in interspace areas....
Stubbs, Michelle M.; Pyke, David A.View Citation
Available nitrogen: a time-based study of manipulated resource islands; 2005; Article; Journal; Plant and Soil; Stubbs, Michelle M.; Pyke, David A.
Year Published: 2005
Establishing native grasses in a big sagebrush-dominated site: an intermediate restoration step
Many semiarid rangelands in the Great Basin, U.S.A., are shifting dominance to woody species as a consequence of land degradation including intense livestock grazing and fire suppression. Whereas past rehabilitation efforts in Big sagebrush (Artemisia tridentata) steppes removed the shrub and added introduced forage grasses to successfully shift...
Huber-Sannwald, Elisabeth; Pyke, David A.View Citation
Establishing native grasses in a big sagebrush-dominated site: an intermediate restoration step; 2005; Article; Journal; Restoration Ecology; Huber-Sannwald, Elisabeth; Pyke, David A.
Year Published: 2005
Monitoring temporal change in riparian vegetation of Great Basin National Park
Disturbance in riparian areas of semiarid ecosystems involves complex interactions of pulsed hydrologic flows, herbivory, fire, climatic effects, and anthropogenic influences. We resampled riparian vegetation within ten 10-m × 100-m plots that were initially sampled in 1992 in 4 watersheds of the Snake Range, east central Nevada. Our finding...
Beever, Erik A.; Pyke, David A.; Chambers, Jeanne C.; Landau, Fred; Smith, S.D.Attribution: Northern Rocky Mountain Science Center (NOROCK), Forest and Rangeland Ecosystem Science Center (FRESC), Ecosystems,
View Citation
Monitoring temporal change in riparian vegetation of Great Basin National Park; 2005; Article; Journal; Western North American Naturalist; Beever, Erik A.; Pyke, David A.; Chambers, Jeanne C.; Landau, Fred; Smith, S. D.
Year Published: 2005
Plant invaders, global change and landscape restoration
Modifications in land uses, technology, transportation and biogeochemical cycles currently influence the spread of organisms by reducing the barriers that once restricted their movements. We provide an overview of the spatial and temporal extent for agents of environmental change (land and disturbance transformations, biogeochemical modifications...
Pyke, D.A.; Knick, S.T.View Citation
Plant invaders, global change and landscape restoration; 2005; Conference Paper; African Journal of Range and Forage Science; Pyke, D. A.; Knick, S. T.
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.