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: 2002
Research plan for lands administered by the U.S. Department of the Interior in the Interior Columbia Basin and Snake River Plateau
This document presents a long-term research strategy designed to address current and future research needs for management of Department of the Interior-administered ecosystems in the Intermountain West. Although the research plan was developed in the context of the Interior Columbia Basin Ecosystem Management Project, the plan addresses many high-...
Beever, Erik A.; Pyke, David A.Attribution: Alaska Science Center, Forest and Rangeland Ecosystem Science Center (FRESC), Ecosystems, Region 11: Alaska
View Citation
Research Plan for Lands Administered by the U.S. Department of the Interior in the Interior Columbia Basin and Snake River Plateau; 2002; USGS Unnumbered Series; ITR; 2002-0003; Beever, Erik A.; Pyke, David A.
Year Published: 2002
Strategic plan for the Coordinated Intermountain Restoration Project
In 1982, the Bureau of Land Management’s (BLM) Idaho State Office began the Intermountain Greenstripping and Rehabilitation Research Project (IGRRP), or the “Greenstripping Program,” to investigate plant materials and technologies that can reduce wildfire incidence and improve rehabilitation practices. Rehabilitation is normally applied as a...
Pyke, David A.; Pellant, Michael L.View Citation
Strategic Plan for the Coordinated Intermountain Restoration Project; 2002; Federal Government Series; ITR; 2002-0011; Pyke, David A.; Pellant, Michael L.
Year Published: 2001
Ramet spacing of Elymus lanceolatus (thickspike wheatgrass) in response to neighbor density
Many plants exploit patchy resources through clonal foraging. Plants established in field plots were used to determine if Elymus lanceolatus ssp. lanceolatus (Scribner et J.G. Smith) Gould (thickspike wheatgrass) showed a clonal foraging response to neighbour densities, as it had previously shown to patchy soil nutrients. Neighbours consisted of...
Humphrey, L.D.; Pyke, David A.View Citation
Ramet spacing of Elymus lanceolatus (thickspike wheatgrass) in response to neighbor density; 2001; Article; Journal; Canadian Journal of Botany; Humphrey, L. D.; Pyke, David A.
Year Published: 1998
An enthusiast's guide to agrostology
Book review of: Population Biology of Grasses, edited by G.P. Cheplick; Cambridge University Press, 1998. £50.00/$85.00 hbk (xii +399 pages) ISBN 0 521 57205 3
Pyke, David A.
Year Published: 1998
Demographic and growth responses of a guerrilla and a phalanx perennial grass in competitive mixtures
The advantages of guerrilla and phalanx growth for the guerrilla Elymus lanceolatus ssp. lanceolatus and phalanx E. l. ssp. wawawaiensis were evaluated over 2 years in two taxon mixtures with a range of densities of each subspecies and under two levels of watering. Ramet numbers and biomass of the guerrilla subspecies were higher than those of...
Humphrey, L. David; Pyke, David A.View Citation
Demographic and growth responses of a guerrilla and a phalanx perennial grass in competitive mixtures; 1998; Article; Journal; Journal of Ecology; Humphrey, David L.; Pyke, David A.
Year Published: 1998
Effects of nutrient patches and root systems on the clonal plasticity of a rhizomatous grass
Clonal plant foraging has been examined primarily on individual clones exposed to resource-poor and resource-rich environments. We designed an experiment to examine the clonal foraging behavior of the rhizomatous grass Elymus lanceolatus ssp. lanceolatus under the influence of neighboring plant root systems in a heterogeneous nutrient environment...
Huber-Sannwald, Elisabeth; Pyke, David A.; Caldwell, M.M.; Durham, S.View Citation
Effects of nutrient patches and root systems on the clonal plasticity of a rhizomatous grass; 1998; Article; Journal; Ecology; Huber-Sannwald, Elisabeth; Pyke, David A.; Caldwell, M. M.; Durham, S.
Year Published: 1998
Variability in seed dormancy of three Pacific Northwestern grasses
No abstract available.
Trask, Melinda M.; Pyke, David A.View Citation
Variability in seed dormancy of three Pacific Northwestern grasses; 1998; Article; Journal; Seed Science and Technology; Trask, Melinda M.; Pyke, David A.
Year Published: 1997
Clonal foraging in perennial wheatgrasses: A strategy for exploiting patchy soil nutrients
1. Foraging by means of plasticity in placement of tillers in response to low- and high-nutrient patches was examined in the rhizomatous wheatgrass Elymus lanceolatus ssp. lanceolatus. Its ability to exploit soil nutrient patches was compared to that of the closely related but caespitose E. lanceolatus ssp. wawawaiensis.2. Clones of 14 genets of...
Humphrey, L. David; Pyke, David A.View Citation
Clonal foraging in perennial wheatgrasses: A strategy for exploiting patchy soil nutrients; 1997; Article; Journal; Journal of Ecology; Humphrey, L. D.; Pyke, David A.
Year Published: 1997
Mixed-density designs for evaluating plant interactions during revegetation
No abstract available.
Francis, Mark G.; Pyke, David A.View Citation
Mixed-density designs for evaluating plant interactions during revegetation; 1997; Article; Journal; Rangelands; Francis, Mark G.; Pyke, David A.
Year Published: 1997
Perception of neighboring plants by rhizomes and roots: morphological manifestations of a clonal plant
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...
Huber-Sannwald, Elisabeth; Pyke, David A.; Caldwell, M.M.View Citation
Perception of neighboring plants by rhizomes and roots: morphological manifestations of a clonal plant; 1997; Article; Journal; Canadian Journal of Botany; Huber-Sannwald, Elisabeth; Pyke, David A.; Caldwell, M. M.
Year Published: 1996
Crested wheatgrass-cheatgrass seedling competition in a mixed-density design
Plant competition experiments have historically used designs that are difficult to interpret due to confounding problems. Recently, designs based on a 'response function' approach have been proposed and tested in various plant mixture settings. For this study, 3 species were used that are important in current revegetation practices in the...
Francis, Mark G.; Pyke, David A.View Citation
Crested wheatgrass-cheatgrass seedling competition in a mixed-density design; 1996; Article; Journal; Journal of Range Management; Francis, Mark G.; Pyke, David A.
Year Published: 1996
Morphological plasticity following species-specific recognition and competition in two perennial grasses
Huber-Sannwald, Elisabeth; Pyke, David A.; Caldwell, M.M.View Citation
Morphological plasticity following species-specific recognition and competition in two perennial grasses; 1996; Article; Journal; American Journal of Botany; Huber-Sannwald, Elisabeth; Pyke, David A.; Caldwell, M. M.
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.