William J. Ripple

Professor
Director, Environmental Remote Sensing Applications Laboratory (ERSAL)

Peavy Hall 011
Oregon State University
Corvallis, OR 97331

• Office: 011 Peavy Hall
• Phone: 541-737-3056
• Fax: 541-737-1393

• B.S., 1974, South Dakota State University
• M.S., 1978, University of Idaho
• Ph.D., 1984, Oregon State University

• FOR 421/521 - Spatial Analysis of Forest Landscapes
• FOR 599 - Aldo Leopold and Ecosystem Management
• FOR/FW 547 - Trophic Cascades

Wold, ungulate, aspen ecology; trophic cascades; remote sensing of vegetation; fire ecology; geographic information systems; wildlife habitat analysis; landscape ecology; biodiversity; historical ecology.

• The Leopold Project - The goal of Leopold Project is to continue the work Aldo Leopold started on topics that intersect forestry and wildlife science and ecosystems especially predators, ungulates, and forests.
• The Aspen Project - An interactive web page designed to examine the decline of Quaking Aspen throughout the western United States. This site has had 13,000 hits since 1998.
• The Lewis and Clark Project - Wildlife along the Lewis & Clark Trail studying human wildlife associations as a study in historical ecology.
• The Wolves in Nature Project - The purpose here is to investigate the role of a top predator, the gray wolf (Canis Lupus), in structuring ecological communities.
• Species Range Contractions - The purpose of this study is to compare historic and current ranges of both carnivores and ungulates, identify large-scale patterns in species ranges and determine the degree of human influence on species range changes.

• Cristina Eisenberg - PhD, Forestry and Wildlife
• Jeff Hollenbeck - PhD, Remote Sensing/GIS/Landscape Ecology
• Josh Halofsky - PhD, Remote Sensing/GIS/Landscape Ecology
• Trent Seager - MS, Effects of Deer and Elk Herbivory and Conifer Encroachment on Aspen Stands in Western Oregon

1. Halofsky, J.S. Ripple W.J. and Beschta, R.L. 2008. Recoupling fire and aspen recruitment after wolf reintroduction in Yellowstone National Park, USA. In press.
2. Beschta, R.L. and Ripple, W.J. 2008. Restoring northern Yellowstone’s Riparian Plant Communities with Wolves. Restoration Ecology. In press
3. Beschta, R.L. and Ripple, W.J. 2008. Wolves, trophic cascades, and rivers in western Olympic National Park. Ecohydrology. In press
4. Ripple, W.J. and Beschta, R.L. 2008. Trophic cascades involving cougar, mule deer, and black oaks in Yosemite National Park. Biological Conservation. 141: 1249-1256.
5. Hollenbeck, J. P., and Ripple W.J. 2008. Aspen snag dynamics, cavity-nesting birds, and trophic cascades in Yellowstone's northern range. Forest Ecology and Management. 255:1095-1103.
6. Halofsky, J.S. and Ripple W.J. 2008. Linkages between wolf presence and aspen recruitment in the Gallatin elk winter range of southwestern Montana, USA. Forestry. 81:195-207.
7. Halofsky, J.S. and Ripple W.J. 2008. Fine-scale predation risk on elk after wolf-reintroduction in Yellowstone National Park, USA. Oecologia. 155:869–877.
8. Beschta, R.L. and Ripple, W.J. 2007. Increased willow heights along northern Yellowstone’s Blacktail Deer Creek following wolf reintroduction. Western North American Naturalist 67:613-617.
9. Hollenbeck, J. P., and Ripple W.J. 2007. Aspen and conifer heterogeneity effects on bird diversity in the northern Yellowstone ecosystem. Western North American Naturalist 67:92-101.
10. Ripple, W.J. and Beschta, R.L. 2007. Restoring Yellowstone's aspen with wolves. Biological Conservation 138: 514-519.
11. Beschta, R.L. and Ripple W.J. 2007. Wolves, elk, and aspen in the winter range of Jasper National Park, Canada. Canadian Journal of Forest Research. 37(10): 1873-1885.
12. Hollenbeck, J. P., and Ripple W.J. 2007. Aspen patch and migratory bird relationships in the northern Yellowstone ecosystem. Landscape Ecology 22:1411-1425.
13. Ripple W.J., Beschta R.L. 2007. Hardwood tree decline following the loss of large carnivores on the Great Plains, USA. Frontiers in Ecology and the Environment in press. 5:241-246.