Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS

Episodes
Dangerous Catch Dirty Secrets Additional Episodes
border
TV Schedules About the Project For Educators Feedback border
border
National Geographic's Strange Days on Planet Earth
Get Involved
Little changes... with big results. border
border
PREDATORS
border Why Should I Care? border border

5 Reasons Why

Why Others Care
border What Do Experts Say? border border

From the Episode

Related Stories

Resources
border How Do I Measure Up? border border

Tools You Can Use

Interactive House
border What Can I Do? border border

Get Out There

Idea Exchange

Please note that links marked with Off-site Link are off-site links and will open in a new browser window.

PBS's Terms of Use.

William J. Ripple, PhD
Ecologist

I received a BS in 1974 from South Dakota State University, an MS in 1978 from the University of Idaho and a PhD in 1984 from Oregon State University. After graduating in 1984, I joined the faculty at Oregon State University. I am currently a professor in the Department of Forest Resources as well as the Director of the Environmental Remote Sensing Applications Laboratory (ERSAL). My research interests include aspen, elk and wolf ecology, wildlife habitat analysis, landscape ecology and spatial analysis.

During the last six years I have been working in Yellowstone National Park studying the effects of wolf reintroduction on the ecosystem. My current studies are focused on the effects of elk browsing on aspen and willow and how the presence of wolves changes elk foraging patterns. I chose my profession because of my commitment to help develop ways to sustain Earth's ecosystems and my love of nature and the outdoors.


Relevant Publications

Ripple, W. J., Larsen, E.J., Renkin, R.A. and Smith, D.W. (2001). Trophic Cascades among Wolves, Elk, and Aspen on Yellowstone National Park's Northern Range. Biological Conservation, 102, 227-334.

Ripple, W.J., and Larsen, E.J. (2000). Historic Aspen Recruitment, Elk, and Wolves in Northern Yellowstone National Park, USA. Biological Conservation, 95, 361-370.


Site Credits   |   Privacy Policy
© Copyright National Geographic Television & Film. All rights reserved.