Ripple, W.J., and Beschta, R.L. Trophic cascades involving cougar, mule deer, and black oaks in Yosemite National Park Biological Conservation 141(5), May 2008: 1249-1256.
Ripple, W.J. and Beschta, R.L. Linking a cougar decline, trophic cascade, and catastrophic regime shift in Zion National Park. Biological Conservation 133, 2006: 397-408.
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