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Date: 2009-10-08 16:55:21Yellowstone National Park Wolf reintroduction Trophic cascade Ripple Elk Gray wolf Trophic level Ecology Defenders of Wildlife Biology Zoology Predation | Ripple receives Spirit of Defenders Award for ScienceAdd to Reading ListSource URL: www.cof.orst.eduDownload Document from Source WebsiteFile Size: 28,18 KBShare Document on Facebook |