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Wolves trigger a trophic cascade to berries as alternative food for grizzly bears
William J Ripple1, Robert L Beschta1, Jennifer K Fortin2
1Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR, 97331, USA.
Abstract:
This is a Forum article in response to: Barber-Meyer, S. (2015) Trophic cascades from wolves to grizzly bears or changing abundance of bears and alternate foods? Journal of Animal Ecology, 83, doi: 10.1111/1365-2656.12338. We used multiple data sets and study areas as well as several lines of evidence to investigate potential trophic linkages in Yellowstone National Park. Our results suggest that a trophic cascade from wolves to elk to berry production to berry consumption by grizzly bears may now be underway in the Park.
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