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  • Trophic cascades and large mammals in the Yellowstone ecosystem

    Creator:
    Painter, Luke E.
    Abstract:
    Reintroduction of wolves to Yellowstone National Park (YNP) in 1995-96 provided a rare opportunity to observe the response of an ecosystem to the return of a top predator, including possible reversal of decades of decline of aspen, cottonwood, and tall willows suppressed by intensive herbivory on elk winter ranges. To...
    Resource Type:
    Dissertation
    Full Text:
    ............................... 59
 5.
 EFFECTS OF BISON ON WILLOW AND COTTONWOOD IN NORTHERN YELLOWSTONE NATIONAL PARK

  • Evidence of a trophic cascade among wolves, elk, and aspen in Yellowstone National Park, USA

    Creator:
    Halofsky, Joshua S.
    Abstract:
    According to general top-down trophic theory, in the presence of carnivores, herbivore behavior and/or densities could change and result in an overall decrease in herbivory on plant communities. In this dissertation, I examined the potential relationship between gray wolf (Canis lupus) presence and absence on elk (Cervus elaphus) herbivory of...
    Resource Type:
    Dissertation
    Full Text:
    the Gallatin elk winter range of northwestern Yellowstone National Park, USA. From aspen data, I