Search Constraints

Start Over
Filtering by: Subject Elk Remove constraint Subject: Elk Committee Member Doescher, Paul S. Remove constraint Committee Member: Doescher, Paul S.

Search Results

  • Complexity of food web interactions in a large mammal system

    Creator:
    Eisenberg, Cristina
    Abstract:
    Food webs consist of a combination of bottom-up (resource-driven) and top-down (predator-driven) effects. The strength of these effects depends on the context in which they occur. I investigated food web (trophic) relationships between wolf (Canis lupus) predation, elk (Cervus elaphus) herbivory, aspen (Populus tremuloides Michaux) recruitment, and fire. The study...
    Resource Type:
    Dissertation
    Full Text:
    occur. I investigated food web (trophic) relationships between wolf (Canis lupus) predation, elk

  • 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:
    Gallatin elk winter range of Southwestern Montana, USA AN ABSTRACT OF THE DISSERTATION OF

  • 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:
    herbivory on elk winter ranges. To investigate changes in aspen stands in northern Yellowstone since the