The Effects of Wildlife Ungulate Herbivory Upon Riparian and Stream Ecosystems within the Greater Yellowstone Area

Abstract

This study will investigate the effects of wildlife ungulate herbivory, principally of elk and moose, upon riparian and stream habitats within the Greater Yellowstone Ecosystem, which encompasses both the Grand Teton National Park and the Yellowstone National Park. The emphasis of the research will concern how these effects express themselves within the aquatic macroinvertebrate community. Sampling conducted in August and October of 1996 revealed that sites subject to moderate and minimal herbivore use contain greater quantities of allochthonous material and a more diverse macroinvertebrate trophic structure than streams incurring heavy herbivore use.