Document Type

Conference Proceeding

Abstract

The community composition and population structure of the woody riparian vegetation in Great Basin National Park are described. Community analyses were accomplished by sampling 229 plots along an elevational gradient of 8 major stream systems in the Park. TWINSPAN analysis identified 4 primary species groups that were characterized by Populus tremuloides (aspen), Abies concolor (white fir), Rosa woodsii (Woods rose), and Populus angustifolia (narrowleaf cottonwood) as dominants, respectively. Detrended Correspondence Analysis (DECORANA) showed that the most important environmental factors associated with the distribution of species were elevation and slope, with flood-related physiographic factors having a secondary effect. Analysis of size-class distributions of the four major riparian tree species in the Park indicated that each dominant shows good recruitment on most watersheds. Overgrazing by domestic livestock and stream diversion are the two primary disturbance factors affecting riparian vegetation in Great Basin National Park.

Disciplines

Desert Ecology | Environmental Health and Protection | Environmental Monitoring | Terrestrial and Aquatic Ecology