Environmental factors associated with cheatgrass invasion in the Gunnison Basin, Colorado
Cheatgrass (Bromus tectorum L.) has invaded vast areas of sagebrush (Artemisia tridentata Nutt.) dominated rangeland throughout the western U.S. In the high-elevation, semi-desert, sagebrush ecosystem of the Gunnison Basin, cheatgrass infestations are primarily restricted to disturbed sites. I conducted observational and experimental studies to evaluate: 1) the range of a viable seedbank from the edge of cheatgrass patches into the native communities, 2) the differences in soil characteristics under the cheatgrass invaded and uninvaded communities, and 3) the effects of surface soil disturbance, ...
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