Abstract
The invasive species Bromus tectorum L. is recognized as one of the most ecologically and economically devastating weeds in the western United States. Although B. tectorum has been studied extensively, few studies have examined its dispersal and spread. We collected data from sites with B. tectorum in and around Rocky Mountain National Park to quantify the relationships between plant cover/density and seed rain and dispersal distance. Results suggest that there is a positive relationship between density within a patch and local seed rain and that B, tectorum exhibits relatively limited short-distance dispersal (where seeds fell in close proximity to plants and no seeds were found to have dispersed more than 0.1 m from the edge of a patch). These data can inform modelers and managers who are attempting to better understand population dynamics and options for controlling this species.
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