Does elevated atmospheric CO2 favor cheatgrass?

Several studies found that increased atmospheric CO2 concentrations resulted in increased cheatgrass (Bromus tectorum), when soil water and nutrients were not limiting establishment and growth (Hungate et al. 1996; Larigauderie et al. 1988; Nowak et al. 2004).

Wyoming big sagebrush/cheatgrass on the east slope of the Pueblo Mts, Steens mountain in the background (Photo by Rick Miller, Oregon State University).