Changes in fire regimens are another form of facilitation. "Bromus tectorum", originally from Eurasia, is highly fire-adapted. It not only spreads rapidly after burning but also increases the frequency and intensity (heat) of fires by providing large amounts of dry detritus during the fire season in western North America. In areas where it is widespread, it has altered the local fire regimen so much that native plants cannot survive the frequent fires, allowing "B. tectorum" to further extend and maintain dominance in its introduced range.