Responses of exotic plant species to fires in Pinus ponderosa forests in northern Arizona
Article first published online: 24 FEB 2009
2001 IAVS - the International Association of Vegetation Science
Journal of Vegetation Science
Volume 12, Issue 2, pages 261–268, April 2001
How to Cite
Crawford, J. A., Wahren, C.-H.A., Kyle, S. and Moir, W.H. (2001), Responses of exotic plant species to fires in Pinus ponderosa forests in northern Arizona. Journal of Vegetation Science, 12: 261–268. doi: 10.2307/3236610
- Issue published online: 24 FEB 2009
- Article first published online: 24 FEB 2009
- Received 6 April 2000; Revision received 6 October 2000; Accepted 22 November 2000.
- Fire severity;
- Anon. (1999)
Abstract. Changes in disturbance due to fire regime in southwestern Pinus ponderosa forests over the last century have led to dense forests that are threatened by widespread fire. It has been shown in other studies that a pulse of native, early-seral opportunistic species typically follow such disturbance events. With the growing importance of exotic plants in local flora, however, these exotics often fill this opportunistic role in recovery. We report the effects of fire severity on exotic plant species following three widespread fires of 1996 in northern Arizona P. ponderosa forests. Species richness and abundance of all vascular plant species, including exotics, were higher in burned than nearby unburned areas. Exotic species were far more important, in terms of cover, where fire severity was highest. Species present after wildfires include those of the pre-disturbed forest and new species that could not be predicted from above-ground flora of nearby unburned forests.