International Journal of Wildland Fire International Journal of Wildland Fire Society
Journal of the International Association of Wildland Fire

Fire history in ponderosa pine landscapes of Grand Canyon National Park: is it reliable enough for management and restoration?

William L. Baker
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- Author Affiliations

Ecology Program and Department of Geography, University of Wyoming Department 3371, 1000 E. University Ave, Laramie, WY 82071, USA. Email:

International Journal of Wildland Fire 15(3) 433-437
Submitted: 6 September 2004  Accepted: 14 June 2005   Published: 5 September 2006


Reconstructing fire regimes of the past can provide a valuable frame of reference for understanding the impact of human land uses on contemporary fire and forest structure, but methods for reconstructing past fire regimes are under re-evaluation. In the present article, a common method of characterizing surface fire regimes, using composite fire intervals from fire scars, is shown to significantly underestimate the length of the fire rotation and population mean fire interval in Grand Canyon landscapes where these parameters are known. Also, the evidence and interpretation that past high-severity fire was uncommon in ponderosa pine landscapes in Grand Canyon National Park are challenged. Together, these two concerns mean that an alternative characterization of the fire regime, which has very different implications, cannot be excluded. Management aimed at lowering fire risk, as a means of restoration, does not presently have a sound scientific basis, if it uses the composite fire interval as a measure of the fire regime or is based on fire history research that lacks adequate analysis of past high-severity fire.


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