La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Vegetation response to a short interval between high-severity wildfires in a mixed-evergreen forest
Auteurs :	Daniel C. Donato, Auteur ; Joseph B. Fontaine, Auteur ; W. Douglas Robinson, Auteur ; J. Boone Kauffman, Auteur ; Beverly E. Law, Auteur
Type de document :	Article
Dans :	Journal of Ecology (97(1) JAN 2009)
Article en page(s) :	142-154
Langues:	Anglais
Résumé :	1. Variations in disturbance regime strongly influence ecosystem structure and function. A prominent form of such variation is when multiple high-severity wildfires occur in rapid succession (i.e. short-interval (SI) severe fires, or 're-burns'). These events have been proposed as key mechanisms altering successional rates and pathways. 2. We utilized a natural experiment afforded by two overlapping wildfires occurring within a 15-year interval in forests of the Klamath-Siskiyou Mountains, Oregon (USA). We tested for unique effects of a SI fire (15-year interval before 2002 fire) by comparing vegetation communities 2 years post-fire to those following a long-interval (LI) fire (> 100-year interval before 2002 fire) and in mature/old-growth (M/OG) stands (no high-severity fire in > 100-year). 3. Nearly all species found in M/OG stands were present at similar relative abundance in both the LI and SI burns, indicating high community persistence through multiple high-severity fires. However, the

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