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Drought, tree mortality, and wildfire in forests adapted to frequent fire

Author(s): Scott L. Stephens, Brandon M. Collins, Christopher J. Fettig, Mark A. Finney, Chad M. Hoffman, Eric E. Knapp, Malcolm P. North, Hugh Safford, Rebecca Bewley Wayman
Year Published: 2018

Massive tree mortality has occurred rapidly in frequent-fire-adapted forests of the Sierra Nevada, California. This mortality is a product of acute drought compounded by the long-established removal of a key ecosystem process: frequent, low- to moderate-intensity fire. The recent tree mortality has many implications for the future of these forests and the ecological goods and services they provide to society. Future wildfire hazard following this mortality can be generally characterized by decreased crown fire potential and increased surface fire intensity in the short to intermediate term. The scale of present tree mortality is so large that greater potential for "mass fire" exists in the coming decades, driven by the amount and continuity of dry, combustible, large woody material that could produce large, severe fires. For long-term adaptation to climate change, we highlight the importance of moving beyond triage of dead and dying trees to making "green" (live) forests more resilient.

Citation: Stephens, Scott L; Collins, Brandon M; Fettig, Christopher J; Finney, Mark A; Hoffman, Chad M; Knapp, Eric E; North, Malcolm P; Safford, Hugh; Wayman, Rebecca B 2018. Drought, Tree Mortality, and Wildfire in Forests Adapted to Frequent Fire. BioScience. 68(2): 77-88. https://doi.org/10.1093/biosci/bix146.
Topic(s): Fire Ecology, Fire Effects, Ecological - Second Order, Vegetation, Recovery after fire, Resilience
Ecosystem(s): None
Document Type: Book or Chapter or Journal Article
NRFSN number: 17144
FRAMES RCS number: 25662
Record updated: Jul 6, 2018