Wildfire-driven forest conversion in western North American landscapes

BioScience
By: , and 

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Abstract

Changing disturbance regimes and climate can overcome forest ecosystem resilience. Following high-severity fire, forest recovery may be compromised by lack of tree seed sources, warmer and drier postfire climate, or short-interval reburning. A potential outcome of the loss of resilience is the conversion of the prefire forest to a different forest type or nonforest vegetation. Conversion implies major, extensive, and enduring changes in dominant species, life forms, or functions, with impacts on ecosystem services. In the present article, we synthesize a growing body of evidence of fire-driven conversion and our understanding of its causes across western North America. We assess our capacity to predict conversion and highlight important uncertainties. Increasing forest vulnerability to changing fire activity and climate compels shifts in management approaches, and we propose key themes for applied research coproduced by scientists and managers to support decision-making in an era when the prefire forest may not return.

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Publication type Article
Publication Subtype Journal Article
Title Wildfire-driven forest conversion in western North American landscapes
Series title BioScience
DOI 10.1093/biosci/biaa061
Volume 70
Issue 8
Year Published 2020
Language English
Publisher Oxford Academic
Contributing office(s) Fort Collins Science Center
Description 15 p.
First page 659
Last page 673
Country Canada, United States
State Alaska, Alberta, Arizona, British Columbia, California, Colorado, Idaho, Montana, Nevada, New Mexico, Northwest Territories, Oregon, Saskatchewan, Utah, Washington, Wyoming, Yukon
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