Climate, Fire, and Forest Change in California’s Sierra Nevada

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The southwest CASC has developed an informational handout that summarizes and synthesizes information on climate, fire, and forest change in California’s iconic Sierra Nevada. This useful resource provides a summary of key management issues and options for adaptation in this important region.

A fire burns in the distance in the Sierra National Forest, CA

Fire in the Sierra National Forest, CA

(Public domain.)

Projections of future fire risks point to increased fire frequency and increased numbers of large fires in the Sierra Nevada region. As warmer temperatures reduce snow-covered area, induce early snowmelt, and decrease soil moisture, they contribute to longer and warmer fire seasons. The management and uses of forest ecosystems and resources will be impacted as forests change along with changing climate and fire regimes. In some areas, forests may be replaced with shrublands, grasslands, or deserts. Climate change effects on forests will be driven by the rate and magnitude of climate change, site-specific conditions, the ability of species to shift distributions through dispersal and recruitment, and the influence of other ecological stressors. While climate-change impacts on structure, composition, and ecosystem function play out over longer time periods, fire can hasten these changes by triggering changes in vegetation type.

Successful adaptation for these important forests will require a mix of large- and small-scale approaches to challenges. There are key management issues and adaptation options at various levels: the southwest region overall, the Sierra Nevada, forests, and all the way down to trees. View the informational handout to learn more about the science behind these forest changes and some of the adaptation strategies that can help resource managers reduce future risks.