Skip to Main Content
Increasing elevation of fire in the Sierra Nevada and implications for forest changeAuthor(s): Mark W. Schwartz; Nathalie Butt; Christopher R. Dolanc; Andrew Holguin; Max A. Moritz; Malcolm P. North; Hugh D. Safford; Nathan L. Stephenson; James H. Thorne; Phillip J. van Mantgem
Source: Ecosphere. 6(7): 1-10
Publication Series: Scientific Journal (JRNL)
Station: Pacific Southwest Research Station
View PDF (583.0 KB)
DescriptionFire in high-elevation forest ecosystems can have severe impacts on forest structure, function and biodiversity. Using a 105-year data set, we found increasing elevation extent of fires in the Sierra Nevada, and pose five hypotheses to explain this pattern. Beyond the recognized pattern of increasing fire frequency in the Sierra Nevada since the late 20th century, we find that the upper elevation extent of those fires has also been increasing. Factors such as fire season climate and fuel build up are recognized potential drivers of changes in fire regimes. Patterns of warming climate and increasing stand density are consistent with both the direction and magnitude of increasing elevation of wildfire. Reduction in high elevation wildfire suppression and increasing ignition frequencies may also contribute to the observed pattern. Historical biases in fire reporting are recognized, but not likely to explain the observed patterns. The four plausible mechanistic hypotheses (changes in fire management, climate, fuels, ignitions) are not mutually exclusive, and likely have synergistic interactions that may explain the observed changes. Irrespective of mechanism, the observed pattern of increasing occurrence of fire in these subalpine forests may have significant impacts on their resilience to changing climatic conditions.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
CitationSchwartz, Mark W.; Butt, Nathalie; Dolanc, Christopher R.; Holguin, Andrew; Moritz, Max A.; North, Malcolm P.; Safford, Hugh D.; Stephenson, Nathan L.; Thorne, James H.; van Mantgem, Phillip J. 2015. Increasing elevation of fire in the Sierra Nevada and implications for forest change. Ecosphere. 6(7): 1-10.
Keywordsclimate change, fire, fire suppression, forest stand structure, fuels, Sierra Nevada, subalpine
- Fire weather and large fire potential in the northern Sierra Nevada
- Mixed severity fire effects within the Rim fire: Relative importance of local climate, fire weather, topography, and forest structure
- Modeling effects of climate change and fire management on western white pine (Pinus monticola) in the northern Rocky Mountains, USA
XML: View XML