Increasing elevation of fire in the Sierra Nevada and implications for forest change

Schwartz, Mark W., Butt, Nathalie, Dolanc, Christopher R., Holguin, Andrew, Moritz, Max A., North, Malcolm P., Safford, Hugh D., Stephenson, Nathan L., Thorne, James H. and van Mantgem, Phillip J. (2015) Increasing elevation of fire in the Sierra Nevada and implications for forest change. Ecosphere, 6 7: 121.1-121.10. doi:10.1890/ES15-00003.1

Author Schwartz, 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.
Title Increasing elevation of fire in the Sierra Nevada and implications for forest change
Journal name Ecosphere   Check publisher's open access policy
ISSN 2150-8925
Publication date 2015-07
Sub-type Article (original research)
DOI 10.1890/ES15-00003.1
Open Access Status DOI
Volume 6
Issue 7
Start page 121.1
End page 121.10
Total pages 10
Place of publication Washington, DC, United States
Publisher Ecological Society of America
Collection year 2016
Language eng
Abstract Fire 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.
Keyword Climate change
Fire suppression
Forest stand structure
Sierra Nevada
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biological Sciences Publications
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