气候变化领域集成服务门户(CCPortal): Wildland fire reburning trends across the US West suggest only short-term negative feedback and differing climatic effects

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DOI	10.1088/1748-9326/ab6c70
	Wildland fire reburning trends across the US West suggest only short-term negative feedback and differing climatic effects
	Buma B.; Weiss S.; Hayes K.; Lucash M.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Wildfires are a significant agent of disturbance in forests and highly sensitive to climate change. Short-interval fires and high severity (mortality-causing) fires in particular, may catalyze rapid and substantial ecosystem shifts by eliminating woody species and triggering conversions from forest to shrub or grassland ecosystems. Modeling and fine-scale observations suggest negative feedbacks between fire and fuels should limit reburn prevalence as overall fire frequency rises. However, while we have good information on reburning patterns for individual fires or small regions, the validity of scaling these conclusions to broad regions like the US West remains unknown. Both the prevalence of reburning and the strength of feedbacks on likelihood of reburning over differing timescales have not been documented at the regional scale. Here we show that while there is a strong negative feedback for very short reburning intervals throughout wildland forests of the Western US, that feedback weakens after 10-20 years. The relationship between reburning intervals and drought diverges depending on location, with coastal systems reburning quicker (e.g. shorter interval between fires) in wetter conditions and interior forests in drier. This supports the idea that vegetation productivity - primarily fine fuels that accumulate rapidly (<10 years) - is of primary importance in determining reburn intervals. Our results demonstrate that while over short time intervals increasing fires inhibits reburning at broad scales, that breaks down after a decade. This provides important insights about patterns at very broad scales and agrees with finer scale work, suggesting that lessons from those scales apply across the entire western US. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	climate change; ecology; fire; fire feedbacks; reburning; resilience; short interval fire
语种	英语
scopus关键词	Climate change; Ecology; Ecosystems; Forestry; Climatic effects; Fire frequencies; Grassland ecosystems; Reburning; resilience; Short time intervals; Short-interval; Vegetation productivity; Fires; climate change; disturbance; drought; ecosystem resilience; grassland; shrub; vegetation type; wildfire; United States
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154183
作者单位	Dept. of Integrative Biology, University of Colorado, Denver, Colorado, United States; Portland State University, Portland, OR, United States
推荐引用方式 GB/T 7714	Buma B.,Weiss S.,Hayes K.,et al. Wildland fire reburning trends across the US West suggest only short-term negative feedback and differing climatic effects[J],2020,15(3).
APA	Buma B.,Weiss S.,Hayes K.,&Lucash M..(2020).Wildland fire reburning trends across the US West suggest only short-term negative feedback and differing climatic effects.Environmental Research Letters,15(3).
MLA	Buma B.,et al."Wildland fire reburning trends across the US West suggest only short-term negative feedback and differing climatic effects".Environmental Research Letters 15.3(2020).