气候变化领域集成服务门户(CCPortal): Longer-term impacts of fuel reduction treatments on forest structure, fuels, and drought resistance in the Lake Tahoe Basin

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DOI	10.1016/j.foreco.2020.118609
	Longer-term impacts of fuel reduction treatments on forest structure, fuels, and drought resistance in the Lake Tahoe Basin
	Low K.E.; Collins B.M.; Bernal A.; Sanders J.E.; Pastor D.; Manley P.; White A.M.; Stephens S.L.
发表日期	2021
ISSN	0378-1127
卷号	479
英文摘要	Sierra Nevada mixed-conifer forests have undergone significant changes in structure and composition and are increasingly vulnerable to altered disturbance regimes and climate-related extreme events. Fuel reduction treatments, including thinning and follow-up surface fuel treatments, can reduce this vulnerability by creating forest structural and woody fuel conditions that not only allow forest stands to mitigate wildfire, but also alleviate individual tree stress. However, direct observations that quantify these longer-term effects are lacking. This study compares observed changes in forest structure, tree species composition, and downed woody fuel loads across three distinct time periods: pre-treatment, 1 yr post-treatment, and 10 yr post-treatment. Additionally, using tree ring data, we assessed whether treatments affected individual tree resistance to a severe statewide drought (2012–2015). Thinning treatments were able to effectively reduce tree density and basal area, increase the retention of both larger-sized and shade-intolerant trees, and mitigate tree mortality. Treatments were also associated with significantly lower coarse woody fuel and snag basal area. Snag basal area and time since treatment were related to the accumulation of fine and coarse woody surface fuel loads. Tree ring information indicated that treatments improved drought resistance as well, especially in units with lower residual live basal area. This study complements previous studies on fuel reduction thinning by demonstrating that these treatments have lasting effects on forest structure, which also confers a degree of drought resistance. © 2020 Elsevier B.V.
英文关键词	Drought; Forest structure; Longer-term impacts; Mixed-conifer; Resistance; Thinning; Woody fuels
语种	英语
scopus关键词	Drought; Fuels; Direct observations; Disturbance regime; Drought resistance; Fuel reduction treatment; Shade intolerant; Sierra Nevada mixed conifers; Thinning treatment; Tree species composition; Forestry; basal area; coniferous forest; disturbance; drought resistance; extreme event; forest ecosystem; spatiotemporal analysis; tree ring; vulnerability; wildfire; Basal Area; Drought; Forestry; Fuels; Processing; Reduction; Resistance; Trees; Lake Tahoe Basin; Sierra Nevada; United States; Coniferophyta
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154900
作者单位	Department of Environmental Science, Policy, and Management, University of California, Berkeley, 130 Mulford Hall, Berkeley, CA 94720, United States; Center for Fire Research and Outreach, University of California, Berkeley, 130 Mulford Hall, Berkeley, CA 94720, United States; USDA Forest Service, Pacific Southwest Research Station, 1731 Research Park Drive, Davis, CA 95618, United States; USDA Forest Service, Pacific Southwest Research Station, 2480 Carson Road, Placerville, CA 95667, United States
推荐引用方式 GB/T 7714	Low K.E.,Collins B.M.,Bernal A.,et al. Longer-term impacts of fuel reduction treatments on forest structure, fuels, and drought resistance in the Lake Tahoe Basin[J],2021,479.
APA	Low K.E..,Collins B.M..,Bernal A..,Sanders J.E..,Pastor D..,...&Stephens S.L..(2021).Longer-term impacts of fuel reduction treatments on forest structure, fuels, and drought resistance in the Lake Tahoe Basin.Forest Ecology and Management,479.
MLA	Low K.E.,et al."Longer-term impacts of fuel reduction treatments on forest structure, fuels, and drought resistance in the Lake Tahoe Basin".Forest Ecology and Management 479(2021).