气候变化领域集成服务门户(CCPortal): Fire-Induced Carbon Loss and Tree Mortality in Siberian Larch Forests

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DOI	10.1029/2023GL105216
	Fire-Induced Carbon Loss and Tree Mortality in Siberian Larch Forests
	Webb, Elizabeth E.; Alexander, Heather D.; Paulson, Alison K.; Loranty, Michael M.; Demarco, Jennie; Talucci, Anna C.; Spektor, Valentin; Zimov, Nikita; Lichstein, Jeremy W.
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
起始页码	51
结束页码	1
卷号	51 期号:1
英文摘要	Climate change is intensifying the fire regime across Siberia, with the potential to alter carbon combustion and post-fire carbon re-accumulation trajectories. Few field-based estimates of fire severity (e.g., carbon combustion and tree mortality) exist in Siberian larch forests (Larix spp.), which limits our ability to project how an intensified fire regime will affect regional and global climate feedbacks. Here, we present field-based estimates of fire-induced tree mortality and carbon loss in eastern Siberian larch forests. Our results suggest that fires in this region result in high tree mortality (means of 83% and 76% at Arctic and subarctic sites, respectively). In both absolute and relative terms, aboveground carbon loss following fire is higher in Siberian larch forests than in North America, but belowground carbon loss is considerably lower. This suggests fundamental differences in wildfire behavior and carbon dynamics between dominant vegetation types across the boreal biome. With climate change, forest fires in Siberia are expected to become more severe and more frequent, which could amplify climate change by transferring carbon from the ecosystem to the atmosphere. Although Siberian larch forests make up 20% of the boreal forest biome by area, scientific understanding of the Siberian larch fire regime is limited because the region is remote and mostly roadless. We collected data from burned and nearby unburned Siberian larch forests to understand the effects of fire on the ecosystem. We found that fires in Siberian larch forests kill, on average, about 75% of trees and result in large carbon losses to the atmosphere. These observations of tree mortality and carbon loss are higher than reported in most satellite-based studies and demonstrate that fires in Siberian larch forests could contribute to ongoing climate change. Siberian larch forest fires cause high tree mortality despite species traits and stand structure hypothesized to promote low severity firesCompared with boreal North America, fires in Siberian larch forests result in greater aboveground C loss but lower belowground C loss
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001138755100008
来源期刊	GEOPHYSICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/309443
作者单位	State University System of Florida; University of Florida; Auburn University System; Auburn University; United States Department of Agriculture (USDA); United States Forest Service; Colgate University; Melnikov Permafrost Institute, Siberian Branch of the RAS; Russian Academy of Sciences
推荐引用方式 GB/T 7714	Webb, Elizabeth E.,Alexander, Heather D.,Paulson, Alison K.,et al. Fire-Induced Carbon Loss and Tree Mortality in Siberian Larch Forests[J],2024,51(1).
APA	Webb, Elizabeth E..,Alexander, Heather D..,Paulson, Alison K..,Loranty, Michael M..,Demarco, Jennie.,...&Lichstein, Jeremy W..(2024).Fire-Induced Carbon Loss and Tree Mortality in Siberian Larch Forests.GEOPHYSICAL RESEARCH LETTERS,51(1).
MLA	Webb, Elizabeth E.,et al."Fire-Induced Carbon Loss and Tree Mortality in Siberian Larch Forests".GEOPHYSICAL RESEARCH LETTERS 51.1(2024).