气候变化领域集成服务门户(CCPortal): Long-term ecological consequences of forest fires in the continuous permafrost zone of Siberia

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DOI	10.1088/1748-9326/ab7469
	Long-term ecological consequences of forest fires in the continuous permafrost zone of Siberia
	Kirdyanov A.V.; Saurer M.; Siegwolf R.; Knorre A.A.; Prokushkin A.S.; Churakova O.V.; Fonti M.V.; Büntgen U.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Wildfires are an important factor in controlling forest ecosystem dynamics across the circumpolar boreal zone. An improved understanding of their direct and indirect, short- to long-term impacts on vegetation cover and permafrost-vegetation coupling is particularly important to predict changes in carbon, nutrient and water cycles under projected climate warming. Here, we apply dendrochronological techniques on a multi-parameter dataset to reconstruct the effect of wildfires on tree growth and seasonal permafrost thaw depth in Central Siberia. Based on annually-resolved and absolutely dated information from 19 Gmelin larch (Larix gmelinii (Rupr.) Rupr.) trees and active soil layer thickness measurements, we find substantial stand-level die-off, as well as the removal of ground vegetation and the organic layer following a major wildfire in 1896. Reduced stem growth coincides with increased δ 13C in the cellulose of the surviving trees during the first decade after the wildfire, when stomatal conductance was reduced. The next six to seven decades are characterized by increased permafrost active soil layer thickness. During this period of post-wildfire ecosystem recovery, enhanced tree growth together with positive δ 13C and negative δ 18O trends are indicative of higher rates of photosynthesis and improved water supply. Afterwards, a thinner active soil layer leads to reduced growth because tree physiological processes become limited by summer temperature and water availability. Revealing long-term effects of forest fires on active soil layer thickness, ground vegetation composition and tree growth, this study demonstrates the importance of complex vegetation-permafrost interactions that modify the trajectory of post-fire forest recovery across much of the circumpolar boreal zone. To further quantify the influence of boreal wildfires on large-scale carbon cycle dynamics, future work should consider a wide range of tree species from different habitats in the high-northern latitudes. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	active soil layer; boreal forest; permafrost; Siberia; stable isotopes; tree rings; wildfire
语种	英语
scopus关键词	Carbon; Deforestation; Ecosystems; Fire hazards; Permafrost; Thickness measurement; Vegetation; Water supply; Active soils; Boreal forests; SIBERIA; Stable isotopes; Tree rings; wildfire; Fires; active layer; dendrochronology; ecological approach; ecosystem dynamics; forest ecosystem; forest fire; long-term change; permafrost; reconstruction; stable isotope; tree ring; wildfire; Carbon; Deforestation; Ecosystems; Permafrost; Plants; Water Supply; Siberia; Larix; Larix gmelinii
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/154186
作者单位	Department of Geography, University of CambridgeCB2 3EN, United Kingdom; V.N.Sukachev Institute of Forest SB RAS, Federal Research Center 'Krasnoyarsk Science Center SB RAS', 660036 Krasnoyarsk, Akademgorodok, Russian Federation; Siberian Federal University, Svobodnii 79, Krasnoyarsk, 660041, Russian Federation; Swiss Federal Research Institute WSL, Birmensdorf, CH-8903, Switzerland; State Natural Reserve (Stolby), Krasnoyarsk, 660006, Russian Federation; Department of Geography, Faculty of Science, Masaryk University, Brno, 613 00, Czech Republic; Global Change Research Institute of the Czech Academy of Sciences (CzechGlobe), Brno, 603 00, Czech Republic
推荐引用方式 GB/T 7714	Kirdyanov A.V.,Saurer M.,Siegwolf R.,et al. Long-term ecological consequences of forest fires in the continuous permafrost zone of Siberia[J],2020,15(3).
APA	Kirdyanov A.V..,Saurer M..,Siegwolf R..,Knorre A.A..,Prokushkin A.S..,...&Büntgen U..(2020).Long-term ecological consequences of forest fires in the continuous permafrost zone of Siberia.Environmental Research Letters,15(3).
MLA	Kirdyanov A.V.,et al."Long-term ecological consequences of forest fires in the continuous permafrost zone of Siberia".Environmental Research Letters 15.3(2020).