气候变化领域集成服务门户(CCPortal): Short-term effect of thinning on the carbon budget of young and middle-aged silver birch (Betula pendula Roth) stands

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DOI	10.1016/j.foreco.2020.118660
	Short-term effect of thinning on the carbon budget of young and middle-aged silver birch (Betula pendula Roth) stands
	Aun K.; Kukumägi M.; Varik M.; Becker H.; Aosaar J.; Uri M.; Buht M.; Uri V.
发表日期	2021
ISSN	0378-1127
卷号	480
英文摘要	Although thinning is a widely used silvicultural method, its effect on stand carbon (C) cycling is still poorly studied at the ecosystem level. The present case study estimated the two-year post-thinning effect on the C balance of a pole and a middle-aged silver birch stand. The results demonstrate the multifaceted impact of thinning on the different C fluxes of deciduous forest ecosystems. The effect of thinning on the C budget of the studied stands was modest: net ecosystem production (NEP) decreased by 1.2 and 1.6 t C ha−1 yr−1 in the pole and the middle- aged stand, respectively; still, both stands remained C sinks. Lower annual production in the thinned stands as a result of the decreased standing biomass of the trees was the main factor for reduced C sequestration capacity. Thinning increased the C accumulation of the herbaceous plants in both stands, however, it did not compensate for the lower C accumulation by the trees. In general, thinning did not affect significantly the soil respiration fluxes; the small post-thinning increase of the annual soil heterotrophic flux, 0.33–0.68 t C ha −1, was most probably related to elevated soil temperature during the active growing season. The annual aboveground litter flux, i.e. the labile C source of Rh, was not significantly changed by thinning. Fine root production and the belowground C input to the soil remained at the same level in the pole stand and decreased slightly in the middle-aged stand. We conclude that the high production ability and fast C accumulation recovery of silver birch stands growing on fertile soils leads to a balanced C budget already during the short post-thinning period. © 2020 Elsevier B.V.
英文关键词	Carbon budget; Fine roots; Heterotrophic respiration; Leaf litter; Net ecosystem production
语种	英语
scopus关键词	Budget control; Carbon; Forestry; Plants (botany); Poles; Silver; Soils; Annual production; Betula pendula roth; Ecosystem levels; Herbaceous plants; Net ecosystem production; Short-term effects; Soil respiration fluxes; Soil temperature; Ecosystems; biomass; carbon budget; carbon flux; carbon sequestration; carbon sink; deciduous forest; forest ecosystem; growing season; net ecosystem production; soil respiration; soil temperature; stand structure; thinning; Carbon; Cost Control; Ecosystems; Forestry; Production; Silver; Soil; Thinning; Betula pendula
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/154824
作者单位	Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, F. R. Kreutzwaldi 5, Tartu, 51006, Estonia; University of Tartu, Institute of Ecology and Earth Sciences, Vanemuise 46, Tartu, 51014, Estonia
推荐引用方式 GB/T 7714	Aun K.,Kukumägi M.,Varik M.,et al. Short-term effect of thinning on the carbon budget of young and middle-aged silver birch (Betula pendula Roth) stands[J],2021,480.
APA	Aun K..,Kukumägi M..,Varik M..,Becker H..,Aosaar J..,...&Uri V..(2021).Short-term effect of thinning on the carbon budget of young and middle-aged silver birch (Betula pendula Roth) stands.Forest Ecology and Management,480.
MLA	Aun K.,et al."Short-term effect of thinning on the carbon budget of young and middle-aged silver birch (Betula pendula Roth) stands".Forest Ecology and Management 480(2021).