气候变化领域集成服务门户(CCPortal): Variation in annual carbon fluxes affecting the SOC pool in hemiboreal coniferous forests in Estonia

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DOI	10.1016/j.foreco.2018.11.026
	Variation in annual carbon fluxes affecting the SOC pool in hemiboreal coniferous forests in Estonia
	Kriiska K.; Frey J.; Asi E.; Kabral N.; Uri V.; Aosaar J.; Varik M.; Napa Ü.; Apuhtin V.; Timmusk T.; Ostonen I.
发表日期	2019
ISSN	0378-1127
起始页码	419
结束页码	430
卷号	433
英文摘要	Estimation of soil-related carbon (C) fluxes is needed to understand the dynamics of the soil organic carbon pool, to determine changes in the carbon balance and functioning of forest ecosystems, and to support climate change policies. The objective of the study was to analyse the variation in the most dynamic soil C input (tree and understory above- and belowground litter production) and output (soil respiration) fluxes, in addition to the forest floor, understory and fine root biomass stocks, in eight different Scots pine (Pinus sylvestris L.) and Norway spruce (Picea abies (L.) Karst) sites growing on mineral soils in Estonia. Further, the impact of soil C input and output fluxes on the soil organic carbon (SOC) pool was examined, and the net ecosystem production (NEP) of the stands was estimated. Fine root production (FRP) of the trees constituted 53% and 28% and needle litter constituted 25% and 28% of the total annual C input to the soil in the Norway spruce and Scots pine stands, respectively. The total FRP of the trees and the understory roots and rhizomes ranged from 211 to 1040 g m−2 yr−1, of which the understory comprised up to 28%. The mean annual soil respiration (Rs) rate was 5.7 ± 0.3 and 6.5 ± 0.3 Mg C ha−1 yr−1 in the pine and spruce stands, respectively, and did not differ significantly between the two groups of stands. The SOC pool of the studied stands depended significantly on both the above- and belowground C input fluxes. Tree-derived litter had the strongest effect on the SOC pool, while the Rh as the main soil C output flux showed no significant impact. The NEP ranged from 4.2 to −1.8 Mg C ha−1 yr−1 and demonstrated a strong negative correlation with stand age. The results affirm the importance of belowground as well as aboveground litter production on carbon accumulation in forest soils. © 2018 Elsevier B.V.
英文关键词	Fine roots; Net ecosystem production; Picea abies; Pinus sylvestris; SOC; Soil respiration
语种	英语
scopus关键词	Climate change; Ecosystems; Lakes; Magnesium; Organic carbon; Plants (botany); Soils; System-on-chip; Fine roots; Net ecosystem production; Picea abies; Pinus sylvestris; Soil respiration; Forestry; biomass; carbon balance; carbon flux; climate change; coniferous forest; coniferous tree; fine root; forest ecosystem; forest soil; net ecosystem production; organic carbon; soil carbon; soil organic matter; soil respiration; understory; Ecosystems; Forestry; Lakes; Magnesium; Picea Abies; Pinus Sylvestris; Estonia; Picea; Picea abies; Pinus sylvestris
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/156259
作者单位	University of Tartu, Institute of Ecology and Earth Sciences, Vanemuise 46, Tartu, 51003, Estonia; Estonian Environment Agency, Rõõmu tee 2, Tartu, 51013, Estonia; Estonian Environmental Research Centre, Marja 4d, Tallinn, 10617, Estonia; Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Kreutzwaldi 5, Tartu, 51014, Estonia
推荐引用方式 GB/T 7714	Kriiska K.,Frey J.,Asi E.,et al. Variation in annual carbon fluxes affecting the SOC pool in hemiboreal coniferous forests in Estonia[J],2019,433.
APA	Kriiska K..,Frey J..,Asi E..,Kabral N..,Uri V..,...&Ostonen I..(2019).Variation in annual carbon fluxes affecting the SOC pool in hemiboreal coniferous forests in Estonia.Forest Ecology and Management,433.
MLA	Kriiska K.,et al."Variation in annual carbon fluxes affecting the SOC pool in hemiboreal coniferous forests in Estonia".Forest Ecology and Management 433(2019).