气候变化领域集成服务门户(CCPortal): The carbon balance of a six-year-old Scots pine (Pinus sylvestris L.) ecosystem estimated by different methods

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DOI	10.1016/j.foreco.2018.11.012
	The carbon balance of a six-year-old Scots pine (Pinus sylvestris L.) ecosystem estimated by different methods
	Uri V.; Kukumägi M.; Aosaar J.; Varik M.; Becker H.; Aun K.; Krasnova A.; Morozov G.; Ostonen I.; Mander Ü.; Lõhmus K.; Rosenvald K.; Kriiska K.; Soosaar K.
发表日期	2019
ISSN	0378-1127
起始页码	248
结束页码	262
卷号	433
英文摘要	Clear-cutting is a conventional method of forest management which significantly changes carbon (C) cycling at the ecosystem level for a long time. Estimation of the interim period during which the ecosystem turns from a C source to a C sink is crucial for clarifying the environmental effects of management on forest C cycling. The current study provided new knowledge of C cycling in young pine stand and demonstrated the recovery of C sequestration of the forest ecosystem during the post harvesting period. We estimated the C balance in a 6-year-old Scots pine stand by using two different methods: carbon budgeting, for estimating annual net ecosystem production (NEP), and eddy covariance (EC), for estimating net ecosystem exchange (NEE). For C budgeting, the above- and belowground biomass production of the ecosystem, as well as the soil heterotrophic respiration efflux at the studied site was estimated. Annual NEE at the studied young forest ecosystem was 1.19 ± 0.36 t C ha−1, gross primary ecosystem production was 9.87 and total ecosystem respiration was 11.06 t C ha−1. Estimated NEE was in good accordance with the results of NEP (1.37 t C ha−1), which confirms the relevance of the C budgeting method. Increased annual woody biomass production is the main factor which induced the young Scots pine ecosystem to act as a C sink: annual C accumulation in tree biomass in a 6-year-old stand was 1.0 t C ha−1 but reached already 2.4 t C ha−1 in the following year. Assuming that the annual Rh flux is of the same magnitude in the subsequent years, the ecosystem will become a C sink already during a short period after clear-cut. Annual soil respiration (Rs) and heterotrophic soil respiration (Rh) were 6.0 and 4.2 t C ha−1, respectively and the Rh/Rs ratio was 0.70. However, at this stage also the understorey vegetation contributed essentially to NEP, making up 56% of the annual C uptake accumulated in the plants. The methane flux and the leached C flux were negligible, 0.004 and 0.015 t C ha−1 yr−1, respectively. Our results demonstrate that well regenerated young Scots pine stand on a former clear-cut area will be able to turn into a C sequestering ecosystem already before ten years after cutting. © 2018 Elsevier B.V.
英文关键词	Carbon balance; Eddy covariance; Net ecosystem exchange; Net ecosystem productivity; Scots pine; Soil respiration
语种	英语
scopus关键词	Biomass; Budget control; Carbon; Reforestation; Soils; Vegetation; Carbon balance; Eddy covariance; Net ecosystem exchange; Net ecosystem productivities; Scots pine; Soil respiration; Ecosystems; belowground biomass; biomass; carbon balance; carbon sequestration; carbon sink; coniferous tree; cutting (process); eddy covariance; estimation method; forest ecosystem; forest management; net ecosystem exchange; net ecosystem production; soil respiration; tree; understory; vegetation cover; Biomass; Carbon; Cost Control; Pinus Sylvestris; Plants; Reforestation; 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/156283
作者单位	Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Kreutzwaldi 5, Tartu, 51014, Estonia; University of Tartu, Institute of Ecology and Earth Sciences, Vanemuise 46, Tartu, 51014, Estonia
推荐引用方式 GB/T 7714	Uri V.,Kukumägi M.,Aosaar J.,et al. The carbon balance of a six-year-old Scots pine (Pinus sylvestris L.) ecosystem estimated by different methods[J],2019,433.
APA	Uri V..,Kukumägi M..,Aosaar J..,Varik M..,Becker H..,...&Soosaar K..(2019).The carbon balance of a six-year-old Scots pine (Pinus sylvestris L.) ecosystem estimated by different methods.Forest Ecology and Management,433.
MLA	Uri V.,et al."The carbon balance of a six-year-old Scots pine (Pinus sylvestris L.) ecosystem estimated by different methods".Forest Ecology and Management 433(2019).