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Journal of Resources and Ecology >

2018 , Vol. 9 >Issue 6: 642 - 653

DOI: https://doi.org/10.5814/j.issn.1674-764x.2018.06.007

Ecosystem Assessment

Ecosystem Carbon Allocation of a Temperate Mixed Forest and a Subtropical Evergreen Forest in China

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  • 1. Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    4. South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China

Received date: 2018-05-18

  Revised date: 2018-07-28

  Online published: 2018-11-30

Supported by

National Key Research and Development Program of China (2017YFC0503801, 2016YFC0500202); National Natural Science Foundation of China (31570446); Science and Technology Service Network Initiative (KFJ-SW-STS-169)

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Abstract

Ecosystem carbon allocation can indicate ecosystem carbon cycling visually through its quantification within different carbon pools and carbon exchange. Using the ecological inventory and eddy covariance measurement applied to both a mature temperate mixed forest in Changbai Mountain (CBM) and a mature subtropical evergreen forest in Dinghu Mountain (DHM), we partitioned the ecosystem carbon pool and carbon exchange into different components, determined the allocation and analyzed relationships within those components. Generally, the total carbon stock of CBM was slightly higher than that of DHM due to a higher carbon stock in the arbor layer at CBM. It was interesting that the proportions of carbon stock in vegetation, soil and litter were similar for the two mature forests. The ratio of vegetation carbon pool to soil carbon stock was 1.5 at CBM and 1.3 at DHM. However, more carbon was allocated to the trunk and root from the vegetation carbon pool at CBM, while more carbon was allocated to foliage and branches at DHM. Moreover, 77% of soil carbon storage was limited to the surface soil layer (0-20 cm), while there was still plentiful carbon stored in the deeper soil layers at DHM. The root/shoot ratios were 0.30 and 0.25 for CBM and DHM, respectively. The rates of net ecosystem productivity (NPP) to gross ecosystem productivity (GPP) were 0.76 and 0.58, and the ratios of ecosystem respiration (Re) to GPP were 0.98 and 0.87 for CBM and DHM, respectively. The net ecosystem carbon exchange/productivity (NEP) was 0.24 t C ha-1 yr-1 for CBM and 3.38 t C ha-1 yr-1 for DHM. Due to the common seasonal and inter-annual variations of ecosystem carbon exchange resulting from the influence of environmental factors, it was necessary to use the long record dataset to evaluate the ecosystem sink capacity.

Key words： carbon allocation; ecosystem carbon exchange; ecosystem carbon stock; ecosystem productivity; mature forest

Cite this article

LUO Yiwei, ZHANG Leiming, GUO Xuebing, DAI Guanhua, WANG Anzhi, ZHOU Guoyi, YU Guirui . Ecosystem Carbon Allocation of a Temperate Mixed Forest and a Subtropical Evergreen Forest in China[J]. Journal of Resources and Ecology, 2018 , 9(6) : 642 -653 . DOI: 10.5814/j.issn.1674-764x.2018.06.007

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