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

Journal of Resources and Ecology 2018年第6期9卷 642-652页

作者： LUO Yiwei ZHANG Leiming GUO Xuebing DAI Guanhua WANG Anzhi ZHOU Guoyi YU Guirui Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing I00101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China South China Botanical Garden Chinese Academy of SciencesGuangzhou 510650China

Ecosystem carbon allocation can indicate ecosystem carbon cycling visually through its quantification within different carbon pools and carbon *** 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 ***, the total carbon stock of CBM was slightly higher than that of DHM due to a higher carbon stock in the arbor layer at *** was interesting that the proportions of carbon stock in vegetation,soil and litter were similar for the two mature *** ratio of vegetation carbon pool to soil carbon stock was 1.5 at CBM and 1.3 at ***, 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 ***,77% of soil carbon storage was limited to the surface soil layer (0-20cm),while there was still plentiful carbon stored in the deeper soil layers at *** root/shoot ratios were 0.30 and 0.25 for CBM and DHM,*** 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 0.98and 0.87for CBM and DHM,*** net ecosystem carbon exchange/productivity (NEP)was 0.24t C ha^-1 yr^-1 for CBM and 3.38t C ha^-1 yr^-1 for *** 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.

关键词： carbon allocation ecosystem carbon stock ecosystem carbon exchange ecosystem productivity mature forest

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Huge Carbon Sequestration Potential in Global forests

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Journal of Resources and Ecology 2012年第3期3卷 193-201页

作者：刘迎春于贵瑞王秋凤张扬建中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室北京100101 中国科学院大学北京100049

forests play an important role in mitigating climate change by absorbing carbon from atmosphere. The global forests sequestrated 2.4±0.4 Pg C y^-1 from 1990 to 2007, while the quantitative assessment on the carbon sequestration potential （CSP） of global forests has much uncertainty. We collected and compiled a database of site above-ground biomass （AGB） of global mature forests, and obtained AGB carbon carrying capacity （CCC） of global forests by interpolating global mature forest site data. The results show that：（i） at a global scale, the AGB of mature forests decline mainly from tropical forests to boreal forests, and the maximum AGB occurs in middle latitude regions; （ii） temperature and precipitation are main factors influencing the AGB of mature forests; and （iii） the above-ground biomass CCC of global forests is about 586.2±49.3 Pg C, and with CSP of 313.4 Pg C. Therefore, achieving CCC of the existing forests by reducing human disturbance is an option for mitigating greenhouse gas emission.

关键词： climatic gradient global forests mature forest above-ground biomass (AGB) carbon carryingcapacity (CCC) carbon sequestration potential (CSP)

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