A large carbon sink induced by the implementation of the largest afforestation program on Earth
作者机构:Qingyuan Forest CERN CAS Key Laboratory of Forest Ecology and Management Institute of Applied Ecology Chinese Academy of Sciences Key Laboratory of Ecology and Management of Non-Commercial Forests Department of Forestry and Environmental Conservation Clemson University Academy of Forestry-Grassland Inventory and Planning
出 版 物:《Ecological Processes》 (生态过程(英文))
年 卷 期:2023年
页 面:598-607页
核心收录:
学科分类:07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学]
基 金:supported by grants from National Key R&D Program of China (2020YFA0608100) CAS Key Research Program of Frontier Sciences (QYZDJ-SSW-DQC027) National Natural Science Foundation of China (31025007) the Knowledge Innovation Program of Chinese Academy of Sciences (KZCX1-YW-08-02) the Consultation Project supported by Divisions of the Chinese Academy of Sciences (2019-ZW09-A-032)
摘 要:Background Three-North Afforestation Program(TNAP) in China is the largest ecological restoration project on Earth(ongoing from 1978 to 2050), harboring a huge area of newly planted forests, which provides a wealth of goods and ecosystem services that benefit society at levels ranging from region to East Asia. This project-induced carbon(C)sink has been expected to be large, but its size and location remain *** In this study, we investigated the changes in the C stocks of biomass, soil C and the C accumulation benefited from the ecological effects in the project areas from 1978 to 2017 within the Three-North regions(4.069 × 106km2), and evaluated its project-induced C sequestration. Using a combination of remote sensing images, field observations and national forest inventory data, we estimated a total ecosystem sink of 47.06 Tg C per year(1 Tg = 1012 g)increased by the TNAP implementation. Importantly, we first found that the C sink via the ecological effects of this project could contribute to a high proportion up to 15.94%, indicating a critical role of ecological effects in shaping the distribution of C stocks in the protective forests. This finding suggests that it is necessary to explicitly consider carbon sequestration benefited from the ecological effects when estimating C sink and parameterizing C models of the restoration projects in China and *** Our results update the estimates of C pools in the world s largest ecological restoration project area,demonstrating that this project has substantially contributed to mitigating the climate change.