期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 115, 期 16, 页码 4039-4044出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1700294115
关键词
carbon sequestration; carbon sink; ecological restoration; national ecological project; China
资金
- Strategic Priority Programme of the Chinese Academy of Sciences [XDA05060000, XDA05060700]
- National Major Research Program of China [2016YFC0503403, 2017YFA0604702]
- Youth Innovation Promotion Association, Chinese Academy of Sciences
The long-term stressful utilization of forests and grasslands has led to ecosystem degradation and C loss. Since the late 1970s China has launched six key national ecological restoration projects to protect its environment and restore degraded ecosystems. Here, we conducted a large-scale field investigation and a literature survey of biomass and soil C in China's forest, shrubland, and grassland ecosystems across the regions where the six projects were implemented (similar to 16% of the country's land area). We investigated the changes in the C stocks of these ecosystems to evaluate the contributions of the projects to the country's C sink between 2001 and 2010. Over this decade, we estimated that the total annual C sink in the project region was 132 Tg C per y (1 Tg = 10(12) g), over half of which (74 Tg C per y, 56%) was attributed to the implementation of the projects. Our results demonstrate that these restoration projects have substantially contributed to CO2 mitigation in China.
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