环境科学
水土保持
土壤碳
固碳
碳汇
陆地生态系统
生态系统
水槽(地理)
旱地盐分
黄土
腐蚀
侵蚀控制
土壤生物多样性
农林复合经营
水文学(农业)
土壤有机质
土壤科学
土壤水分
生态学
二氧化碳
地质学
地理
地貌学
农业
生物
岩土工程
地图学
作者
Lishan Ran,Nianqiao Fang,Xuhui Wang,Shilong Piao,Chun Ngai Chan,Siliang Li,Yi Zeng,Zhihua Shi,Mingyang Tian,Y. Jun Xu,Junyu Qi,Boyi Liu
摘要
Abstract Soil conservation is of global importance, as accelerated soil erosion by human activity is a primary threat to ecosystem viability. However, the significance and role of soil conservation in reshaping landscape carbon (C) accounting has not been comprehensively integrated in the terrestrial C sink. Here, we present the first integrated assessment of the modified terrestrial C sink and aquatic C transport due to soil conservation for the semiarid Chinese Loess Plateau (CLP), the world's most vulnerable region to soil erosion. We show a surprisingly low terrestrial‐aquatic C transfer that offset the terrestrial net ecosystem productivity by only 7.5%, which we attribute to the effective implementation of soil conservation practices. Despite the highest soil erosion, the semiarid CLP acts as effective C sink at 43.2 ± 22.6 g C m −2 year −1 , which is comparable to temperate forest in absorbing atmospheric CO 2 . Moreover, C burial in reservoirs has created an additional anthropogenic C sink of 2.9 ± 1.1 g C m −2 year −1 . Our findings indicate that effective soil conservation can significantly increase landscape C sequestration capacity. The co‐benefits of soil conservation in erosion control and C sequestration have important implications for policy makers in other regions undergoing increasing erosion intensity to pursue environmental sustainability.
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