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Substantially Enhanced Landscape Carbon Sink Due To Reduced Terrestrial-Aquatic Carbon Transfer Through Soil Conservation in the Chinese Loess Plateau

文献类型：期刊论文

作者Ran, Lishan1,2; Fang, Nufang3; Wang, Xuhui4; Piao, Shilong4; Chan, Chun Ngai1,2; Li, Siliang5; Zeng, Yi3; Shi, Zhihua6; Tian, Mingyang7; Xu, Yi-jun8
刊名EARTHS FUTURE
出版日期2023-07-01
卷号11期号:7页码:13
DOI10.1029/2023EF003602
通讯作者Ran, Lishan(lsran@hku.hk) ; Li, Siliang(siliang.li@tju.edu.cn)
英文摘要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 CO2. 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. Plain Language Summary Aquatic export of terrestrial carbon (C) plays a significant role in modulating the magnitude of terrestrial C sink. Previous estimates of terrestrial C sink may be overestimated because not all C losses across heterogeneous landscapes are accurately determined and properly accounted for. This is particularly possible for catchments with high erosion and terrestrial-aquatic C transfer potential. Meanwhile, soil conservation can greatly modify landscape C sequestration capacity. Thus, a more comprehensive assessment of net landscape C budget is needed that integrates aquatic export of terrestrial C while considering the role and significance of soil conservation. For the Chinese Loess Plateau in semiarid climates that once characterized the world's high soil erosion rate, we show a surprisingly low aquatic C transfer that offset the terrestrial C sink by only 7.5%, due largely to successful soil conservation in the past decades. Our findings suggest that effective implementation of soil conservation practices can substantially reduce terrestrial-aquatic C transfer and enhance the landscape C sequestration capacity.
WOS关键词SEMIARID ECOSYSTEMS ; YELLOW-RIVER ; DIOXIDE ; EMISSIONS ; LAND ; CO2 ; SEDIMENT ; EROSION ; METHANE ; LAKES
资助项目Research Grants Council of Hong Kong[17300619] ; Research Grants Council of Hong Kong[17300621] ; National Natural Science Foundation of China[42222062] ; National Natural Science Foundation of China[42171096]
WOS研究方向Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:001020300500001
资助机构Research Grants Council of Hong Kong ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/195582]  
专题中国科学院地理科学与资源研究所
通讯作者Ran, Lishan; Li, Siliang
作者单位1.Univ Hong Kong, Dept Geog, Hong Kong, Peoples R China
2.Univ Hong Kong, Inst Climate & Carbon Neutral, Hong Kong, Peoples R China
3.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Peoples R China
4.Peking Univ, Sino French Inst Earth Syst Sci, Coll Urban & Environm Sci, Beijing, Peoples R China
5.Tianjin Univ, Inst Surface Earth Syst Sci, Sch Earth Syst Sci, Tianjin, Peoples R China
6.Huazhong Agr Univ, Coll Resources & Environm, Wuhan, Peoples R China
7.Univ Hamburg, Inst Geol, Ctr Earth Syst Res & Sustainabil CEN, Hamburg, Germany
8.Louisiana State Univ Agr Ctr, Sch Renewable Nat Resources, Baton Rouge, LA USA
9.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD USA
10.Univ Res Ct, College Pk, MD USA
推荐引用方式
GB/T 7714		 Ran, Lishan,Fang, Nufang,Wang, Xuhui,et al. Substantially Enhanced Landscape Carbon Sink Due To Reduced Terrestrial-Aquatic Carbon Transfer Through Soil Conservation in the Chinese Loess Plateau[J]. EARTHS FUTURE,2023,11(7):13.
APA Ran, Lishan.,Fang, Nufang.,Wang, Xuhui.,Piao, Shilong.,Chan, Chun Ngai.,...&Liu, Boyi.(2023).Substantially Enhanced Landscape Carbon Sink Due To Reduced Terrestrial-Aquatic Carbon Transfer Through Soil Conservation in the Chinese Loess Plateau.EARTHS FUTURE,11(7),13.
MLA Ran, Lishan,et al."Substantially Enhanced Landscape Carbon Sink Due To Reduced Terrestrial-Aquatic Carbon Transfer Through Soil Conservation in the Chinese Loess Plateau".EARTHS FUTURE 11.7(2023):13.

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来源：地理科学与资源研究所

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