DOI: 10.1002/2017JG004038
Scopus记录号: 2-s2.0-85045505400
论文题名: Excessive Afforestation and Soil Drying on China's Loess Plateau
作者: Zhang S. ; Yang D. ; Yang Y. ; Piao S. ; Yang H. ; Lei H. ; Fu B.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 3 起始页码: 923
结束页码: 935
语种: 英语
英文关键词: climate change
; climate-soil-vegetation interaction
; ecohydrological optimality
; equilibrium vegetation cover
; the Loess Plateau
; vegetation restoration
Scopus关键词: afforestation
; climate change
; deforestation
; ecohydrology
; optimization
; restoration ecology
; revegetation
; soil moisture
; soil-vegetation interaction
; streamflow
; vegetation cover
; China
; Loess Plateau
英文摘要: Afforestation and deforestation as human disturbances to vegetation have profound impacts on ecohydrological processes influencing both water and carbon cycles and ecosystem sustainability. Since 1999, large-scale revegetation activities such as “Grain-to-Green Program” have been implemented across China's Loess Plateau. However, negative ecohydrological consequences, including streamflow decline and soil drying have emerged. Here we estimate the equilibrium vegetation cover over the Loess Plateau based on an ecohydrological model and assess the water balance under the equilibrium and actual vegetation cover over the past decade. Results show that the current vegetation cover (0.48 on average) has already exceeded the climate-defined equilibrium vegetation cover (0.43 on average) in many parts of the Loess Plateau, especially in the middle-to-east regions. This indicates a widespread overplanting, which is found to primarily responsible for soil drying in the area. Additionally, both the equilibrium vegetation cover and soil moisture tend to decrease under future (i.e., 2011–2050) climate scenarios due to declined atmospheric water supply (i.e., precipitation) and increased atmospheric water demand (i.e., potential evapotranspiration). Our findings suggest that further revegetation on the Loess Plateau should be applied with caution. To maintain a sustainable ecohydrological environment in the region, a revegetation threshold is urgently needed to guide future revegetation activities. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114304
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Hydro-Science and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, China; CSIRO Land and Water, Black Mountain, Canberra, ACT, Australia; College of Urban and Environmental Sciences, Peking University, Beijing, China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Zhang S.,Yang D.,Yang Y.,et al. Excessive Afforestation and Soil Drying on China's Loess Plateau[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(3)