Divergent Changes in Vegetation Greenness,Productivity,and Rainfall Use Efficiency Are Characteristic of Ecological Restoration Towards High-Quality Development in the Yellow River Basin,China

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外文摘要：Globally,vegetation has been changing dramatically.The vegetation-water dynamic is key to under-standing ecosystem structure and functioning in water-limited ecosystems.Continual satellite monitor-ing has detected global vegetation greening.However,a vegetation greenness increase does not mean that ecosystem functions increase.The intricate interplays resulting from the relationships between veg-etation and precipitation must be more adequately comprehended.In this study,satellite data,for exam-ple,leaf area index(LAI),net primary production(NPP),and rainfall use efficiency(RUE),were used to quantify vegetation dynamics and their relationship with rainfall in different reaches of the Yellow River Basin(YRB).A sequential regression method was used to detect trends of NPP sensitivity to rainfall.The results showed that 34.53％of the YRB exhibited a significant greening trend since 2000.Among them,20.54％,5337％,and 16.73％of upper,middle,and lower reach areas showed a significant positive trend,respectively.NPP showed a similar trend to LAI in the YRB upper,middle,and lower reaches.A notable difference was noted in the distributions and trends of RUE across the upper,middle,and lower reaches.Moreover,there were significant trends in vegetation-rainfall sensitivity in 16.86％of the YRB's middle reaches-14.08％showed negative trends and 2.78％positive trends.A total of 8.41％of the YRB exhibited a marked increase in LAI,NPP,and RUE.Subsequently,strategic locations reliant on the corre-lation between vegetation and rainfall were identified and designated for restoration planning purposes to propose future ecological restoration efforts.Our analysis indicates that the middle reach of the YRB exhibited the most significant variation in vegetation greenness and productivity.The present study underscores the significance of examining the correlation between vegetation and rainfall within the con-text of the high-quality development strategy of the YRB.The outcomes of our analysis and the proposed ecological restoration framework can provide decision-makers with valuable insights for executing rational basin pattern optimization and sustainable management.

外文关键词：

Vegetation greennessVegetation productivityRainfall use efficiencySensitivityYellow River Basin

作者：

Yang Yu、Ting Hua、Liding Chen、Zhiqiang Zhang、Paulo Pereira

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作者单位：

Jixian National Forest Ecosystem Observation and Research Station,National Ecosystem Research Network of China(CNERN),School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China

School of Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China

State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China

Institute of Land Surface System and Sustainable Development, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China

State Key Laboratory of Urban and Regional Ecolo-gy,Research Center for Eco-environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China

Environmental Management Laboratory,Mykolas Romeris University,Vilnius 08303,Lithuania

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基金：

Fundamental Research Funds for the Central UniversitiesNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development ProgramOutstanding Chinese and Foreign Youth Exchange Program supported by China Association for Science and Technology(2020-2022)

项目编号：

QNTD20230342177310423773312022YFF1300803

出版年：

2024

DOI：

10.1016/j.eng.2023.07.012

工程(英文)

CSTPCDEI

ISSN：2095-8099

年,卷(期)：2024.34(3)