4.7 Article

Dynamic responses of ecological vulnerability to land cover shifts over the Yellow river Basin, China

期刊

ECOLOGICAL INDICATORS
卷 144, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.ecolind.2022.109554

关键词

Ecological Vulnerability Index; Ecological Degradation; Land Cover changes; Yellow River Basin

资金

  1. Major Science and Tech-nology Projects of Inner Mongolia Autonomous Region
  2. China National Key RD Program
  3. [2020ZD0009]
  4. [2019YFA0606900]

向作者/读者索取更多资源

Ecological protection and high-quality development of the Yellow River Basin have become a major national strategy in China. However, ecological degradation remains a pressing issue, and the impact of land cover changes on ecological vulnerability is not well understood.
Ecological protection and high-quality development of the Yellow River Basin (YRB) aroused profound concerns from China Central Government and is now a major national strategy. However, ecological degradation is still a pressing issue for fluvial ecological conservation. Recent years witnessed widespread implementation of ecological projects such as Grain to Green Project (GGP) and Return Grazing land to Grassland Project (RGGP) which aim to improve the ecological environment of the YRB. While dynamic responses of ecological vulnerability to land cover changes are poorly understood under climate changes and human activities. Here we use the exposure-sensitivity-resilience sliding ecological vulnerability evaluation framework to quantify the Ecological Vulnerability Index (EVI) and scrutinize dynamic responses of EVI to land use changes over the YRB. We find slight ecological degradation with increased EVI across the YRB from 1986 to 2013, and the highest ecological vulnerability in summer. Meanwhile, regions with degraded ecological status are found mainly along the main stream of the YRB. Besides, the gravity centers of EVI cluster mainly in the central and western parts of the YRB and correspond to four ecological conditions, i.e. unstable ecological condition, moderate ecological variability, ecological restoration, and moderate ecological variability. Furthermore, we identify a higher ecological degradation rate of croplands than non-croplands, while evidently lower ecological degradation rate of grasslands than non-grasslands. The GGP and RGGP projects have improved the ecological environment of the YRB, but have not reversed the degrading tendency of the ecological environment across the YRB.

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