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Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (4): 12-22.DOI: 10.7522/j.issn.1000-694X.2021.00026

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Spatial-temporal evolution of habitat quality and its influencing factors in the Yellow River Basin based on InVEST model and GeoDetector

Jie Yanga(), Baopeng Xieb, Degang Zhanga()   

  1. a.College of Pratacultural Science /, Gansu Agricultural University,Lanzhou 730070,China
    b.College of Management, Gansu Agricultural University,Lanzhou 730070,China
  • Received:2020-12-18 Revised:2021-03-12 Online:2021-07-27 Published:2021-07-27
  • Contact: Degang Zhang

Abstract:

The Yellow River Basin is an important ecological region in China, and it is of great significance to explore the spatio-temporal variation characteristics of biodiversity in this basin for regional ecological protection and restoration. In this study, the InVEST model is used to evaluate the habitat quality of the Yellow River Basin from 2000 to 2018, combined with the spatial autocorrelation model to explore its temporal and spatial changes characteristics. The driving factors of spatial differentiation characteristics of habitat quality are analyzed by using the single factor detection and interactive detection methods of geographic detectors. The results show that: from 2000 to 2018, the average habitat quality index of the Yellow River Basin was 0.631, with a decline rate of 0.16%, and the habitat quality index was high in the west and low in the east. The habitat quality index of the Yellow River Basin exhibits a highly positive spatial correlation characteristic, which shows that the similar values of habitat quality gather in space. The low-value areas of habitat quality are mainly concentrated in the lower reaches of the Yellow River Basin, Guanzhong Plain and Fenhe Valley, while the high-value areas of habitat quality are mainly concentrated in the Qinghai-Tibet Plateau in the upper reaches of the Yellow River. Land use cover type is the most important driving factor for the spatial differentiation of habitat quality, with q value of 0.5560. Moreover, the interaction between any two driving factors on spatial differentiation of habitat quality is greater than that of one driving factor alone, and the interaction factors between land use cover types and temperature, elevation, rainfall, slope and NDVI are all greater than 0.5.

Key words: habitat quality, InVEST model, GeoDetector, spatio-temporal evolution, Yellow River Basin

CLC Number: