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Arid Land Geography ›› 2024, Vol. 47 ›› Issue (3): 474-484.doi: 10.12118/j.issn.1000-6060.2023.385

• Ecology and Environment • Previous Articles     Next Articles

Evolution and response analysis of habitat quality in more sediments and coarse sediments region of northern Shaanxi based on land use change

AN Wenju1,2(), YU Yifan1,2, HAO Shanshan1,2, WANG Yingdi1,2, LI Xiaobing1,2(), MAI Xudong1,2   

  1. 1. Suide Administration Supervision Bureau of Soil and Water Conservation of the Yellow River, Yulin 718000, Shaanxi, China
    2. Key Laboratory of Soil and Water Conservation and Ecological Restoration of the Loess Plateau, Yulin 718000, Shaanxi, China
  • Received:2023-07-27 Revised:2023-09-11 Online:2024-03-25 Published:2024-03-29
  • Contact: LI Xiaobing E-mail:Tenmoon25@163.com;hhsbz@163.com

Abstract:

Due to the insufficiency of aiming at the problem of the evolution of habitat quality under the long temporal land use change in the more sediments and coarse sediments region of northern Shaanxi of China, we evaluated habitat quality and degradation over four annual cycles based on InVEST by reviewing land use type change and transfer matrices for 2000, 2005, 2010, 2015, and 2020. The results show that: (1) Land use in the region is mainly dry land, forested land, grassland, construction land, and bare land. (2) From 2000 to 2020, the area of bare land transferred out was the largest, with a total decrease of 57.11%, mainly converted to grassland and cultivated land. The total increase of construction land reached 272.69%, the area of grassland transfer out and transfer in was the same, mainly converted with cultivated land, and the comprehensive land use dynamic decreased from 1.32% to 0.61%. (3) The habitat quality index first showed an increasing then decreasing trend, with a peak of 0.43, which was low overall, and the expansion of cultivated land posed a threat to habitat restoration. The habitat quality was higher in the region's southwest, the middle zone was mainly medium- and low-grade, and the habitat quality in the northern Shenmu and Fugu mining areas was high. The average habitat degradation index in 2000 and 2020 were 0.41 and 0.43, respectively, and there was a trend of future habitat deterioration. Thus, subsequent ecological governance policies should mainly focus on the prevention and control of cultivated land, construction land expansion, and protection of forest and grassland. The study results can provide a data reference for ecological restoration in north Shaanxi's more sediments and coarse sediments regions.

Key words: land use, transfer matrix, InVEST model, habitat quality