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Forest and Grassland Resources Research >

2026 , Vol. 0 >Issue 1: 23 - 33

DOI: https://doi.org/10.13466/j.cnki.lczyyj.2026.01.003

Scientific Research

Spatiotemporal Changes in eco-environment quality of Ningxia Zhongwei Shapotou National Nature Reserve based on remote sensing ecological index

  • LI Xuewu ,
  • NIU Zhiming ,
  • FAN Yufeng ,
  • WANG Xinwei ,
  • ZHANG Bo ,
  • XU Wentong
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  • 1 Academy of Forest and Grassland Inventory and Planning, National Forestry and Grassland Administration, Beijing 100714, China
    2 Ningxia Zhongwei Shapotou National Nature Reserve Administration, Zhongwei 755000,Ningxia, China

Received date: 2025-10-21

  Revised date: 2026-02-10

  Online published: 2026-08-07

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Abstract

The desert-oasis ecotone is one of the most sensitive zones to climate change and human activities in arid ecosystems and long-term dynamic monitoring of its eco-environmental quality is of great significance for optimizing regional ecological security assessment and conservation decision-making.Based on remote sensing images of the Ningxia Zhongwei Shapotou National Nature Reserve from four periods,(2013,2016,2019 and 2021),this study constructed the remote sensing ecological index(RSEI),and analyzed the spatiotemporal evolution characteristics of eco-environmental quality in the study area by combining the grade area transition matrix and the spatial center of gravity transfer model.The results showed that:1) From 2013 to 2021,the eco-environmental quality experienced a phased evolution of internal optimization of low-quality grades,overall obvious improvement,and localized decline and fluctuation.From 2013 to 2016,the transition from Grade I to Grade II dominated the ecological improvement,covering an area of 2 037.71 hm2.The most prominent upward shift from Grade II to Grade III occurred from 2016 to 2019,with an area of 3 399.12 hm2.Obvious degradation occurred from 2019 to 2021 over an area of 5 203.80 hm2,mainly manifested as the reversion from Grade II to Grade I and from Grade III to Grade II.2) The eco-environmental quality of the study area showed clear spatial differentiation,with low-quality zones(Grade I and Grade II) concentrated in the western experimental zone and buffer zone.The eastern and southern parts exhibited better eco-environmental conditions than the western area.Spatially,it presented the phased evolution characteristics of localized restoration in the west,expanded improvement in the north and south,and reversed degradation in the southwest.3) The moderate-quality transition zone represented the most active of eco-environmental change,and the cumulative migration distance of the gravity center for Grade III RSEI was the largest(9 419.67 m).The research results can provide a remote sensing basis for zonal monitoring,differentiated restoration,and ecological management decision-making of nature reserves in the desert-oasis ecotone.

Key words： Shapotou National Nature Reserve; remote sensing ecological index; center of gravity shift model

Cite this article

LI Xuewu , NIU Zhiming , FAN Yufeng , WANG Xinwei , ZHANG Bo , XU Wentong . Spatiotemporal Changes in eco-environment quality of Ningxia Zhongwei Shapotou National Nature Reserve based on remote sensing ecological index[J]. Forest and Grassland Resources Research, 2026 , 0(1) : 23 -33 . DOI: 10.13466/j.cnki.lczyyj.2026.01.003

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