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Forest and Grassland Resources Research >

2022 , Vol. 0 >Issue 1: 61 - 69

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2022.01.008

Scientific Research

Influence of Land Use on Landscape Pattern Evolution of Rocky Desertification in Karst Areas of Yunnan,China

  • Xiangyun TIAN ,
  • Chao ZHANG ,
  • Qi CHEN ,
  • Xiaorong SHI ,
  • Yan WANG
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  • 1. Southwest Forestry University,Kunming 650224,China
    2. Yunnan Key Laboratory of Ecological Environment Evolution and Pollution Control in Mountainous Rural Areas,Kunming 650224,China

Received date: 2021-12-14

  Revised date: 2022-01-10

  Online published: 2022-03-31

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Abstract

In order to explore the land use types and the temporal and spatial characteristics and evolution laws of rocky desertification grades in karst areas of Yunnan Province,the effects of different land use types on rocky desertification grades were analyzed. The data of land use type was obtained based on GlobeLand30,and the data of rocky desertification grade was obtained by using ENVI to classify the decision tree of Landsat image. The spatial analysis of land use type and rocky desertification landscape pattern were carried out by ArcGIS and Fragstats. The results in the karst area of Yunnan from 2000 to 2020 showed that: 1) The main types of land use were cultivated land,woodland and grassland,and the area of cultivated land and construction land was increased year by year. 2)The area of non-rocky desertification increased year by year,the area of severe rocky desertification decreased year by year,the overall grade of rocky desertification tended to improve,and the area of high-grade rocky desertification patch decreased,namely the dominance decreased. 3) Rocky desertification mainly occured in woodland and shrubbery,the area of rocky desertification in cultivated land showed an increasing trend,and the area of rocky desertification in woodland and grassland showed a decreasing trend except for the grade of extremely severe rocky desertification. 4) The PAFRAC of land use type and rocky desertification landscape pattern decreased by 0.0007 and 0.0022 respectively,while COHESION,AI,DIVISION,SHDI and SHEI showed negative correlation. The complexity of rocky desertification landscape type decreased with the change of land use landscape type,and the situation of rocky desertification improved continuously. This study was helpful to evaluate the effectiveness of rocky desertification control and provided a scientific basis for ecological restoration and rocky desertification control in the future.

Key words： rocky desertification; land use; landscape pattern evolution; transition matrix; karst areas; Yunnan Province

Cite this article

Xiangyun TIAN , Chao ZHANG , Qi CHEN , Xiaorong SHI , Yan WANG . Influence of Land Use on Landscape Pattern Evolution of Rocky Desertification in Karst Areas of Yunnan,China[J]. Forest and Grassland Resources Research, 2022 , 0(1) : 61 -69 . DOI: 10.13466/j.cnki.lyzygl.2022.01.008

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