基于景观格局的玉树州天然草地生态脆弱性分析

摘要

[Purpose] It aims to study the situation of ecological vulnerability of grassland in Yushu. [ Methods] Based on the field survey sampling spots on grassland of Yushu, interpretation has been conducted on grassland types on TM remote sensing image, and grassland degradation degree has been qualified. By using landscape indexes, ecological vulnerability analysis has been conducted on landscape types of seven natural grasslands. [ Result] The comprehensive index of ecological vulnerability of Yushu grassland is low, and moderately vulnerable area and above have taken up 99. 91% of the total area. [ Conclusion] Ecological vulnerability has been the largest hidden danger threatening ecological security of grasslands in the test area.%[目的]研究玉树州天然草地生态脆弱现状.[方法]根据玉树州天然草地野外调查样点,对TM遥感影像草地类型进行解译,对天然草地退化程度进行定性.利用景观指数对玉树州7个天然草地景观类型进行生态脆弱性分析.[结果]玉树州天然草地区域生态脆弱综合指数偏低,中度以上脆弱区域面积约占99.91％.[结论]生态脆弱性已经成为威胁试验区天然草地生态安全的最大隐患.