生态修复对东祁连山不同类型草地群落特征及稳定性的影响

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中图分类号：S812 文献标识码：A 文章编号：1007-0435（2026）01-0301-1：

Abstract：In order to explore the changes of community vegetation characteristics and stability before and after different grassland restoration，this study took three main types of grassands （alpine meadow，mountain meadow and temperate grassland） in the easterm Qilian Mountains as the research objects.According to the methods of community investigation，paired sample T-test and curve fiting，the structural characteristics， diversity and stability of communities before and after ecological restoration were analyzed.The results showed that： Comprehensive restoration measures could efectively improve the vegetation coverage，density and biomass of grassland，which showed an upward trend and significant difference （ .P<0.05 ）.After restoration，the important value of dominant species Kobresia humilis in alpine meadow increased to 32.76，the important value of dominant species Stipa bungeana in mountain meadow increased from 25.69 to 32.74，and the important value of dominant species S .breviflora in temperate grassland increased to 3l.2O. Cyperaceae and Gramineae played an important role in the restoration of three types of grassland.The implementation of restoration measures led to the increase of species number and biomass，which changed the grassand population structure and reduced the uniformity of species distribution，so that the Margalef，Shannon-Wiener and Simpson indexes increased，and the pielou evenness index decreased.After restoration，the Euclidean distances of alpine meadow，mountain meadow and temperate steppe were 6.29，8.85 and 5.39，respectively，and the stability of M.Godron was further improved. In summary，ecological restoration can effctively improve the characteristics and stability of grassand communities in the eastern Qilian Mountains，but the responses of each grassland to restoration effects are inconsistent.It is necessary to pay more atention to grassland changes after restoration to prevent grassland degradation again after restoration.

Key Words：East Qilian Mountains; Grassand types; Ecological restoration; Community characteristics;Species diversity;Community stability

草地生态修复是遏制草地退化的核心手段[1，草地修复主要是草地植被和物种多样性的恢复，使受损或退化草地群落结构和功能得到恢复或改良，使草地群落趋于稳定[2-3]。（剩余21918字）