草地学报2026，Vol.34Issue(3)：1017-1028,12.DOI:10.11733/j.issn.1007-0435.2026.03.025
西藏阿里高原中北部草本层生态位与种间联结分析
Niche Characteristics and Interspecific Association Analysis of the Herb Layer in the North-central Alpine Desert of the Ngari Plateau in Xizang
摘要
Abstract
This study focuses on the niche characteristics,interspecific association,and community stability of dominant species in the herb layer under extreme cold and arid conditions on the Ngari Plateau,aiming to pro-vide a research basis for the ecological restoration of alpine desert steppes.The results showed that Stipa pur-purea had the widest niche breadth(12.41).Some species exhibited an asymmetric phenomenon between niche breadth and importance value,with obvious niche differentiation.The average values of the niche overlap index and similarity index were 0.14 and 0.05,respectively,indicating a low overall competition intensity,and spe-cies adopted a low-intensity competition survival strategy.Most interspecific associations were not significant,and the average values of the Jaccard index and Ochiai index were relatively low,with species coexisting in a weak interaction mode.The M.Godron model showed that the intersection point of community stability was close to the theoretical stable point(20,80),and the herb layer was in a stable successional stage.The study indicates that the community maintains stability through the dominance of wide-niche species,the differentiation of narrow-niche species,and weak positive associations.It is suggested that species with similar ecological habits should be preferred in ecological restoration to maintain interspecific balance.关键词
阿里高原/生态位特征/生态位分化/种间联结/群落稳定性Key words
Ngari Plateau/Ecological niche characteristics/Niche differentiation/Interspecific relationships/Community stability分类
农业科技引用本文复制引用
付本艺,白玛玉珍,斯郎次西,孙雪婷,罗大庆,屈兴乐..西藏阿里高原中北部草本层生态位与种间联结分析[J].草地学报,2026,34(3):1017-1028,12.基金项目
西藏农牧大学林学博士点(一期)(533325001) （一期）
阿里生态监测站2024年度监测项目(603324091) （603324091）
西藏农牧学院2025年学科建设项目(高原生态研究所生态学-YJSXK2025-01)资助 （高原生态研究所生态学-YJSXK2025-01）
