北京林业大学学报2026，Vol.48Issue(4)：36-45,10.DOI:10.12171/j.1000-1522.20250452
澜沧江中游东达山-拉乌山植物群落垂直分布格局
Vertical distribution patterns of plant communities in the Dongda Mountain-Lawu Mountain,middle reaches of the Lancang River of western China
摘要
Abstract
[Objective]This paper elucidates the patterns of vertical vegetation distribution and the characteristics of species diversity in the Dongda Mountain-Lawu Mountain of middle reaches of the Lancang River of western China,aiming to construct a schematic map of plant community distribution,thereby providing scientific support for the restoration of degraded ecosystems in this area.[Method]Based on field surveys conducted along an altitudinal gradient,we classified the major plant community types using species importance values and the principles of vegetation floristic division.Community composition,species richness,and alpha diversity were selected as the main evaluation indicators to analyze the patterns of vertical vegetation distribution and their responses to elevational gradient.[Result]A total of 249 vascular plant species were recorded in the survey,belonging to 61 families and 154 genera.The dominant families were Asteraceae,Rosaceae,and Fabaceae,with perennial herbs and shrubs as dominant life forms.Significant differences were observed in vertical vegetation zonation between eastern and western slopes,and eight vertical belts were identified in total,which reflected the transitional characteristics of vegetation structure between the Hengduan Mountains of western China and the South China Floristic Subregion.The diversity of different plant life forms showed regular variations along altitudinal gradient:the species richness and Shannon-Wiener index of tree layer followed a unimodal pattern,peaking in the subalpine dark coniferous forest zone(around 3 850 m);the diversity of shrub and herb layers also exhibited a unimodal pattern,with peaks occurring in the middle-elevation areas with more favorable hydrothermal conditions;the Pielou evenness index of tree layer decreased continuously with increasing elevation,while no consistent variation trend was found for shrub and herb layers.[Conclusion]This study preliminarily clarifies the vertical patterns of plant diversity in the study area of the Hengduan Mountains.The results provide important references for restoration of degraded local ecosystems:on the one hand,they help identify potential target communities and key species for vegetation restoration at different elevations;on the other hand,this research offers a direct basis for rational configuration and near-natural restoration of tree-shrub-herb assemblages along different altitudinal gradients,thereby supporting differentiated and refined ecological restoration practices.关键词
垂直带谱/物种丰富度/α多样性/澜沧江中游Key words
vertical zonation/species richness/α diversity/middle reaches of the Lancang River分类
农业科技引用本文复制引用
黄文平,吴亚杰,王新杰,王雯煜,穆万鹏,周夕淙,徐凌..澜沧江中游东达山-拉乌山植物群落垂直分布格局[J].北京林业大学学报,2026,48(4):36-45,10.基金项目
澜沧江流域高寒区高陡边坡植被恢复及灌溉技术研究及示范项目(HY2024/S36). （HY2024/S36）
