【摘要】 基于弄岗15-hm2喀斯特季节性雨林动态监测样地2021年的野外复查数据，本研究对林分整体和优势种的随机体分布特征进行分析，并从生活型和环境因子角度探讨随机体的影响因素。结果显示，无论是林分整体还是优势种的角尺度分布中，随机体频率均最高，在0.5以上。林分整体和优势种角尺度分布均为随机分布。乔木分布格局为随机分布，灌木为聚集分布，且随机体比例均超过55%。原有植株个体数、平均胸径、平均海拔、地形湿润度指数和坡度对随机体的解释率较高。综上所述，我们认为，随机体在喀斯特天然林中占据主导地位，其分布受林木生活型、生物因素以及复杂地形条件的共同影响。更多还原

【Abstract】 Based on 2021 field survey data from the 15-hm2 Nonggang karst seasonal rainforest dynamic monitoring plot, this study analyzed the distribution characteristics of random framework within the overall stand and among dominant species. Additionally, the factors influencing the distribution of random framework were explored from the perspectives of life forms and environmental variables. Results showed that the frequency of random framework in the uniform angle index distribution was highest, exceeding 0.5, both for the stand as whole and for dominant species. The overall stand and dominant species both exhibit random distribution. Trees showed a random distribution pattern, while shrubs were aggregated, with random framework accounting for more than 55% of the total. Key factors influencing the occurrence of random framework included the number of original plant individuals, average diameter at breast height, average elevation,topographic wetness index, and slope, which together explained a significant proportion of the variation. In conclusion, random framework occupy a dominant position within karst natural forests, with their distribution significantly influenced by the combined effects of tree life forms, biological factors, and complex topographical conditions.更多还原