热带亚热带植物学报2025，Vol.33Issue(4)：451-458,8.DOI:10.11926/jtsb.4896
鼎湖山优势丛枝菌根和外生菌根木本植物的径级结构
Diameter Class Structure of Dominant Arbuscular Mycorrhizal and Ectomycorrhizal Woody Plants in Dinghushan
摘要
Abstract
Arbuscular mycorrhizal(AM)and ectomycorrhizal(EcM)symbioses contribute significantly to the species diversity and abundance of plants,playing irreplaceable roles in maintaining biodiversity.Diameter class structure is an important feature of populations,and analyzing the diameter class structure of individuals in terms of survival,mortality,and recruitment provides insights into the current status and future trajectory of populations.Therefore,the analysis of diameter class structure of AM and EcM plants is of great significance for the maintenance of community biodiversity and targeted conservation of plants.To explore the reasons for the differences in dominance and species diversity of AM and EcM plants in communities,the 20 hm2 permanent plot in the Dinghushan subtropical evergreen broad-leaved forest as a platform was used to analyze the differences in population characteristics of AM and EcM plants from the perspective of diameter class structure of dominant species.The results showed that surviving individuals of AM plants were predominantly small trees,with a diameter class distribution showing an"L"or inverted"J"shape;whereas surviving individuals of EcM plants include a higher proportion of medium-sized trees,with a diameter class distribution showing a peaked or inverted"J"shape.The mortality of AM plants primarily affects small tree individuals,while the mortality of EcM plants involves both small and medium-sized tree individuals.The recruited individuals of EcM plants have larger diameters compared to AM plants.The differences in diameter class structure between AM and EcM plants in surviving and recruited individuals may be two important reasons for the differential dominance of these two plants in communities.EcM plants have a greater reserve of small-diameter individuals for population renewal and a higher proportion of medium-diameter individuals for competitive advantage.Simultaneously,they rely on relatively large-diameter individuals as the main source of recruitment,which enhances their competitive ability in resource acquisition compared to AM plants,leading to their dominant position in the community and making them the principal species in the Dinghushan subtropical evergreen broad-leaved forest.关键词
丛枝菌根树种/外生菌根树种/种群结构/径级Key words
Arbuscular mycorrhizal tree/Ectomycorrhizal tree/Population structure/Diameter class引用本文复制引用
彭威雄,蒋晓兰,文昌宇,冯嘉谊,杨志刚,曹洪麟,练琚愉..鼎湖山优势丛枝菌根和外生菌根木本植物的径级结构[J].热带亚热带植物学报,2025,33(4):451-458,8.基金项目
广东省林草湿资源调查评价监测体系建设项目(23100) （23100）
广东省林业局项目资助 This work was supported by the Project for Construction of Survey,Evaluation and Monitoring System for Forestry,Grassland,Wetland Resources in Guangdong(Grant No.23100),and the Project of Forestry Administration of Guangdong. （Grant No.23100）
