防城季节性雨林两广梭罗树种群空间分布格局及种内关联分析  

Analysis on Spatial Distribution Pattern and Intraspecific Correlation of Reevesia thyrsoidea Population in Fangcheng Seasonal Rainforest

作　　者：左静 陈善栋 杨凤琴 李武峥 覃毅 廖南燕 杨婷 梁士楚[2] ZUO Jing;CHEN Shandong;YANG Fengqin;LI Wuzheng;QIN Yi;LIAO Nanyan;YANG Ting;LIANG Shichu(Guangxi Fangcheng Golden Camellia National Nature Reserve Management Center,Fangchenggang,Guangxi,538021,China;College of Life Science,Guangxi Normal University,Guilin,Guangxi,541006,China)

机构地区：[1]广西壮族自治区防城金花茶国家级自然保护区管理中心,广西防城港538021 [2]广西师范大学生命科学学院,广西桂林541006

出　　处：《广西科学院学报》2024年第2期112-118,共7页Journal of Guangxi Academy of Sciences

基　　金：广西自然科学基金项目(2022GXNSFAA035600);中央财政林业改革发展资金项目(GXZ2022-C3-002212-YZLZ);2023年度广西大学生创新创业训练计划项目(S202310602177)资助。

摘　　要：为探究两广梭罗树(Reevesia thyrsoidea)种群的空间分布格局及种内关联特征,本研究在防城那山子季节性雨林设置1 hm^(2)动态监测样地,分别采用单变量函数g(r)和双变量函数K_(12)(r)分析种群的空间分布格局和不同发育阶段个体群的种内关联性。结果显示:两广梭罗树种群的小龄级个体数量较多,种群径级结构呈金字塔形,种群处于增长状态;在多尺度上,两广梭罗树种群整体以及幼树、小树和成树个体群趋于集群分布;幼树、小树和成树个体群之间空间分布呈现显著的正相关;两广梭罗树种群幼龄个体充足,具有良好的更新潜能,成年个体对幼龄个体无明显的抑制作用;通过个体聚集和种内庇护的方式,两广梭罗树种群在群落中具有较强的竞争能力,并占据着有利的生态位。综上,两广梭罗树种群目前的生存状况受密度制约因素影响较小,呈现增长的趋势。In order to explore the spatial distribution pattern and intraspecific association characteristics of Reevesia thyrsoidea population,a 1 hm^(2) dynamic monitoring plot was set up in the seasonal rainforest of Nashanzi in Fangcheng.The univariate function g(r)and the bivariate function K_(12)(r)were used to analyze the spatial distribution pattern of the population and the intraspecific correlation of individual groups at different developmental stages.The results show that there are a large number of small age individuals in the R.thyrsoidea population,the population diameter structure is pyramid shaped,and the population is in a growing state.On multi scale,the whole population,saplings,small trees and adult trees of R.thyrsoidea tend to cluster distribution.There is a significant positive correlation between the spatial distribution of saplings,small trees and adult trees.The young individuals of R.thyrsoidea population are abundant and have a good regeneration potential.The adult individuals have no significant inhibitory effect on the young individuals.Through individual aggregation and intraspecies protection,R.thyrsoidea population has a strong competitiveness in the community and occupies a favorable ecological niche.In summary,the current survival status of R.thyrsoidea population is less affected by density constraints and shows an increasing trend.

关 键 词：两广梭罗树 空间格局 种内关联 季节性雨林 防城 

分 类 号：Q948[生物学—植物学]