广西科学院学报2023，Vol.39Issue(4)：426-432,7.DOI:10.13657/j.cnki.gxkxyxb.20231226.009
广东江门古兜山保护区光叶红豆种群径级结构与空间分布格局
Diameter Structure and Spatial Distribution Pattern of Ormosia glaberrima Population in Gudushan Reserve,Jiangmen,Guang-dong
摘要
Abstract
In order to understand the survival status of the rare and endangered plant Ormosia glaberrima population in Gudoushan Provincial Nature Reserve in Guangdong Province,this study analyzed the popula-tion size structure based on the data of 1 hm2 forest plot,and used the point pattern analysis method to study the spatial distribution pattern of the population.The results demonstrated that the size structure of O.glaberrima was an inverted"J"shape,and the individuals were mainly saplings.In addition,the mortality rates of saplings and middle-age trees were higher in comparison with adults,and the survival rate of individ-uals tended to be stable with the increase of diameter class,the overall age structure was growth-type and the population structure was stable.On the small spatial scale,the O.glaberrima individuals were spatilly clus-tered,and with the increase of spatial scale,individuals tended to be randomly distributed.The saplings of O.glaberrima were clustered,and with the increase of diameter class,the degree of aggregation decreased,and the adult trees were randomly distributed.Therefore,the spatial distribution pattern of the O.glaberrima population in Gudoushan was mainly affected by the high mortality rate and the negative density dependence of saplings and middle-age trees.It was suggested to strengthen in situ conservation by appropriately create forest gaps,and reduce the density of saplings in combination with ex situ conservation,so as to promote the population regeneration of O.glaberrima.关键词
珍稀濒危植物/光叶红豆/径级结构/空间分布格局/就地保护/迁地保护Key words
rare and endangered plant/Ormosia glaberrima/size structure/spatial distribution pattern/in situ protection/ex situ protection分类
农业科技引用本文复制引用
覃俏梅,梅启明,吴林芳,曹洪麟,王锋..广东江门古兜山保护区光叶红豆种群径级结构与空间分布格局[J].广西科学院学报,2023,39(4):426-432,7.基金项目
2023年度广东省自然资源事务专项(生态林业建设项目)资助. （生态林业建设项目）
