防城金花茶国家级自然保护区肉实树种群不同龄级的空间格局与关联性  

Spatial Pattern and Spatial Association of Sarcosperma laurinum Population at Different Age Classes in Fangcheng Golden Camellia National Nature Reserve

作　　者：陈善栋 李武峥 廖南燕 苏宏新 潘韦虎 蔡中伦 Chen Shandong;Li Wuzheng;Liao Nanyan;Su Hongxin;Pan Weihu;Cai Zhonglun(Guangxi Normai University,College of Life Science,Guilin 541006;Guangxi Fangcheng Yellow Camellia National Nature Reserve Management Center,Fangchenggang 538021;Nanning Normal University,Nanning 530001,China)

机构地区：[1]广西师范大学生命科学学院,广西桂林541006 [2]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 [3]南宁师范大学,广西南宁530001

出　　处：《国土与自然资源研究》2024年第5期93-96,共4页Territory & Natural Resources Study

基　　金：防城金花茶自然保护区维管植物多样性及其保护研究(2022-HT/XY-60)。

摘　　要：为掌握防城金花茶国家级自然保护区内肉实树种群的发展动态,以妹仔田1 hm2动态检测样地内的肉实树个体的空间分布坐标点图为基础,并依据肉实树的龄级结构分布(幼苗、幼树、中树、成树),采用Ripley G函数对种群的分布格局及种内关联展开分析。结果显示,(1)肉实树的龄级结构为单峰型分布。(2)幼苗和成树为随机分布,幼树和中树在小尺度上为聚集分布,在大尺度为随机分布。(3)幼苗和幼树、中树、成树为空间不相关,幼树、中树、成树三者在小尺度上为空间正相关,大尺度上为空间不相关。这些发现说明,该种群属于稳定型,空间格局受到尺度效应、竞争作用、生境异质性、Jazen-Connell效应等因素的综合影响。In order to understand the population dynamics of the Sarcosperma laurinum in Fangcheng Golden Camellia National Nature Reserve,the spatial pattern and spatial association of the populationwase analyzed by using the Ripley G function based on the point maps of Sarcosperma laurinum individuals in the 1 hm2 plot in Meizaitian,and their age-classes(seedling,sapling,medium,and mature).The results showed that,(1)the age-classes of Sarcosperma laurinum were single peak figure.(2)Seedlings and adult trees were randomly distributed,while young and medium trees were clustered at small scales and randomly distributed at large scales.(3)Spatial association between seedlings and sapling,medium,mature trees were negtive.Spatial association of sapling,medium,mature trees were positive in small scales,and as the scales increased,shifted positive to not significant.These results suggest that the population is stable and that the spatial pattern is influenced by a combination of scale effects,competitive effects,habitat heterogeneity,and the Jazen-Connell effect.

关 键 词：肉实树种群 龄级 空间分布格局 

分 类 号：S79[农业科学—林木遗传育种]