特呈岛天然红海榄地径分布规律研究  

Study on Diameter Distribution of Rhizophora stylosa Natural Forest in Techeng Island

作　　者：周元满[1] 黄剑坚[1] 聂页[1] 刘美欣[1] 叶沛栋[1] 王财[1] 

机构地区：[1]广东海洋大学农学院,广东湛江524088

出　　处：《西南大学学报（自然科学版）》2013年第3期52-57,共6页Journal of Southwest University(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(10152408801000021);广东省科技厅科技计划资助项目(2008A030203007)

摘　　要：以特呈岛红树林自然保护区中的红海榄纯林、红海榄+白骨壤、红海榄+木榄以及红海榄+木榄+白骨壤混交林中的红海榄为对象,采用正态分布、对数正态分布,Weibull分布,β分布,Γ分布函数及地径分布特征数对红海榄的地径分布规律进行拟合与分析.结果表明:5种分布函数对不同群落类型中红海榄地径分布的拟合效果不同,β分布能较好地描述红海榄的地径分布规律,拟合效果最好;不同群落类型中红海榄地径分布的偏度均为正偏,峰度大部分为负值;随着林分平均地径的增大,相对最小地径值呈递增趋势,而相对最大地径值呈递减趋势.Five probability models, i. e. normal distribution, log-normal distribution, Weibull distribution,beta distribution and gamma distribution, were applied to analyze the structure features and diameter dis- tribution of Rhizophora stylosa population in different communities （pure Rhizophora stylosa forest, R. stylosa ＋ Avicennia mixed forest, R. stylosa Jr Bruguiera gymnorrhiza mixed forest, R. stylosa ＋ Avi- cennia ＋ Bruguiera gymnorrhiza mixed forest） in Techeng island of Zhanjiang, Guangdong, and their di- ameter distributions were compared. The results showed that the fitting was different in different commu- nities with 5 distributions; the Beta distribution model had the best fitness to express the structure of di- ameter distribution of 17. stylosa population, skews were all positive and most of crests were negative. The comparative minimal diameter presented an increasing tendency with increased average diameters, and the comparative maximal diameter presented a decreasing tendency.

关 键 词：红海榄 地径分布 特呈岛 概率密度函数 

分 类 号：Q949.761.7[生物学—植物学]