中文摘要：

【目的】分析海南岛文昌市铜鼓岭自然保护区5种蒲桃属植物的种群结构、分布格局及种间关联性，以期了解该地区蒲桃属植物种群的现状、分布状况及发展动态，为该属植物的保护工作提供依据。【方法】在热带常绿季雨矮林建立2.56 hm2固定样地，采用种群结构和空间格局常用的种群径级结构分析、种群静态生命表和绘制种群存活曲线研究方法，结合点格局分析中的Ripley’s K函数和SPSS软件，对5种蒲桃属植物种群的空间格局、种间关联性以及种群聚集规模与种群优势度的关系进行研究。【结果】种群死亡率随龄级的增加而增大，生命期望值ex与此趋势相反，但方枝蒲桃、赤楠和肖蒲桃3个种群中的 ex值会出现明显的小波动，说明这3个种群内部经历了密度调节过程，使种群密度达到适合个体生长的最佳状态；方枝蒲桃种群具有最多的个体数目（1950株），并集中于幼苗和幼树，表明该种群更新良好，存活曲线随着龄级增大逐渐趋于 Deevey-Ⅱ型，说明种群将长期保持稳定的种群死亡率并更新繁衍下去；其他4个种群的总个体数相差不大（假赤楠374株、赤楠390株、子凌蒲桃393株、肖蒲桃282株），尽管它们的存活曲线最终都趋于 Deevey-Ⅰ型，但存在差异，假赤楠的幼苗、幼树数量较少（共82株），虽然其更新木一般都可以生长到生理寿命（ Deevey-Ⅰ型），但过少的数量也可能会影响种群的正常繁衍，其他3个种群都具有一定规模的幼苗和幼树，种群更新能力上虽不及方枝蒲桃，但在群落中也具有相当大的生存潜力；总体上，5个种群的空间分布都符合种群普遍格局分布规律，即由小尺度的聚集分布到大尺度上的随机乃至于均匀分布，但假赤楠、子凌蒲桃和肖蒲桃在某些尺度范围内出现了规则分布，说明在这些尺度上可能存在其他种群带来的竞?

英文摘要：

[Objective]The study was intended to understand population structure and spatial patterns of 5 species of Syzygium in tropical evergreen monsoon elfin forest of Tongguling Natural Reserve,Hainan Wenchang.[Method]A 2. 56 hm2 permanent sample plot was established in tropical evergreen monsoon elfin forest. Common methods for population structure and spatial patterns were used： analysis of population structure of diameter-class,static life table,survival＆nbsp;curve,function Ripley’s K that was part of spatial point pattern analysis and SPSS software were applied in the study. Spatial pattern,inter-specific association,and relationships of aggregation scale and dominance of five typical Syzygium plant species were studied by using function Ripley’s K and software SPSS. [Result]Mortality of population increased along with the increase of age-class,but the life expectancy was opposite to this trend. . Evident fluctuations of the value of life expectancy were found among three species Syzygium tephrodes,S. buxifolium and S. acuminatissimum,this phenomenon indicated that density regulation process might have existed in the three species,so that density of populations could achieve the best growing condition for individual trees. The largest number of trees were found in S. tephrodes （1 950 trees）,and most of them were seedlings and young trees,indicating good regeneration of the population. Survival curve tended to gradually close to the model Deevey II with increase of the age-class,indicating a stable mortality was maintained and regeneration allowing the population continue to survive. The total number of individual trees did not significantly differ among the other 4 species （374 trees of S. buxifolioideum,390 trees of S. buxifolium,393 trees of S. championii,and 282 trees of S. acuminatissimum） . Although their survival curve tended to close to the model Deevey I, there were yet some differences among these species. For example,there were fewer seedlings and young trees （82 trees） in the populati