中文摘要：

潮汐浸淹是影响红树植物分布的最重要因素之一，笔者从基径、高度、冠幅及分布密度等方面比较分析了海南东寨港不同潮间带的角果木种群特征。结果表明，不同潮间带的角果木因潮水浸淹程度各异：（1）不同潮间带的角果木种群幼苗比例均最大，属稳定型种群或稳定增长型种群，但密度差异悬殊：外带986株·hm-2、中带43873株·hm-2、内带141360株·hm-2；（2）不同潮间带的角果木种群基径、冠幅相差不大，但高度差异显著：从内带至外带，角果木种群在高度整体上呈现出变高的趋势；（3）外带角果木种群偏向于随机分布，中带和内带角果木种群为聚集分布；（4）在种群格局动态方面，外带苗木阶段为聚集分布，小树和成年树均为随机分布，但中带和内带的角果木的苗木和小树呈聚集分布，成年树为随机分布。

英文摘要：

Tidal flooding is one of the most important factors that affect the regional distribution of mangrove tions in different tidal zones of Dongzhaigang Harbour in Hainan Island were observed and determined for comparative analysis. C. tagal populations among different tidal zones were found different obviously in the population structure, distribution and distribution pattern as the extent of tidal flooding varied. The seedling populations of C. tagal had the highest proportion in all the tidal zones and grew as stable or steady-growing populations, but their densities were highly different： 986 plants/hm2 in the external tidal zone, 43 873 plants/hm2 in the mid- dle tidal zone, and lgl 360 plants/hm2 in the inner tidal zone. The basal stem diameter and the crown structure of the C. tagal populations were not obviously different, but the height was obviously different ： C. tagal popula- tions tended to grow higher from the inner to the external tide zones. C. tagal populations tended to be distribu- ted randomly and were aggregately distributed in the middle and inner tidal zones. For the dynamics of spatial distribution patterns of the C. tagal populations the seedlings were aggregately distributed while the young and mature trees were scattered randomly in the external tidal zone, but the seedlings and young trees were aggregate- ly distributed and the mature trees randomly distributed in both the middle and inner tidal zones.