摘要 三亚红树林分布于铁炉港、榆林河、三亚河及青梅港等地，总面积为73公顷。历史上榆林港红树林面积在320公顷左右，现存红树林主要分布于榆林河主河道沿岸，面积5.6公顷。 就各物种而言，榆林河红树林处于比较健康的状态，表现为：①现存个体未见明显的生长不良，开花结果正常，也没有明显的病虫害；②各物种更新情况良好；③榆林河两岸保存了大量的红树植物古树，绝大部分古树长势良好；④红树林林相基本完整，保持了较好的河岸红树林景观。结合红树植物群落发育、树种更新及树种丰富度等指标，得出如下结论： 一：榆林港红树林代表了三亚红树林的最高水平，应该优先得到保护。 二：青梅港红树林受地形改变、污水排放等因...Abstract Mangroves in Sanya are distributed in Tielu Port, Yulin River, Sanya River and Qingmei Port etc., which total area are 73ha. In history, the area of mangrove in Yulin Port is about 320ha. Whilet the existing mangrove forest are mainly distributed in main channel coast of Yulin River and the area is 5.6ha. For each the species, mangroves in Yulin River are relatively healthy, which is il...学位：理学硕士院系专业：生命科学学院生物学系_植物学学号：2012005130197
