海南岛尖峰岭热带山地雨林的群落结构特征

本文讨论了海南岛尖峰岭热带山地雨林乔木层的群落结构的一些基本特征，结果表明：热带山地雨林种类成份复杂，生物多样性指标高，原始林的Shannon－Wiener多样性指数（乔木层）为5．8—6．3，而更新林则在4．5—4．8之间，均匀度指标均在81％以上，反映了优势种群不明显的特点。群落组成种类以热带成份占优势，达80％以上。乔木层的胸径和树高分布均合理；群落组成种群的频度分布不同于RaunKiaer提出的频度定律，而是以A＞＞B＞C＞DE→0（原始林）和A＞＞B＞C＞D→0＜E（天然更新林）的形式存在，并且以A级频度占绝对优势，反映了热带林在世界植被中的特殊性。

COMMUNITY CHARACTERISTICS OF TROPICAL MOUNTAIN RAIN FOREST IN JIANFENGLING, HAINAN ISLAND

Some basic characteristics of tropical mountain rain forest communities with emphasis only on tree layer of primary and regenerated stands in Jianfengling, Hainan Island, were studied since 1983. The results indicated that the forest communities showed rich floristic composition, and high diversity index being up to 5.8-6.3 for 2 primary stands and 4.5-4.8 for 3 regenerated stands as calculated by the Shannon-Wiener diversity index.Over 8O% of the total genera in the conununities were of tropical components. The diameter at breast height and tree height classes showed a reasonable distribution in the primary and regenerated stands. Based on the results of frequency measurement, the frequency va1ues of most tree populations (more than 8o% of the totals) were less than O.2 in the communities,and the frequency distribution showed the special pattern that was different from the Raunkiaer's Frequency Law.