海南岛无翼坡垒林植物物种多样性和物种空间配置研究

从群落最小面积、绝对植物物种多样性和植物物种多样性指数等三个方面的测定，研究海南岛无翼坡垒林的植物物种多样性．其结果是，群落最小面积为３５００ｍ２，在这个面积范围里，１．５ｍ高以上的立木有１２６种；物种多样性指数Ｄｓ－ｗ＝５．０３．从群落物种分布的均匀度、各物种的频度和群落的垂直分布状况，研究该森林的物种空间配置，结果表明：群落的均匀度Ｊｓ－ｗ为７１．７６，频度分布规律力Ａ＞Ｂ＞Ｃ＞Ｄ＞Ｅ（按Ｒａｕｎｋｉａｅｒ频度级），其特征是Ａ级所占的比例很大，约占总数的７４．６％；垂直分布状况表明，无翼坡垒林整个群落的个体高度比例基本上是“金字塔”型，但仍有一定的波动性．

Study on the Plant Species Diversity and Distribution of the Hopea exalata Forest on Hainan Island

Hopea exalata forest is located in Mt.Gan shiling, Hainan Island.Hopea exalata is a singledominant species in the forest,but the forest also has more complicated compositions consisting of 1144 species and the minimal area is 3 500 m2,the species diversity(Ds-w)is 5. 03.The species evennees(Js-w = 71. 76) is lower than other tropical rain forest,and the structure of plant community has some fluctuation.