海南岛橡胶林群落与青梅林群落物种组成特征分析

橡胶林在海南岛分布较广，是海南岛重要的植被类型之一，在海南热带森林生态系统中占有非常重要的地位；同样青梅林在海南热带森林生态系统中地位也极其重要。本文分析海南岛橡胶群落与青梅林群落物种组成与区系成分特征，结果表明：（1）在调查面积为10 400 m2橡胶林样地内共有种子植物91科296属450种；在调查面积为3 600 m2的青梅林样地内共有种子植物45科84属94种。（2）橡胶林群落主要由大戟科、禾本科、茜草科、蝶形花科和菊科组成；青梅林群落主要由茜草科、大戟科、豆科、番荔枝科和无患子科组成。（3）橡胶林群落热带成分的科有58个，占总科数的63.7％，青梅林群落热带成分的科34个，占总科数的75.6％，表明了橡胶林群落和青梅林群落同样都具有热带性质。（4）橡胶林中热带亚洲的属37个，占总属数的12.5％；青梅林群落中热带亚洲的属22个，占总属数的26.2％，表明青梅林群落热带亚洲亲缘性较强。（5）海南橡胶林群落世界广布科有24个，占总科数的26.1％，世界广布的属有14个，占总属数的4.8％，分别高于青梅林群落的15.6％和1.2％，橡胶林群落世界广布分布比例较高表明了其群落过渡性的特点。

Flora Composition of Tropical Rubber Forest and Vatica mangachapoi Forest of Hainan Island

Tropical rubber forest, one of the most important vegetation, is widely distributed in Hainan Island. Also Vatica mangachapoi forest is extremely important in tropical forest ecosystem in Hainan. In this paper, the species composition and distributions types and of plant species in rubber forests in Hainan Island were analyzed. The results showed that(1)There are 91 species in 296 genera and 450 families in plot with a survey area of 10 400 m2 in rubber forest. And there are 94 species in 84 genera and 45 families in plot with a survey area of 3 600 m2 in Vatica mangachapoi forest.(2)Rubber forests are mainly composed of Euphorbiaceae, Gramineae, Rubiaceae, Papilionaceae and Compositae. Vatica mangachapoi forest is mainly composed of Rubiaceae, Euphorbiaceae, Leguminosae, Annonaceae and Sapindaceae.(3)There are 58 tropical families in rubber forest, taking up about 63.7% of the total families. And there are 34 tropical families in Vatica mangachapoi forest, occupying about 75.6% of the total families. The flora of rubber forest and Vatica mangachapoi forest are mainly composed of species in tropical families indicating their tropical infinity.(4)There are 37genera of tropical Asia(12.5% of total genera)in rubber forest and in 22 genera(26.2% of total genera)in Vatica mangachapoi forest. The higher percentage of genera of tropical Asia in Vatica mangachapoi forest indicates its strong tropical Asian affinity.(5)There are rubber 24 families(26.1%)and 14(4.8%)general belong to cosmopolitan in rubber forest respectively, which are much higher than those of Vatica mangachapoi forest(15.6% and 1.2%). The percentage of cosmopolitan in rubber forest was much higher than Vatica mangachapoi forest indicating the transitional characteristics of rubber forest community, implying the characteristics of transitional community.