Flora Composition of Seed Plants in Rubber Forests in Hainan Island
As one of the most important vegetations in Hainan Island,China,tropical rubber plantations are widely distributed. Understanding of the plant flora in rubber plantation is imperative to understand the e-cosystem of the plantations. In this paper,the types and distributions of understory plant species in rubber plantations in Hainan Island were surveyed and analyzed. 1) There are 91 families including 296 genera and 450 species,of which five are dominant families (Euphorbiaceae,Gramineae,Rubiaceae,Papilionaceae,Com-positae) with more than twenty species. Euphorbiaceae is the largest family with 38 species,occupied 8% of the total family. Also,there are six dominant genera with more than five species,occupied only 2. 0% of the total genera. 2) There exist 58 tropical families and 269 tropical genera in the plantations, taking up about 63. 7% of 90. 9% of the total families and genera,respectively. The flora of the plantations is mainly composed of the species in tropical families and genera indicating the tropical infinity. Also,there are 39 genera of tropical Asia,taking up 11. 9% of the total genera,which indicates the tropical Asia infinity. 3) In addition, the percentage of cosmopolitan the plantations in Hainan is so high,which indicating the transitional characteristics of rubber plantation community.
国家科技期刊平台
NSTL
万方数据
维普
