海南霸王岭青梅林群落藤本植物的物种组成特征

Lianas Species Composition in Vatica mangachapoi Forest in Bawangling,Hainan Island

木质藤本是森林,尤其是热带、亚热带森林中重要的组成成份。现基于海南岛霸王岭青梅林群落野外调查数据,初步分析了该群落藤本的组成特征。结果表明:(1)在所调查的3 600 m2样地中,有藤本25种(占物种数的25.53%)495株,分别隶属于18个科和22个属;(2)直径大于3 cm的藤本54株,红叶藤(Rourea minor)个体数最多,有21株(39.62%);直径≤3 cm的藤本441株,锡叶藤(Tetracera asiatica)个体数最多,有169株(38.32%);(3)349(70.51%)株藤本缠绕在乔木上,仅有146株(29.49%)没有缠绕在乔木树干上;(4)青梅上缠绕有藤本植物22种,占种类的91.67%,有个体284株,个体数的57.37%,而其它支持木个体数量较少,其上缠绕的藤本植物的种类和个体也较少,表明青梅林群落藤本植物并无严格的选择性。总之,由于干扰因素的存在,青梅林群落藤本植物的比例比较高,而藤本植物存在,必然会与青梅竞争光、水分等资源,从而影响青梅的更新和整个群落的演替,建议加强该地段青梅林的保护,从而提高群落的稳定性和多样性。

Woody lianas are important compositions of forest community, especially in tropical forests and subtropical forests. Based on the data collected from Vatica mangachapoi forest of Bawangling in Hainan, the lianas species composition of the community is analyzed. The results show that （1） In the 3600 m2 plot of Vatica mangachapoi forest, there are 25 species and 495 individuals, belong to 22 genus and 18 families. （2） Of the total individuals, 54 individuals have a DBH 〉 3 cm, Rourea minor is the most abundant species with 21 individuals （39.62%）; 441 individuals have a DBH ≤ 3 cm, Tetracera asiatica is the most abundant species with 169 individuals （38.32%）. （3） There are 349 （70.51%） individuals with host species, however only 146 （29.49%） without host species. （4） There are 22 lianas species and 284 individuals on the Vatica mangachapoi, occupying 91.67% of the total species and 57.37% of the total individuals respectively. Other species with few individuals have fewer lianas species and individuals, which indicates that lianas species do not have selectivity to tree species. In conclusion, the ratio of lianas species is relative high owing to disturbance. Lianas will compete against seedlings and saplings of Vatica mangachapoi for light and water resources. As a result of the competition, the regeneration and the whole community succession would be shit. So our proposal is to strengthen the protection of the community and enhance the stability and diversity of the community.