海南俄贤岭石灰岩山地海南凤仙花所在群落植物区系及生态特征

Floristic and Ecological Characteristics of the Community with Impatiens hainanensis in Exianling Limestone Moutain,Hainan

通过样方调查对海南俄贤岭石灰岩山地海南凤仙花Impatiens hainanensis所在群落的植物区系及生态特征进行了分析.结果表明,在总面积为800 m2的样地中,共记录了维管植物46科76属83种(含种下单位),以兰科(16种)、水龙骨科(5种)和大戟科(4种)等为优势.属的区系成分以泛热带分布(18属)和热带亚洲(印度-马来西亚)分布(15属)为主.群落以灌木层(29种)和草本层(45种)为主,灌木层以海南大戟Euphorbia hainanensis为优势,草本层以玫瑰毛兰Eria rosea占优势;藤本层植物9种,以眼树莲Dischidia chinensis为优势.生活型以矮高位芽(57种)为主.频度等级分布规律为A>B>D>C>E,属于A级的种类最多,有41种,其中草本层20种.与相同生境的海南大戟灌丛群落进行了比较,并对其有效保护提出了初步建议.

Floristic and ecological characteristics of led based on community investigation in Exianling were 83 vascular species, subspecies, and varieties the community with Impatiens hainanensis were studlimestone moutain, Hainan. The result showed there belonging to 76 genera and 46 families in 8 plots with a total area of 800 m2. The dominant families were Orchidaceae （including 16 species）, Polypodiaceae （5 species）, and Euphorbiaceae （4 species）. The distribution types of the genera in the community were mainly Pantropic（ including 18 species） and Tropic Asia （India-Malasia） （15 species）. The shrub layer （including 29 species） and herb layer （45 species） were the main component of the community. There were 9 species in the liana layer. The dominant species of shrub layer, herb layer, and liana layer were Euphorbia hainanensis, Eria rosea, and Dischidia chinensis, respectively. The life form in the community was dominated by nanophanerophytes （including 57 species）. The order of the frequency distribution class was A 〉 B 〉 D 〉 C 〉 E. The A-level frequency was dominant（ including 41 species）. The community characteristics between I. hainanensis and Eu. hainanensis were compared. Some preliminary suggestions were also put forward on how to effectively protect L hainanensis.