【摘要】 由于火山岩特殊的自然地理条件,其植被的组成与分布也具有特殊性。野外调查表明,湛江火山沟共有维管束植物238种,含种类较多的科为菊科、大戟科、禾本科、蝶形花科、桑科和芸香科。较重要的物种有大果榕、对叶榕、樟树、幌伞枫、假苹婆、桃金娘、野牡丹、鸭脚木、厚皮树等,它们在植被的组成与演替中起着举足轻重的作用。值得注意的是,外来入侵种在本区占有较大比例,这与本区的地理位置和日益增长的外贸、旅游交流等密切相关。该文对植被的组成、外来入侵种的危害作了分析与探讨,并提出了相应的保育措施。更多还原

【Abstract】 Because of the particularity of geographic condition in lava,the composition and distribution of vegetation are different from others. A survey of distribution and composition of plant in Volcanic Vally in Zhanjiang,Guangdong was undertaken to provide a basis for management. The results show that:The families are dominant with Compositae,Euphorbiaceae,Poaceae,Pittosporaceae,Moraceae and Rutaceae;Some species,such as Ficus auriculata,F.hispida,Cinnamomum camphora,Sterculia lanceolata,Heteropanax fragrans,are more important than other species in vegetation composing and succession. In addition,the rate of invasive alien species are higher,the locality,increased trade and eco-tourism are responsible for so many species introducing from other areas.更多还原