Research on Damaging Effect of Macfadyena unguis-cati (L.) A.Gentry in the Gulangyu Island
通过野外调查, 分析了入侵植物猫爪藤在鼓浪屿分布现状及危害状况.结果表明:①受猫爪藤危害的树种有41 种, 猫爪藤的危害降低了鼓浪屿原有的生物多样性和优美的植被景观, 严重破坏了国家风景名胜区的生态平衡; ②根据受猫爪藤危害的林地面积及乔木受害的程度, 将受害等级分为 5 级. 其中, 受害最严重的生长地点为: 笔山路 7号、殷承宗家旁、燕尾山、孔雀园、鼓新路以及钱币博物馆外等; ③造成危害的藤本植物还有五爪金龙、老鼠拉冬瓜、心叶落葵薯、珊瑚藤、鸡屎藤等.这些种类或以单种, 或与猫爪藤混生构成不同的组合对风景林木造成危害.从危害程度看,猫爪藤最严重, 其次是五爪金龙和老鼠拉冬瓜. 采用生态制图表达了猫爪藤的分布与危害状况, 为综合防治与植被恢复、建立动态的生态监测和预警、预报系统提供基础.Through a comprehensive field investigation, the distribution of the invasive species-- Macfadyena unguis-cati (L.) A.Gentry in the Gulangyu Island located in Xiamen city has been analyzed, and the detrimental effects upon the native species have been figured out. The survey results indicate that: ①41 tree species are suffered from M.unguis-cati. M.unguis-cati has decreased species diversity dramatically, destroying the beautiful landscape of the Gulangyu Island and the ecological equilibrium in the State key Beauty Spot. ②5 damage levels could be divided according to the damaged area and the extent of damage to tree species. The areas that are damaged by M.unguis-cati the most badly are detected. ③M.unguis-cati can make damages on tree species together with other vine species, such as Ipomoea plamata、Solena amplexicaulis、Anredera cordifolia、 Antigonon leptopus and Paederia scandens. Among those vines, M.unguis-cati imposes the greatest damage, and I. plamata and S. amplexicaulis also impose great damages on tree species. Eco-graph analysis could be deployed to figure out the spread and damage condition brought by M.unguis-cati in order to offer a basis for the setup of ecological investigation and guard system of the Gulangyu Island and to yield necessary information for bio-system protection and vegetation restoration.