摘 要(英文)：What type of ecosystemsmore vuinerabie than the others in herms of inpact of invasive species? It is one of the focuses ofmodern species invasion ecology. Our survey on the invasive p lants on 8
islands in northeastern water of Hong Kong(114°15′～114°27′E, 22°30′～22°34′N) was carried out recently. The results shown that the islands( including Island SaiAp Chau, Island Ap Lo Chun and Island Ap Chau) with calcium2rich soilmight be more invasible than other islands ( including Island Lam Shuen Pai, Island FuWong Chau, Island Ngo Mei Chau, Island WongWan Chau) with low calcium soil. Although there are may more species of invasive p lants in Island Kap O, the abundance of exotic plants is low and did not cause significant harm to the natural vegetation. Based on comparison of the invasive p lants and island area, human disturbance and soil component, the results p resented herewith on the relstionship between calcium and the fact that limestone, saline, beach, calcic soil thatwidely distributed in temperate zone and arid soil formed inMediterranean Sea Climate was easily invaded by the invasive plants.
香港东北角吉澳群岛入侵植物调查