平潭9个无居民海岛种子植物区系及外来植物影响

Seed Plants Flora and the Impact of Exotic Plants on 9 Uninhabited Islands in Pingtan

为了解岛屿植物资源对海岛植被保护和生态恢复具有重要意义,采用样线法对平潭9个无居民海岛植物资源进行了调查,结果表明:平潭9个无居民海岛共有种子植物60科137属155种,平潭无居民海岛生境条件恶劣,植被类型单一,优势科现象不明显。植物地理成分表明,平潭无居民海岛种子植物以热带成分为主,热带亲缘显著,符合其所处的亚热带地理分布特点。平潭无居民海岛分布有外来植物32种,其中外来入侵植物9种,多通过人为栽培引种进入岛屿。总体而言,平潭无居民海岛以原生植物为主,但外来入侵植物需要引起注意。同时,针对平潭无居民海岛拥有较多的滨海特色植物,提出了可以考虑将其引种驯化,作为海岛植物应用的建议。

Understanding the island plant resources is of great significance to the island plants protection and ecological restoration.In this study,the sample line method was used to investigate the plant resources of 9 uninhabited islands in Pingtan.The results show that:there are 155 species of seed plants belonging to 137 genera and 60 families in 9 uninhabited islands of Pingtan.The habitat condition is bad;the type of vegetation is single,and the phenomenon of dominant family is not obvious.The geographical composition of the plant shows that Pingtan uninhabited islands seed plants are mainly tropical elements,which are closely related to the tropics and accords with the geographical distribution characteristics of the subtropics.There are 32 species of exotic plants in Pingtan uninhabited islands,of which 9 species of invasive plants are introduced into the island through artificial cultivation.Generally speaking,the uninhabited islands of Pingtan are mainly native plants,but exotic invasive plants need to be paid attention to.At the same time,Pingtan uninhabited islands have more coastal characteristic plants,which can be introduced and domesticated to provide suggestions for the application of island plants.