平潭大屿岛植物资源及其多样性研究

Wild plant germplasm and biodiversity in Dayu Island, Pingtan

对平潭无居民岛大屿岛进行全面勘察,调查其植物资源及其群落多样性。大屿岛共37科59属63种植物,其中木本27种,草本36种。对海岛植物种类组成、生活型、植物区系、群落结构特征及其多样性进行分析,结果表明:(1)无居民海岛面积小,海岛环境易变导致植物物种种类偏少;(2)海岛植物属地理起源具有一定复杂性。海岛植被异于陆地植被体现在海岛植物主要以高位芽植物占优势,比例较陆地植被小,且主要优势科属有所区别;(3)海岛植被受到一定生态干扰,外来植物占7.94%,黑松和海边月见草在该群落中占优势;(4)海岛植物群落结构简单,多样性偏低。

The wild plant germplasm and their community biodiversity in Dayu Island, Pingtan were investigated. Results showed that seed plants consist of 63 species belonging to 59 genera of 37 families. Of which, 23 genera are woody and 36 are herbaceous. Analyses of plant life form, flora, and community structure showed that： （1）The small size of the desert island and its changeable environment resulted in less plant species. （2）The genus origion of island plants was complex. There were differences between island plants and land plants in the propor- tion of phanerophytes plants in communities and the dominant family and genus. （3）The vegetation of island was eco-disturbed, The proportion of introduced plants including Pinus thunbergii, Oenothera drummondii predomi- nated in communities, occupied by 7.94%. （4）The community structure was simple and the biodiversity was low in Dayu Island.