福建平潭5个无居民海岛种子植物的物种组成与区系分析  

Species composition and flora analysis of seed plants on five uninhabited islands in Pingtan,Fujian Province,China

作　　者：毛玥 王生生 许艳蓉 王晓盈 林希霆 邓传远[1] Mao Yue;Wang Shengsheng;Xu Yanrong;Wang Xiaoying;Lin Xiting;Deng Chuanyuan(College of Landscape Architecture,Fujian Agriculture and Forestry University,Fuzhou 350002,China)

机构地区：[1]福建农林大学风景园林与艺术学院,福州350002

出　　处：《植物科学学报》2024年第6期748-756,共9页Plant Science Journal

基　　金：海洋公益性行业科研专项(201505009);福建省区域发展科技项目(2018Y3006);福建农林大学科技创新专项(CXZX2019086)。

摘　　要：基于野外调查和标本鉴定,对福建平潭5个无居民海岛的种子植物进行物种组成分析与地理成分划分,并与不同地区海岛种子植物属的分布区类型进行对比,探讨了5个无居民海岛之间的物种相似性以及与岛屿空间特征参数的关系。结果显示:(1)5个海岛共有种子植物71科179属213种(含种下单位),剔除42个外来物种,共有种子植物65科145属171种,生活型以草本占比最高,其次是灌木、藤本和乔木。(2)在科、属、种水平上,区系类型主要由泛热带分布及其变型组成,热带、亚热带成分占比最高。(3)随着纬度的增加,植物区系具有从热带向温带过渡的特点,体现了海岛植物区系地理成分的纬向分异性。(4)属种相似性上,平潭5个无居民海岛间植物的物种相似度普遍较低。此外,岸线长度、高程和周长面积比等空间参数对海岛物种丰富度影响不显著。Based on field surveys and specimen identification,we analyzed the species composition and geographical distribution of seed plants from five uninhabited islands in Pingtan,Fujian.We compared the distribution patterns of seed plant genera from these islands with those from different regions and explored the species similarity among the five uninhabited islands,as well as the relationship with spatial characteristics of the islands.Results showed the following:(1)The five uninhabited islands contained 213 species of seed plants from 71 families and 179 genera(including infraspecific units).After excluding 42 exotic species,171 native species from 65 families and 145 genera remained,with herbaceous species comprising the largest proportion,followed by shrubs,lianas,and trees.(2)At the family,genus,and species levels,the prominent distribution types were pan-tropical and its variants,with tropical and subtropical components being the most represented.(3)Flora showed a tropical to temperate zone transition with increasing latitude,reflecting the latitudinal divergence in the geographical components of the island flora.(4)In terms of genus similarity,plant species similarity among the five uninhabited islands was generally low.In addition,spatial parameters,such as shoreline length,elevation,and perimeter/area ratio,also influenced species richness of the islands to some extent.

关 键 词：无居民海岛 植物区系 地理成分 种子植物 

分 类 号：Q948[生物学—植物学]