福建省连江县6个海岛维管植物资源调查与分析

Investigation and Analysis of Vascular Plant Resources on 6 Islands in Lianjiang,Fujian,China

在通过野外调查和查阅相关资料的基础上,对福建连江6个海岛的植物资源进行调查分析。结果表明:(1)6个海岛植物资源丰富,共记录维管植物217种,隶属于74科186属;其中被子植物占据优势,共64科174属202种;优势科明显,分别为菊科(Compositae)、禾本科(Gramineae)。(2)6个海岛生长型以草本为主;生活型以高位芽植物、地面芽植物和一年生植物居多;叶性状以单叶、全缘叶、叶被毛、纸质叶、小型叶占优势;果实类型以蒴果和瘦果占比高。(3)目屿岛的植物种类最丰富,共52科91属95种;物种数最少的是蛤沙青屿,仅为21科35属37种;目屿岛与蛤沙青屿的植物种类差异率最高,为61.05%,与兀屿岛的植物种类差异率最低,仅为1.05%。(4)6个海岛外来入侵植物共12科21属24种,占总种数的11.06%。其中以菊科和草本为主,外来入侵植物最多的是金牌岛,共15种,占外来入侵植物总种数的62.50%。本次调查掌握了这6个海岛的植物资源概况和植物功能性状特征,为研究区植物资源的保护与合理开发利用,以及海岛植被修复提供参考依据。

On the basis of field investigation and relevant materials,the plant resources of 6 islands in Lianjiang were investigated and analyzed.There were abundant plant resources in the 6 islands,distributed in 74 families,186 genera and 217 species.202 species belonging to 174 genera and 64 families were angiosperms,which were dominant.The dominant families were Compositae and Gramineae,respectively.The growing type of 6 islands was mainly herbaceous.Most of the life types were Phanerophyte,Hemicryptophyte and Therophyte.Leaf characters were dominated by simple leaf,entire leaf,pilous leaf,papery leaf and small leaf.The fruit type is higher in capsule and achene.There were the most abundant plant species in Mu Island,with 95 species in 91 genera and 52 families.The least number of species was in Ha shaqin Island,only 37 species belong to 21 families and 35 genera.The difference rate of plant species between Muyu Island and Ha shaqinyu Island was the highest(61.05%),and that between Muyu Island and Wuyu Island was the lowest(1.05%).There were 24 species alien invasive plants in 6 islands,distributed in 12 families and 21 genera,which accounting for 11.06%of the total species.Compositae and herbs were the main species.There were the most invasive alien plants in Jingpai Island,with 15 species,accounting for 62.50%of the total invasive alien plants.In this survey.The general situation of plant resources and plant functional characters of the six islands would provide reference for the protection and rational development and utilization of plant resources in the study area,as well as island vegetation restoration.