江苏省灌南县陆生维管植物多样性及区系特征分析

Analysis of the Diversity and Floristic Characteristics of Vascular Plants of Guannan County,Jiangsu Province

在对灌南县进行全面的野外实地调查研究的基础上,结合相关文献资料,对灌南县陆生维管植物多样性进行研究,并对植物区系特征进行了分析。结果表明,灌南县共有陆生维管植物78科244属330种,包括蕨类植物2科2属3种,裸子植物共计3科5属5种,被子植物73科237属322种,其中双子叶植物共计61科186属256种,单子叶植物共计12科51属66种。灌南县草本植物种类最为丰富,共计237种,占全部种类的71.8%。从科、属的组成来看,灌南县陆生维管植物科组成以分布2~5种的寡种科和仅分布1种的单种科占优势,两者共占总科数的82.1%;属组成以分布2~5种的寡种属和仅分布1种的单种属占优势,两者共占总属数的99.2%。灌南县植物资源以观赏、食用、药用以及材用为主,具有较高的开发利用价值。灌南县共有野生维管植物52科159属219种,其中科的地理成分共分为5个类型,以热带性成分占明显优势;属的地理成分包括14个分布区类型,以温带成分占优势,同时热带成分也占据较大的比例,该植物区系具有明显的由北亚热带向暖温带过渡的趋势及特点。调查研究结果可以为灌南县植物资源的保护管理和开发利用提供基础科学资料。

Based on comprehensive field investigation and related literature,the diversity and floristic characteristics of vascular plants in Guannan County of Jiangsu Province were analyzed.The results showed that there were 330 species of vascular plants,belonging to 244 genera 78 families.Among them,there were 3 species of ferns in 2 genera of 2 families,5 species of gymnosperms in 5 genera of 3 families,and 322 species of angiosperms in 237 genera of 73 families which included 256 species of dicotyledons in 186 genera of 61 families and 66 species of monocotyledons in 51 genera of 12 families.The herbaceous plants in Guannan County were the most abundant with 237 species,accounting for 71.8%of the total species.In terms of the composition of families and genera,families consisting of 2-5 species and 1 species were dominant in the composition of vascular plant families,accounting for 82.1%of total number of families;genera consisting of 2-5 species and 1 species were dominant,accounting for 99.2%of total number of genera.The plant resources of Guannan County are mainly used for ornamental,edible,medicinal and material,and have higher development and utilization value.In addition,there were 219 species of wild vascular plants in Guannan County,belonging to 52 families and 159 genera.The families geographical areal-types were classified into 5 types,and the tropical components were predominant.The genus geographical areal-types were classified into 14 types,and temperate components were dominant,while tropical components also accounted for a larger proportion.The flora possessed an obvious transition tendency and characteristics from north subtropical zone to warm temperate zone.The research results could provide fundamental scientific information for the conservation and management,development and utilization of plant resources in Guannan County.