福建梁野山国家级自然保护区种子植物区系研究

通过野外调查、采集标本和查阅相关文献资料,编制福建梁野山自然保护区野生种子植物名录,进行植物区系组成和分布区类型的分析,并将其与周边相邻2个保护区的植物区系进行比较。结果表明:(1)梁野山自然保护区共有野生种子植物154科662属1 498种,种类丰富。(2)区系地理成分以热带分布型为主,其中在科级水平上热带分布型所属科共有85科,占总科数的69.67%;在属级水平上热带性质分布型的属有371属,占总属数的60.82%。但相当数量温带成分的存在,体现了亚热带植物区系的特点。(3)对梁野山保护区与周边相邻的武夷山和南靖南亚热带雨林保护区的植物区系比较发现,梁野山种子植物区系属数的热带属数/温带属数(R/T值,1.66)高于武夷山的R/T值(1.10)而低于南靖南亚热带雨林保护区的R/T值(2.68),梁野山种子植物区系与该相邻2个保护区的相似性系数非常接近,但在区系成分上,梁野山既有与武夷山共有而南靖南亚热带雨林保护区没有分布的温带成分,也有与南靖南亚热带雨林保护区共有而武夷山没有的热带成分,说明梁野山植物区系与其地处武夷山脉南端的地理位置相一致,具有明显的从南亚热带向中亚热带过渡的特点。

Seed Plant Flora of Liangyeshan National Nature Reserve in Fujian Province

Based on field investigation,specimen collection and relevant literature data,we compiled a list of wild seed plants of Liangyeshan Nature Reserve in Fujian province,and analyzed the composition of seed plant flora and its geographical distribution types of families and genera,and the results were compared to two neighboring nature reserves.The results showed that:(1)There were totally 1 498 natural seed plant species belonging to 662 genera and 154 families in Lingyeshan Nature Reserve,which was abundant in plant species.(2)Tropical elements were the dominant components of the flora,but a large number of temperate elements reflecting subtropical flora characteristics.At family level,85 families belonged to tropical elements and accounted for 69.67% of the total families.At genus level,371 genera belonged to tropical elements and accounted for 60.82% of the total genera.(3)Compare to two neighboring nature reserves,R/T (number of tropical elements/number of temperate elememts) ratio of genus in the region (1.66) was higher than that in the Wuyishan Nature Reserve (1.10),but lower than that in the southern subtropical rainforest in Nanjing (2.68).Floristic similarity coefficients between this region and the two neighboring nature reserves were very close.Liangyeshan Nature Reserve not only shared common temperate floristic components with Wuyishan Nature Reserve which were not found in subtropical rainforest in Nanjing,but also shared common tropical floristic components with subtropical rainforest in Nanjing which were not found in Wuyishan Nature Reserve.This indicated that flora in the region was consistent with its geographic position at southern Wuyishan Mountains,and that it was geographically a transitional area from south subtropical to mid-subtropical.