宝天曼国家级自然保护区种子植物物种多样性与区系分析

Species Diversity and Floristics Seed Plants in Baotianman Nature Reserve

宝天曼国家级自然保护区是伏牛山脉生物多样性最为丰富的地区,但该区域植物多样性及其植物区系与我国生物多样性热点地区的比较研究尚比较缺乏。为此,2019年4—10月,基于野外调查数据结合文献数据,对宝天曼国家级自然保护区的种子植物物种多样性和区系进行分析,并与我国热点地区的植物丰富度和植物区系进行比较。结果表明:(1)宝天曼国家级自然保护区共有种子植物163科890属2730种,分别占河南省种子植物科、属、种数量的95.9%、83%和72.3%,分别占秦岭种子植物科、属、种数量的98.8%、84.2%和71.1%,种子植物的物种丰富度在我国16个生物多样性热点地区中位居前列;(2)宝天曼国家级自然保护区的种子植物地理区系复杂,包含了15个分布类型和18个变型,其中热带分布共有245属593种,占非世界分布属的30.5%,温带分布523属1582种,占非世界分布属的65.0%,具有温带向亚热带过渡的性质;(3)宝天曼国家级自然保护区的植物区系与秦岭东段、中段和西段的植物区系相似性高,与东北的温带、西北的暖温带植物区系的关联性高于华中、华南的植物区系。本研究可以为该区域植物资源和生物多样性保护提供理论依据。

During April and October 2019,filed investigations were conducted on seed plant in Baotianman Nature Reserve,Henan province.The resulted demonstrated that there were 2730 species of 890 genera and 163 families,accounting for 95.9%,83%and 72.3%of the families and genera of seed plant in Henan province,and 98.8%,84.2%and 71.1%of that in Qinling Mountains.The floristics of seed plants was complex in Baotianman Nature Reserve,including 15 distribution types and 18 subtypes,of which 593 species of 245 genera in tropical distribution,accounting for 30.5%of non-world distribution,and 1582 species of 523 genera in temperate distribution,accounting for 65.0%of non world distribution genera.The floristics of Baotianman Nature Reserve was similar to that of the eastern,middle and western parts of Qinling Mountains,and had higher correlation with the floristics of northeast temperate zone and northwest warm temperate zone than that of Central and South China.