安西自然保护区木本植物区系特征

The floristic characteristics of woody plants in Anxi Nature Reserve,Gansu

探究安西自然保护区木本植物区系特征,能为该区木本植物资源的保护和利用提供科学依据。本研究在相关文献和网络资料查阅和收集以及野外调查基础上,对甘肃省安西自然保护区木本植物种类构成、区系地理特征和特有种分布进行系统分析。结果表明,1)该区共有木本植物21科48属120种;其中,裸子植物两科两属5种,被子植物19科46属115种;乔木3科4属7种,灌木14科19属55种,半灌木9科24属58种。2)植物区系地理成分较复杂,在科级水平有5个分布类型两个变型,属级水平有9个分布类型及4个变型,中国特有种33种。3)木本植物起源较古老,温带和地中海性质明显,与泛热带有一定关系。4)该区木本植物更能体现地中海性质,而草本植物更能体现世界分布和热带分布性质。

The exploration of the floristic geographical characteristics of woody plants in Anxi Nature Reserve will provide some scientific basis for the protection and utilization of woody plants resources in this area.In the present study,the woody plants species composition,floristic geographical characteristics and endemic species distribution in Anxi National Nature Reservation were analyzed combining the related documents,web data and the field investigation.The results showed that the woody plants species in the study area were very rich,where had 120 species of woody plants belongs to 47 genera in 21 families.There were 5species of gymnosperms belonged to 2genera in 2families and 115 species of angiosperms belonged to 45 genera in 19families;7species of arbor belongs to 4genera in 3families,55 species of shrub belonged to 19 genera in 14 families.The floristic geographical composition of this area was complex which had 5distributional types and 2subtypes in the family level,9distributional types and 4subtypes in the genera level,and 33 species of Chinese endemic species of woody plants.Woody plant in Anxi National Nature Reservation had an ancient origin,with some obvious the temperate component and the Mediterranean Sea component,which had a contact with the pantropic component.The woody plants in this area reflected the Mediterranean characteristics more obviously,while the herbaceous plants reflected the cosmopolitan characteristics and temperate characteristics more obvious.