摘要
分析了保护区蕨类植物区系组成和分布类型。现知保护区有蕨类植物20科、37属、95种2变种。优势分布科有蹄盖蕨科、鳞毛蕨科、水龙骨科等,它们是该区蕨类植物的重要组成部分,在区系分布中起着较为重要的作用。卷柏属、耳蕨属、瓦韦属、铁角蕨属、鳞毛蕨属为优势属。本区系单种属多,起源古老,科属结构较简单,科的分布类型以世界分布为主,并与温带区系有着较强的联系;属的分布以温带成分为主,同时也表现出热带、亚热带向温带过渡的特性;种的分布以中国特有分布为主,温带分布次之。这些区系特征与本区古老的地质和优越的的水热条件是密切相关的。
The composition and distribution types of pteridophyte in the reserve is analysized in this section. It is known that the reserve has 95 species,37 genera,20 families and 2 varieties. Athyriaceae, Dryopteridaceae, Polypo- diaceae etc are the dominant family. They are not only the important components of the pteridophyte, but also the suitable habitat type under the conditions of this Reserve, and play the relatively important role in the region of the pteridophyte flora. Selaginella, Polystichum, Lepisorus,Asplenium, Dryopteris are the dominant genera. The majority of these plants are the single species, ancient in origin, and the structure of species and genus is simple. The geo- graphical distribution of the family is mainly composed of cosmopolitan type, and has close relative with the temper- ate zone, the main genus distribution is temperate type, and has transitional characteristics from tropical, subtropical to temperate zones;the main distribution of the species is endemic to China, and tropical zones are the second. The floristic characteristics have close relative with the ancient geological and superior water thermal conditions.
出处
《延安大学学报（自然科学版）》
2013年第2期93-96,共4页
Journal of Yan'an University：Natural Science Edition
基金
陕西省教育厅专项科研基金项目(09JK772)
关键词
周至自然保护区
蕨类植物
区系分析
Zhouzhi nature reserve
pteridophyte
floristic analysis
