广西元宝山植被种子植物区系初步研究

Preliminary study on flora of seed plants of vegeta-tion in Mt.Yuanbaoshan, Guangxi, China

关键词:  植物区系  地理成分  森林植被  元宝山  广西

Key words:  flora  phytogeography  vegetation  Mt.Yuanbaoshan  Guangxi Province

摘要:

组成元宝山植被的种子植物共有118科337属732种,区系统计分析表明:(1)科级和属级的区系成分都表现为热带性质稍强于温带性质,亚热带区系性质明显。在元宝山植被区系中,热带亚热带成分与温带成分相互交融,这正是亚热带山地植物区系的一个基本特征。(2)泛热带分布、热带亚洲分布、北温带分布、东亚和北美洲间断分布和东亚分布的属为该植被区系主要构成成分。(3)元宝山植被中存在许多区系上孑遗、古老、孤立的植物类群,并且特有成分丰富,具有重要的保护价值。(4)裸子植物丰富,针叶林群落类型多样,是元宝山植被组成的突出特点。

Abstract:

Mt.Yuanbaoshan is located in the north of Guangxi(109°7'～109°13' E,25°22'～25°32' N). The flora of seed plants of vegetation in Mt.Yuanbaoshan consists of 118 families,337 genera,732 species. Based on the analysis of the florisctic elements,four main conclusions were showed as follows:(1)On the family level and genus level,the flora shows an obvious subtropical floristic connection. Temperate elements interweave with tropic elements,this is a typical characteristic of subtropical mountain.(2)The main components of this flora of vegetation are Pantropic,Tropical Asia,North Temperate,East Asia & North America disjuncted and East Asia.(3)There are many relict,ancient,endemic plant class group in the vegetation of Mt.Yuanbaoshan,these all have important conservation value.(4)The abundant Gymnosperm and varied coniferous forest types is the prominent characteristic of vegetation in Mt.Yuanbaoshan.