大别山植物区系及南坡和北坡相关性研究

大别山位于皖、鄂、豫三省交界处,约有维管植物1722种,隶属于199科、697属。大别山植物区系具有下列基本特征:1)植物种类丰富;2)植物区系起源古老;3)大别山特有成分较多;4)地理成分复杂;5)区系过渡性明显。本文通过比较分析方法,从大别山不同区域的五个山头(马宗岭、天堂寨、多枝尖、陀尖、湖北大别山)的气侯、植物地理因素,种子植物的数目和结构、优势科、常绿植物和常绿阔叶林、属种相似性系数等方面着重研究了大别山南、北坡的相互关系。作者认为整个大别山植物区系应归属于华东植物区系,其植被应归入北亚热带落叶—常绿阔叶混交林。在划分中、北亚热带分界线时,大别山必须作为一个整体考虑。

A STUDY ON THE FLORA OF THE DABIESHAN AND THE INTERRELATIONSHIP BETWEEN THE SOUTHERN AND THE NORTHERN SLOPE

Dabieshan is situated in the area which bounderes with three provinces(Anhui, Hubei, Henan). It is now known that there are 1722 species of vascular plantswhich belong to 697 genera and 199 families. The basic features of the Dabieshanflora are briefiy summarized as follows: (1) The plant species are very rich; (2)The origin of the Dabieshan flora is very ancient; (3) The endemic components toDabieshan are abundant; (4) The geographical elements are complex; (5) Theflora show more obvious transition. This paper shows the interrelationship between the southern slope and the nor-thern slope of Dabieshan by means of the contrastive analyses of five ridges (Ma-zongling, Tiantangzhai, Duozhijian, Tuojian, Dabieshan in Hubei) from their climateand the phytogeography, the number and composition of seed plants, the dominantfamilres, the evergreen plants and evergreen broaldeayed forest, the coefficents ofsimilarity of genera and species. The author believes that the flora of whole Dabieshan should belong to the floraof East China and the vegetation of whole Dabieshan should be situated in the nor-thern subtropical deciduous-evergreen broadleaved mixed forest. When the demarcationline between the northern subtropics and the central subtropics is drawed, Dabieshanmust be cousidered as an integrated part.