广西植物Issue(2)：273-281,9.DOI:10.11931/guihaia.gxzw201312051
云南蕨类植物的物种多样性和区系组成
Species diversity and floristic composition of the fern flora of Yunnan,China
摘要
Abstract
Based on the field investigation and plant classification,the floristic analysis of fern in Yunnan Province was studied.We made Flora of Yunnan (Vol.20 and Vol.21)complete,which was the principal research material,by using the list of local ferns in Mt.allaoshan Nature Reserve,Xishuangbanna,Yuengling Nature Reserve,Dulong River and so on supplementing the list of pteridophyte in Yunnan,through routine method of statistical analysis meth-od and the analysis of the floristic geography study of ferns in Yunnan,in order to find out the number of species in Yunnan ferns,the floristic composition characteristics and contact area of the surrounding area.The results were as follows:The fern flora of Yunnan consisted of 60 families,193 genera and 1 530 species (including varieties and forms),and the family,genera and species accounting for the total number of ferns in Chinese were 58.8%,83.9%and 95.2% respectively;The number of families contalning more than 30 species was 13 and the number of families contalning more than 5 genera was 11 in this 60 families,these genera and species accounting for the total number of ferns in Yunnan Province was 56.5% and 79.2%,especially the Dryopteridaceae,Athyriaceae,Polypodiaceae,the-lypteridaceae,there were 761 species of ferns belonging to 70 genera in 4 families,accounted for 36.3% and 49.7%respectively,the number of genera contalning more than 30 species was 11,accounted for 5.7% and 41.7% respective-ly,and the dominant genera were Dryopteris,Polystichum,Athyrium,Asplenium,Selaginella,the five genera had 403 species which accounted for 26.3% of the total species in this area;the peteridophyte florae did not contaln the fami-lies endemic in Yunnan Province,but had four endemic families in Asia:Peranemaceae,Monachosoraceae,Davalliace-ae,Gymnogrammitidaceae;The floristic analyses showed that the maln elements were tropical and subtropical in na-ture,the families in tropical and subtropical distributions accounted for 66.6% in the family areal type and the tropi-cal distribution type had 112 genera,which accounted for 68.7% of the total genera (excluding the Cosmopolitan);The fern flora of Yunnan was an important part of East Asia,there were 31 genera distributed in East Asia and 6 genera in China alone,respectively accounted for 19.0% and 3.7% of the total genera in addition to the cosmopolitan;The fern floras of Yunnan,Tibet and Talwan ,China shared common floristic elements,and origin,as well as the background of species differentiation,the similarity coefficient of genera was about 70% and the similarity coefficient of species was about 30%,their common originated in tropical and subtropical areas;At the genus level,tropical flo-ristic composition accounted for 68.7%,temperate floristic elements 27.6%,there was a certaln degree of floristic transition;The intensity of floristic differentiation at family level was 3.2 and at genus level was 7.9.The flora differ-entiations both at family and genus levels are strong.关键词
蕨类植物/物种多样性/区系组成/区系分化/云南Key words
ferns/species diversity/floristic composition/floristic differentiation/Yunnan分类
农业科技引用本文复制引用
李学梅,陆树刚,徐成东..云南蕨类植物的物种多样性和区系组成[J].广西植物,2015,(2):273-281,9.基金项目
国家自然科学基金(30760040) （30760040）
