A DISCUSSION ON BIOGEOGRAPHICAL LINES OF THE TROPICAL—SUBTROPICAL YUNNAN

编号 zgly0000282115

文献类型 期刊论文

文献题名 A DISCUSSION ON BIOGEOGRAPHICAL LINES OF THE TROPICAL—SUBTROPICAL YUNNAN

作者 ZHUHua  YANLi-chun 

作者单位 KunmingDivisionofXishuangbannaTropicalBotanicalGarden  theChineseAcademyofSciences  Kunming650223  P.R.C 

母体文献 Chinese Geographical Science;中国地理科学: 英文版 

年卷期 2002,12(1)

页码 90-96

年份 2002 

分类号 Q151 

关键词 生物地理  植物亲合力  云南  热带地区  亚热带地区 

文摘内容 Based on comparative studies on four regional floras from northwest,west south and southeast of Yunnan respectively,the formerly suggested two biogeographical lines,i.e.the “Tanaka Line”and the “Ecogeographical Diago-nal Line”,both going from northwest to southeast of Yunnan,and their significance are discussed.In family and generic levels,similarity coefficients among the four compared floras are more than 93% and 60% separately,which indicate the close floristic affinities among them.The highest similarity coefficient,i.e.98.7% in family level and 78.6% in gener-ic level separately,is found between the regional flora of northwest Yunnan and the flora of southeast Yunnan although these two regions are the most distant away each other among the compared regional floras.The flora of northwest Yun-nan is also the most similar to the flora of southeast Yunnan in floristic composition.These support the idea of “Ecogeographical Diagonal Line“.In specific level,the relatively high similarity coefficient is between the regional flora of west Yunnan and the one of south Yunnan.The floristic affinities among these regional floras and some distribution patterns could be explained by the geological history and tectonic theory of Yunnan。