金沙江上游干旱河谷维管植物区系特征  

Floristic Characteristics of Vascular Plants in Dry Valleys of the Upstream of Jinsha River

作　　者：李云琴[1] 杜凡[2] 汪健[2] LI Yun-qin;DU Fan;WANG Jian(Yunnan Academy of Forestry,Kunming Yunnan 650201,P.R.China;Southwest Forestry University,Kunming Yunnan 650224,P.R.China)

机构地区：[1]云南省林业科学院,云南昆明650201 [2]西南林业大学,云南昆明650224

出　　处：《西部林业科学》2019年第1期93-99,138,共8页Journal of West China Forestry Science

基　　金：环境保护部自然生态司(2010年)"全国生物物种联合执法检查和调查"子专题"滇西北野生植物种质资源调查(物种10-二-3-2)"

摘　　要：为了解金沙江上游奔子栏到羊拉河段干旱河谷的植物区系特征,通过野外调查和查阅文献资料,对该河谷维管植物的组成、分布区类型和区系特征等进行分析。结果表明:(1)金沙江上游(奔子栏-羊拉河段)共调查记录维管植物51科95属111种,含单种的科属较多;(2)植物区基本特征是温带成分占优势而有很多热带成分;特有现象明显,研究区中国特有属2属,中国特有种达60种,有4种金沙江干旱河谷特有种;干旱河谷的植物区系与外地植物区系之间联系广泛;植物区系热带向温带过渡。(3)干旱河谷植被有演变成类似我国西北地区的灌木型温带荒漠植被的趋势,其环境比较脆弱。In order to understand the floristic characteristics of the dry valleys in the upstream of Jinsha River,methods of consulting literature material with field investigation and specimen colletion were used,and the results showed that:(1)There were 111 vascular plant species belonging to 95 generas in 51 families,and families and generas with single species were predominate.(2)The floristic composition is dominated by the temperate elements.The endemism was rich,60 species endemic to China,4 species to the upstream of Jinsha River.The flora was widely related to other areas,such as African,Tethys area,and the arid valleys of the other great rivers.The flora was transitional trend of tropical composition to temperate composition.(3)The study indicated that this area had a tendency toward semi-desertification,and the environment was fragile.

关 键 词：金沙江上游 干旱河谷 植物区系特征 维管植物 

分 类 号：S718.5[农业科学—林学]