中国珍稀濒危荒漠植物区系地理相似性的定位研究

Quantitative Studies on Floristic Similarity of Rare and Endangered Desert Plants in China

本文以中国西北部 ( 1 )准噶尔盆地、( 2 )塔里木盆地、( 3 )东疆哈 -吐盆地、( 4)柴达木盆地、( 5)河西地区、( 6)阿拉善高原、( 7)阿拉善东部地区作为珍稀濒危荒漠植物区系定量分析单位。应用 Jaccard、Ciechanowski( Sprensen)和 Ochari相似系数 ,根据 50种珍稀濒危荒漠植物的地理区系分布进行统计分析 ,建立 7个植物区系间的相似矩阵 ,进行聚类分析。结果表明 :中国西北地区珍稀濒危荒漠植物区系之间的相似关系 ,以准噶尔和东疆吐 -哈盆地间相似关系最为紧密 。

This paper gives the quantitative comparison and analysis on the floras of Chinese rare and endangered desert plant.These floras included (1)Zhungeer Basin,(2)Tarim basin,(3)Tu-Ha basin in the east of Xinjiang,(4)Tsaidam basin,(5)Hexi area,(6)Alashan plateau and (7)the east area of Alashan.The similarity relationship and cluster analysis of seven floras were studied by using three association coefficients (jaccard coefficient,Czekanowski coefficient and Ochiai coefficient) based on the similarity coefficients of rare and endangered desert species.The results indicated that the Zhungeer Basin and the Tu-Ha basin in the east of Xinjiang was Closer,and they maintained closely links with the floras of Tsaidam basin,Hexi area,Alashan plateau and Tarim Basin.The east area of Alashan was obviously isolated.