甘肃省荒漠种子植物区系  

Floristic analysis of desert spermatophytes in Gansu Province

作　　者：刘有军[1] 王继和[1] 马全林[1] 张德奎[1] 

机构地区：[1]甘肃省治沙研究所甘肃省荒漠化防治重点实验室,甘肃武威733000

出　　处：《生态学杂志》2007年第10期1521-1527,共7页Chinese Journal of Ecology

基　　金：甘肃省自然科技资源共享平台建设支撑资助项目

摘　　要：对甘肃省荒漠区种子植物进行了调查和区系分析。结果表明:该区有种子植物543种,隶属于228属,55科;为典型的温带荒漠植被,起源古老,与阿拉善地区植物区系关系密切;植物种类贫乏,区系优势现象十分明显;优势科10个,分别为藜科、豆科、禾本科、菊科、十字花科、蓼科、石竹科、毛莨科、蒺藜科和柽柳科;表征科6个,分别为麻黄科、柽柳科、胡颓子科、蒺藜科、藜科和蓼科;该区地理成分多样,有9个分布类型,其中,温带分布型占绝对优势,占总属数的33.76%;地中海、西亚至中亚分布及变型在区系组成中也占有重要地位,占总属的28.95%;中国特有成分较低,仅占全国特有属的1.56%。The investigation and floristic analysis on the desert spermatophytes in Gansu Province showed that there were 543 species of desert spermatophytes, belonging to 228 genera of 55 families. The flora had the typical characteristics of temperate desert vegetation, ancient origin, and the very similarity to the flora in Alashan area. Although the species were poorer in number, the dominant family phenomenon was quite obvious. There were l0 dominant families, i. e. , Chenopodiaceae, Leguminosae, Gramineae, Compositae, Cruciferae, Polygonum, Caryophyllaceae, Ranunculaceae, Zygophyllaceae and Tamaricaceae; and 6 typical families, i. e. , Ephedraceae, Tamaricaceae, Elaeagnaceae, Zygophyllaceae, Chenopodiaceae and Polygonum. According to the geographic elements of genera, there were 9 areal types, among which, temperate element was superior in species number, accounting for 33.76% of the total genera. Mediterranean and West and Central Asian elements as well as their variants also took important position, accounting for 28.95% of the total. The China endemic element was rather than lesser, only accounting for 1.56% of the total endemic genera.

关 键 词：甘肃省 荒漠种子植物 区系分析 优势种 地理分布 

分 类 号：Q948[生物学—植物学]