甘肃省荒漠种子植物属的区系分析.pdf.pdf

文档介绍：:1673—923X(2007)06—0015—06甘肃省荒漠种子植物属的区系分析刘有军,王继和,马全林,张德奎,俄有浩,张晓琴(甘肃省荒漠化防治重点实验室甘肃省治沙研究所,甘肃武威733000)摘要:对甘肃省荒漠区种子植物属的组成及其区系特征进行l『:甘肃省荒漠区分布有种子植物228属,其区系特征为单种属和寡种属多,优势现象明显,植物区系具有温带荒漠性和古老性;区系地理成分复杂多样,包含9个分布区类型和l3个变型,温带成分(包括北温带分布及其变型、旧大陆温带分布及其变型和温带亚洲分布)占有绝对优势,;地中海区一西亚一中噩分布也是主要的组成部分,,特有成分比较低,中国特有成分仅4属,,起源古老,:植物学;荒漠区;种子植物;属;区系组成与特征;区系分析;甘肃省中图分类号:K903文献标志码:AFloristieAnalysisofSpermatophyteGeneraintheDesertificati0nAreainGansuProvinceIIUYou—jun,WANGJi—he,MAQuan—lin,ZHANGDe—kui,EYou—hao,ZHANGXiao~qing(bating,GansuDesertControlResearchInstitute,Wuwei733000,Gansu,China)Abstract:positionandfeatureofspermatophytegenerainthedesertificationareainGansuProvinceandexploretheirorigin,,relevantdatashowthattheseedplantsdistributedinthedesertificationareaareof228genera,whoseflorafeatureisdominatedbyone—seededanddepauperatedgenera,withmarkedphenomenonofsuperiority;plexanddiversified,covering9distributionzonesand13variabletypes;,;thatthedistributionsoftheMediterranean—West—Asia—Central—ponentflorainthisarea,;upyalowerpercentage,withChineseendemicgenerabeingonly4,:botany;desertificationarea;spermatophyte;ge