【摘要】 鄂尔多斯高原是我国北方一个相对独立的自然单元 ,从大气环流、地质地貌、土壤、水文、植被及人文和社会背景等方面讲 ,它是一个多层次的 ,十分复杂的生态过渡带。特殊的自然生态背景使之成为灌木种类分布的“天然王国”。该地区的西北部植物区系在古地中海的海浸区 ,且未直接受到第四纪大陆冰期的袭击 ,加之其过渡带的特殊生态意义及其基质条件的多样性 ,使该地区丰富的灌木多样性得以维持的主要原因。本文分析了灌木多样性分布与起源的特点 ,指出 ,鄂尔多斯高原丰富的灌木多样性具有广泛的代表性 ,是我国温带草原灌木多样性分布的中心和我国灌木资源多样性保育的关键地区之一。更多还原

【Abstract】 Ordos Plateau is a relative independent natural unit in North China but also a muli dimensional ecotone in view of general atmospheric circulation, geology, geomorphology, pedology, hydrology, vegetation and social/human economics. There exists the “Natural Kingdom”of shrub distribution formed on the special natural ecological background and had never directly experienced Quaternary continental glaciation. Besides, the factors added by the speciality of ecotone and the diversity of groundmass in the area are the principal reasons for supporting shrubby diversity in the area. Having analyzed the characteristics of distribution and origin of the shrubby diversity, it concludes that the shrubby diversity in Ordos Plateau has significant representativeness and is the center of the shrub distribution in the steppe of China’s temperate zone.更多还原