鄂尔多斯高原西部阿拉巴斯山地区第三纪残遗植物避难所的自然保护问题

阿拉巴斯山地区为干旱区第三纪残遗植物的避难所,是内蒙古地区植物特有现象最明显的地区。共有维管植物251种。地带性植被为草原化荒漠,主要群落类型为四合木荒漠、半日花荒漠、绵刺荒漠、沙冬青荒漠等荒漠群系。以戈壁种和东阿拉善种为主的荒漠成分构成了本地区植物区系的主体。古老残遗种及特有种在植物区系和植被组成中均起主导作用。但是这块宝地目前面临严重破坏,应该尽快成立阿拉巴斯第三纪残遗植物保护区。

NATURAL PROTECTION OF THE REFUGE OF THE SURVIVING PLANT DURING THE TERTIARY PERIOD AT ARABAS REGION IN THE WEST OF ERDUOS PLANTEAU

Arabas region is a refuge of the surviving plant in the arid land during the Tertiary Period and its endemic phenmenon is the most obvious in Inner Mongolia. There are 251 species vascular plants in sum. Its zone vegetation is steppe desert, the main community types are the desert associations such as Tetraena mongolica desert, Helianthemum soongolicum desert, potaninia mongolica desert and Ammopiptanthus mongolic desert. The desert elments which are dominated by gobi species and the species of the eastern Arabas form the main part of the flora at this region. Both the ancient surviving species and the endemic species are dominant in composing the flora and the vegetation. But, this precious place is facing a serious damage,so we should immediately establish a pretective area of the surviving plant during the Ter- tiary period at Arabas region.