东阿拉善---西鄂尔多斯地区狭域特有植物濒危程度的研究

The more study than expected was completed on time .The better results revealed the distributing rule of the special different population in the eastern Alasha-Western ERDOS specified plant community. The area of part population show normal school. The minimum area is the minimum surviving area. The size of population is the minimum size of the minimum surviving population. The dangering extent of these populations were determined. The results showed the New special species had the hightest dangering extent, But the distribute area of special species was enlarged under the over-graining. In the same time, it was proved that the over mankind activities were the important reason to narrow the species' distributing area, But the disturb caused the part plant species got the dominants status in the population competition..The endangering extent of thirteen special plants. were determined. The most endangering plant population including several terns species. The distribution map. Community distributing map and the potential distributing map of these plants were completed.

东阿拉善----西鄂尔多斯地区跨越荒漠化草原、草原化荒漠和荒漠几个植被地带，气候从干旱过渡到极端干旱，环境条件相对严酷。对在该区生存受至威胁的主要特有植物在当代自然、人类活动影响下的濒危程度进行研究，确定这些植物的濒危等级、物种濒危的导因、规律及有关的生物学特性，有较高的学术研究价值，并能为科研与保护部门的决策提供理论依据。