论文部分内容阅读
阿拉善干旱荒漠区是我国典型的荒漠生态系统,它不仅是我国北方重要的生态屏障,也是我国六大生物多样性中心之一。在这一区域由于特殊的自然生态背景使之成为灌木种类的“天然王国”。拥有23科57属137种灌木、半灌木。灌木是荒漠植被的主要组分,它在维持荒漠生态系统生物多样性、生态服务功能及其稳定性方面具有重要作用。20世纪下半叶,随着人口快速增长导致的高强度人类活动,已深刻地改变了荒漠生态系统的结构及水分和能量循环过程,导致了灌木植物严重受损退化。为了保育灌木资源,提高人们对灌木在草地恢复中重要作用的认识,文中分析了灌木多样性分布的特点,论述了灌木在干旱荒漠区的特殊作用。结果显示:阿拉善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。
Alashan arid desert area is a typical desert ecosystem in our country. It is not only an important ecological barrier in northern China, but also one of the six major biodiversity centers in China. In this area, due to the special natural ecological background, it becomes the “natural kingdom” of shrub species. There are 137 families, 57 families and 57 shrubs and half shrubs in 23 families. Shrubs are the main component of desert vegetation and play an important role in maintaining the biological diversity of desert ecosystems, ecological service functions and their stability. In the second half of the 20th century, intensive human activities resulting from the rapid population growth have profoundly changed the structure of the desert ecosystem and the process of water and energy cycling, resulting in serious deterioration of shrub plants. In order to conserve shrub resources and raise people’s awareness of the important role of shrubs in grassland restoration, this paper analyzes the characteristics of shrub diversity distribution and discusses the special role of shrubs in arid desert regions. The results showed that the diversity of shrubs in Alashan Plateau is broadly representative and is one of the key areas for the distribution of temperate grassland shrub diversity in China and the conservation of shrub resources in China.