Abstract:

In order to grasp the community structure and diversity characteristic of the natural plant communities in oasis-desert transition area, to provide a theoretical basis for desert vegetation recovery and biodiversity conservation. The author researched Nitraria tangutorum, Oxytropis aciphylla and Artemisia desertorum of natural community’s structural characteristics and diversity in oasis desert ecotone in the southeast margin of the Tengger desert on the basic of the field investigation. The results showed: the structure of natural community was simple. It was composed of 47 plant species (26 genera, 10 families). The shrub species was relatively homogeneous and small number, and the herbaceous species was relatively abundant and larger number. The plants were relatively low bud nodes to adapt to the habitat conditions. The richness index of natural community was higher, diversity index was lower, evenness index between the communities without big difference. The results could be the gist for the environment construction and the plant protection.