COMMUNITY SUCCESSION TREND IN ECOLOGICAL RESTORATION PROCESS OF Sophora moorcroftiana SHRUB IN SEMI-ARID VALLEY OF PLATEAU

摘要

This study was carried out to reveal the temporal and spatial sequence in community succession during the ecological restoration process of Sophora moorcroftiana shrub on the plateau. In this paper, the zonal vegetation Sophora moorcroftiana shrub in the semi-arid valley of Lhasa was selected as the research object, and the research method of spatial sequence was adopted in replace of time sequence to measure and analyse typical community characteristics, structure and composition of Sophora moorcroftiana shrub as well as the species niche and interspecific relationship in the community. The results showed that: (1) Sophora moorcroftiana community restoration process was roughly divided into 4 ecological species groups, and the basic ecological restoration time was about 15a; (2) Sophora moorcroftiana shrub's community succession sequence was roughly: from Tribulus terrestris, Cynoglossum amabile, Heteropappus gouldii to Artemisia we1lebyi, Artemisia desterorum, Chenopodium botrys, then to Ceratostigma minus, Oxytropis Ochrocephala, Stipa capillacea communities, and finally to Sophora moorcroftiana, Ephedra gerardiana, Pennisetum flaccidum communities; (3) Enclosure promotes forward succession of Sophora moorcroftiana, which was the most effective way to restore valley vegetation. Potential analysis of the ecological restoration process of the Sophora moorcroftiana shrub provides scientific basis and theoretical support for the restoration and reconstruction of the plateau degraded ecosystem.