The significance of biodiversity in protection,restoration and reconstruction of Karst ecosystem

In order to provide the understanding of the aforesaid question, the essay chooses two cases,which are so different and have no impaction with each other,which are subtropical type of Karst of southwest in China and temperate type of Karst of Poland.They have the significant differences of geology, climate, soil and hydrology. The preliminary research indicates that although there are differences in Karst environment in these two area, the same character of the deteriorated ecosystem is species poor. In order to solve the problem of Karst environment, restoration of vegetation is the important and the biodiversity is key point of restoration the vegetation. The results show that the basis of restoration of biodiversity is choosing the suitable pioneer and key species. About southwest China, the pioneer species characters are calciphile, petrophile and xerophile; the key species characters are: (1)enduring arid soil and the change of difference in temperature between day and night; (2) roots much developed and stems have sprout ability; (3) adapting to calcisoil. On this basis reconstruction of pioneer community and reach the goal of restoration and reconstruction the Karst ecosystem.