新疆现代绿洲稳定性的尺度条件简析

Analysis on the Conditions of Stability of the Modern Oases in Xinjiang

运用生态经济学理论,研究绿洲稳定性概念指出:绿洲稳定性表现在一定尺度条件下,不同尺度的主要驱动机制不同,稳定性概念也不同;绿洲稳定性的驱动力具有综合性,在大时空尺度下自然驱动力是基础和背景,小时空尺度下人文驱动力是主导;现代绿洲稳定性概念应在绿洲生态经济系统中考察、定义。

Because of the vulnerability of the oasis ecosystems, both the positive and negative ecological effects of human activities on the stability of the modern oases are significant in arid areas. For the modern oases, human activities, such as building the shelter-forests and irrigation canals, are dominant in constructing and optimizing the artificial ecosystems and their functions, so human activities play an important role in the positive evolution of the modern oases; contrairly, the irrational human activities are the main driving forces in the negative evolution of the oases. In this paper, the stability of the modern oases in Xinjiang is researched based on the ecological-economic theory. The conclusions are as follows: (1) Human activities, the main driving forces in oa sis evolution, are the endogenous variables; (2) The stability of the oasis ecosystems should include many dimensional and hierarchical scales, such as the oasis ecosystems, oasis multiplexed ecosystems and arid land MODS (mountain-oasis-desert systems) ; (3) The mechanisms of oasis stability are different under the different scales; (4) The ecological-economic systems are the scales of modern oasis stability conception.