Chin J Plan Ecolo ›› 2002, Vol. 26 ›› Issue (增刊): 82-87.

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THE INFORMATION OF ENVIRONMENTAL EVOLVEMENT OF THE NORTHERN PIEDMONTS OF THE TIANSHAN MTS. IN THE HISTORY

YAN Shun   

  1. Xinjiang Institute of Ecology and Cerography, the Chinese Academy of Sciences, Ürümqi 830011, China
  • Online:2015-03-09 Published:2002-09-01

Abstract:

 

Abstract During the last 2000 years, the climate of the northern piedmont of Tianshan Mountain has varied between cold and warm, arid and humidity, but the whole arid condition has not changed. It has varied with the change of climate, as for plants, the limit of forests, the growth degree of plain valley forest and the area of the lower plain meadow. The mountain ecosystem is more stable contrary to the plain ecosystem. Rivers and lakes of the plains is not very stable and easily changed as a result of the change of the regional climate and the biology of the community. The water system in the plain has largely changed because of the variation of the climate and the human activity. It is a common phenomenon that the water quality is reducing, the flow is shortening and the ending lakes are disappearing.

      Because the artificial oasis took the place of the natural oasis, the function of natural oasis is weakening and nearly lost the ability of improving the environment, the habitat of wildlife and preserving the biological diversity in wild area. Since the Neolithic Age, the human being has emerged and evolved in this area, living mainly on hunting and herding, followed by herding and farming, and finally farming and herding. Therefore the human influence on the environment last a considerable long period of time. Since Qing Dynasty, especially after the foundation of new China (1949), the effect has increased sharply and been the dominant factor of the variation of environment in the latter-day, which presented on controlling of water resource, and so caused the change of water system, vegetation and desert etc.

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