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《Resources and Enuironment In The Yangtza Basin》 2002-03
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MECHANISM OF ECOLOGICAL DEGRADATION OF MOUNTAIN ECOSYSTEM IN THE UPPER REACHES OF THE MINJIANG RIVER: EFFECTS OF KEYSTONE POPULATIONS

LIU Qing\+1, QIAO Yong kang\+1, WU Ning\+1, PAN Kai wen\+1, BAO Wei kai\+1, WANG Yue zhao\+1, ZENG Zong yong\+2 (1.Chengdu Institute of Biology, The Chinese Academy of Sciences, Chengdu 610041,China;2.Life Science College, Sichuan University, Cheng  
The upper reaches of the Minjiang River are situated in the northwestern Sichuan province, and were typical high valley area. In the past decades, the mountain ecosystem has been degrading because of the disturbance of human activities. In this paper, the general situation of mountain ecosystem was briefly introduced and the effects of keystone populations on the degraded ecosystem were discussed. Furthermore, authors put forward a proposal about the study on the degraded mechanism of the ecosystem in the area. The effects of keystone populations on the degraded ecosystem might be regarded as the core of the studies, such as the dynamics of indicating plant population in semi-arid valley shrubs and the relationship between the population and environmental factors; effects of dynamics of main animals and plants population on subalpine meadow ecosystem; ecological adaptive mechanism of tree seedlings and effect of microbes flora on N-cycling in subalpine coniferous forests etc. The studies will be significant to understand ecological functions of keystone populations.
【Fund】: 国家重点基础研究发展规划项目 (G2 0 0 0 0 4680 2 -0 5 );; 中国科学院知识创新工程重大项目(KSCX1-0 7-0 2 -0 2 );; 中国科学院“九五”重大项目 (KZ95 1-A1-10 4-0 3 -0 2 )资助
【CateGory Index】: X171.4
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