GEOGRAPHICAL RESEARCH ›› 2013, Vol. 32 ›› Issue (6): 1017-1024.doi: 10.11821/yj2013060005

• Article • Previous Articles     Next Articles

Stability evaluation of forest ecosystem and study of spatial differential features in the upper Yangtze River

REN Ping1,2, HONG Buting1,2, CHENG Wuxue1,2, ZHOU Jieming1,2   

  1. 1. Key Lab of Land Resources Evaluation and Monitoring in Southwest China, Ministry of Education, Sichuan Normal University, Chengdu 610066, China;
    2. Institute of Geography and Resources Science, Sichuan Normal University, Chengdu 610066, China
  • Received:2012-10-15 Revised:2013-03-08 Online:2013-06-10 Published:2013-06-10

Abstract: The forest ecosystem in the upper Yangtze River basin is a significant ecological shelter belt.Taking the upper Yangtze River as a study area,this paper adopted RS and GIS techniques to evaluate the stability of forest ecosystem in a large scale and made a deep analysis of its spatial distribution characteristics by establishing"disturbance-response"(D-R) framework and index system of stability evaluation of forest ecosystem.The results showed that:(1)The stability of forest ecosystem of study area was overall below the average.The mild stable,unstable and very unstable regions accounted for 50.09% of the whole area,of which 6.63% was very unstable,19.29% was unstable,24.17% was mild stable,26.29%was moderate stable,and 23.62% was stable.(2)Its spatial distribution pattern showed that the forest ecosystem stability was better in northwest region while worse in southeast,and there was a positive correlation between the stability and the altitude.Areas of poor stability were mainly distributed on the slopes of 10°-25°,and areas distributed on the slope over 25°were in better stability.The research could provide not only a scientific basis for the conservation and restoration of forest ecosystem in the upper Yangtze River,but also important policy-making reference for eco-environment protection and ecological barrier construction in the study area.

Key words: upper Yangtze River, forest ecosystem, stability evaluation, spatial differential features