地理研究

地理研究 ›› 2013, Vol. 32 ›› Issue (6): 1017-1024.doi: 10.11821/yj2013060005

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长江上游森林生态系统稳定性评价与空间分异特征

任平1,2, 洪步庭1,2, 程武学1,2, 周介铭1,2   

  1. 1. 四川师范大学西南土地资源评价与监测教育部重点实验室, 成都610066;
    2. 四川师范大学地理与资源科学学院, 成都610066
  • 收稿日期:2012-10-15 修回日期:2013-03-08 出版日期:2013-06-10 发布日期:2013-06-10
  • 作者简介:任平(1978- ),男,湖北荆门人,博士,副教授,主要从事资源环境评价、土地资源管理等研究。E-mail:pren121680@126.com
  • 基金资助:

    国家973项目(2009CB421105);全球环境基金(GEF)子项目(C/IV/S/06/060);四川省环境保护厅2012专项资金项目;四川省科技厅科技支撑项目

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

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12 | 5

摘要： 长江上游森林生态系统是长江流域的重要生态屏障。以长江上游为研究区域,采用RS、GIS技术,通过建立“干扰—响应”(D-R)生态系统稳定性评价框架和指标体系,开展大尺度森林生态系统稳定性评价研究,并深入分析其空间分布特征。结果表明:①长江上游森林生态系统稳定性整体处于中等偏差的状态,稳定性一般、较差及极差区占整个森林生态系统面积的50.09%;其中,稳定性极差区占6.63%,较差区占19.29%,一般区占24.17%,良好区占26.29%,较好区占23.62%。②长江上游森林生态系统稳定性表现为西北强东南弱的空间分布特征,稳定性与海拔呈近似正相关关系,稳定性较差的区域主要分布在10°-25°坡度区间,25°以上坡度区域稳定性较好。本研究可为长江上游森林生态系统的保护与恢复提供科学依据,进而为长江上游生态环境保护和生态屏障建设提供决策参考。

关键词: 长江上游, 森林生态系统, 稳定性评价, 空间分异特征

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