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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 | |
| 引用本文： | 任平,洪步庭,程武学,周介铭. 长江上游森林生态系统稳定性评价与空间分异特征[J]. 地理研究, 2013, 32(6): 1017-1024. DOI: 10.11821/yj2013060005 |
| 作者姓名： | 任平 洪步庭 程武学 周介铭 |
| 作者单位： | 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 |
| 基金项目： | 国家973项目，全球环境基金(GEF)子项目，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 |
| 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 |
| 收稿时间： | 2012-10-15 |
| 修稿时间： | 2013-03-08 |
Stability evaluation of forest ecosystem and study of spatial differential features in the upper Yangtze River |
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| REN Ping,HONG Buting,CHENG Wuxue,ZHOU Jieming. Stability evaluation of forest ecosystem and study of spatial differential features in the upper Yangtze River[J]. Geographical Research, 2013, 32(6): 1017-1024. DOI: 10.11821/yj2013060005 | |
| Authors: | REN Ping HONG Buting CHENG Wuxue ZHOU Jieming |
| Affiliation: | 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 |
| 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. |
| Keywords: | upper Yangtze River forest ecosystem stability evaluation spatial differential features |
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