LI Chuang,LIU Ji-ping.Land Use/Cover Change and Responses of Eco-security in the Middle-Lower Reaches of Huolin River Watershed[J].Research of Soil and Water Conservation,2012,19(01):174-178.
霍林河流域中下游土地利用变化及生态安全响应
- Title:
- Land Use/Cover Change and Responses of Eco-security in the Middle-Lower Reaches of Huolin River Watershed
- Keywords:
- land use change; ecological security; landscape pattern index; temporal and spatial variety; Huolin River watershed
- 分类号:
- F301.24
- 摘要:
- 以GIS和RS技术为平台，选取1970年和2005年霍林河流域中下游的土地利用数据，从景观生态学角度提出了景观生态指数来反映LUCC变化所带来的生态效应。在此基础上，构建生态安全评价指数（ESI）研究霍林河流域景观生态安全的时空变化特征。研究表明：35 a间土地利用变化显著，导致景观生态安全指数的时空分异性较强，生态安全程度总体呈下降趋势，由于研究区特殊的生态环境，使该区域生态安全指数分布形态及其下降幅度存在较大的差异，较高的生态安全指数（ESI>0.7）主要分布于该区域的西北部，整体呈现由西北向东南下降的趋势。该文应用景观方法研究生态安全，揭示不同景观类型间的迁移转化特征，并进一步识别区域生态环境的变化趋势及其内在因素，对区域生态建设和资源开发具有指导意义。
- Abstract:
- Based on the data of land use of the middle-lower reaches of Huolin River watershed in 1970 and 2005, supported by GIS and RS, and with the indices of fragmentation, isolation and dominance, and of vulnerability of landscape types, the temporal and spatial characteristic of landscape ecological security in Huolin River watershed was analyzed. The results showed that there were different change trends for different landscape types in this region, the transformation from one landscape type to another was very complex and that was mainly happened among farmland, woodland and grassland. It was found that the change of landscape structure could strongly influence the temporal and spatial distribution of ecological security index (ESI) under natural and human factors, which might result in the decrease of the degree of ecological security (ESI) during 35 years. The higher ESI (ESI>0.7) was mainly distributed at the northwest, and the lower one at the southeast. Therefore, the alteration character among different landscape types were discovered by using the method of landscape to study on the ESI and then the change tendency was identified and its inner factors of the regional eco-environment might be important for regional eco-construction and natural resource exploitation.
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备注/Memo
收稿日期:2011-8-2;改回日期:2011-9-9。
基金项目:国家自然科学基金项目（41071037）；吉林省科技支撑计划项目（20080207）；吉林师范大学研究生创新科研计划项目（201111）
作者简介:李闯（1978- ），女，吉林省四平人，硕士，实验师，主要从事资源与环境信息系统研究。E-mail：lich1978@126.com
通讯作者:刘吉平（1972- ），男，山东定陶人，博士，副教授，主要从事资源与环境信息系统研究。E-mail：liujpjl@163.com