【摘要】 东北农牧交错带是典型的生态脆弱区,以吉林省通榆县为研究区域,基于RS和GIS技术,采用最小累积阻力模型构建通榆县1986年、2000年和2008年景观生态安全格局,基于2008年的景观安全格局进行风险预警分析。结果表明:1)由于景观格局的变化,研究区安全核心区的面积略有扩大,安全缓冲区面积在减少,安全外围区面积在增加;2)研究区的景观格局阻力值呈两极分化趋势,生态高风险重点预警区域主要集中在通榆县中东部,应优先考虑开展生态恢复治理。更多还原

【Abstract】 Landscape is the basic unit of the regional ecological environment management.Landscape security is an important part of ecological security.Ecological restoration has been shown to be feasible on the landscape level.Northeast farming-pastoral zone is a typical ecologically fragile area.This paper takes Tongyu County in Jilin Province as the study area and is based on the technology of RS and GIS,and builds ecological security landscape patterns of the study area in 1986,2000and 2008with the minimum cumulative resistance model.At last,an analysis of risk early warning is performed based on the landscape security pattern of 2008.The results show that:1)Due to changes in landscape pattern,the core security area of the study area has been slightly expanded,the security buffer area reduced and the security perimeter area increased;2)The resistance value of the landscape pattern of the study area showed the polarization trend.Key ecological high-risk warning area was mainly in east-central Tongyu County where should be prior given to ecological restoration and treatment.更多还原