基于RS 和GIS 的北京市景观生态安全评价 - 应用生态学报.PDF

应 用 生 态 学 报摇 2010年11月摇 第21卷摇 第11期摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 ChineseJournal of Applied Ecology,Nov. 2010,21(11):2889-2895 基于RS和GIS 的北京市景观生态安全评价* 宋豫秦摇 曹明兰** (北京大学环境科学与工程学院,北京 100871) 摘摇 要摇 结合RS、GIS和景观生态学方法,基于景观结构、功能、活力、生态敏感性和景观压力 构建了景观生态安全评价指标体系,并分析1988 和2004 年北京市景观生态安全程度及其时 空分布规律.结果表明:1988—2004 年,北京市生态服务价值处于较高水平,景观活力和景观 压力处于较低水平,景观结构稳定性下降,生态敏感度则处于较低水平;1988 和2004 年北京 市景观生态安全度均处于中级水平,其景观生态安全指数平均值分别为0郾410 和0郾403,表明 研究期间北京市景观生态安全整体水平呈稳中稍降的趋势. 关键词摇 生态安全摇 景观尺度摇 指标体系 文章编号摇 1001-9332(2010)11-2889-07摇 中图分类号摇 Q143摇 文献标识码摇 A Landscape ecological security assessment of Beijing City based on RS and GIS. SONG Yu鄄 qin, CAO Ming鄄lan (College of Environmental Sciences and Engineering, Peking University, Beijing 100871,China).鄄Chin.J.Appl.Ecol. ,2010,21(11):2889-2895. Abstract:By using RS,GIS,and landscape ecology methods,and based on the landscape struc鄄 ture,function,vitality,ecological sensitivity,and landscape pressure,an evaluation index system of landscape ecological security was constructed to analyze the landscape ecological security level and its spatiotemporal distribution pattern in Beijing City in 1988-2004. During the study period, the ecological service value of Beijing City wason a relatively high level,while the landscape vigor index and landscape pressure were on a relatively low level. The stability of landscape structure dropped,and the ecological sensitivity was also on a relatively low level. In 1998 and 2004,the landscape ecological security index of Beijing City was on a medium level,with the average value being0郾410 and0郾403,respectively,suggesting a slight deterioration in the landscape ecological security during the study period.