基于RS和GIS的北京市景观生态安全评价

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0.410和0.403，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.

Landscape ecological security assessment of Beijing City based on RS and GIS

By using RS, GIS, and landscape ecology methods, and based on the landscape structure, 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 was on 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 being 0.410 and 0.403, respectively, suggesting a slight deterioration in the landscape ecological security during the study period.