港湾快速城市化地区景观生态安全评价——以厦门市为例

Landscape ecological security assessment in rapidly urbanizing bay-area: a case study of Xiamen City,China

以压力-状态-响应(PSR)为概念框架构建厦门景观生态安全评价指标体系,以TM遥感影像为基础数据元,对可空间插值指标进行格网采样空间插值,对不可空间插值指标进行专家赋值,采用RS和G IS相结合的技术,通过空间叠加得到厦门市2003年和2006年的景观生态安全综合指数,以揭示厦门市区域景观生态安全的空间分布规律。研究结果表明:(1)2003年厦门景观生态安全度平均值为0.586,处于中等安全水平,2006年平均值为0.650,处于中高安全水平,区域景观生态安全度整体水平在小幅度提高;(2)各行政分区2006年较2003年数值均有所提高,2003年其安全度自高向低排序依次是同安>翔安>思明>海沧=集美>厦门海域>湖里,2006年其安全度自高向低排序依次是同安>思明>海沧=翔安>集美>湖里>厦门海域;(3)景观变化压力指数2006年较2003年有所提升,但是景观生态安全调控力度也在加大,缓解了城市化过程对区域景观生态安全的压力和影响。

Based on the Pressure-State-Response （PSR） model framework, an indicator system was developed to assess landscape ecological security. The indicators were divided into two groups. One group included indicators of the spatial interpolation index. The other included indicators of non-spatial interpolation index which value was suggested by experts in the field. In order to explore the spatial distribution of landscape ecological security, the landscape ecological security individual index and comprehensive index for Ximen City between 2003 and 2006 were analyzed through spatial overlay with the TM remote sensing images and GIS technique. The results indicated that： （ 1 ） the mean value of the landscape ecological security in 2003 was 0. 586 which is within the fair level while in 2006 was 0. 650 which is within a better level ; （2） the landscape ecological security levels within each districts of Ximen City in 2006 were better than the levels in 2003.Among the districts of Xiamen City the landscape ecological security levels ranked in decreasing order in 2003 as Tong＇an 〉 Xiang＇an 〉 Siming 〉 Haicang 〉 Jimei 〉 sea area 〉 Huli, whereas the orders in 2006 wasTong＇an 〉 Siming 〉 Haicang and Xiang＇an 〉 Jimei 〉 Hul 〉 sea area; and （3） the landscape change pressure index in 2006 was higher than the index in 2003. However, between 2003 and 2006, the landscape ecological security control was strengthened and resulted in a rapid urbanization of the ecological system.