环太湖景观生态安全综合评价研究——以苏州市吴中区为例

从景观结构、景观功能和景观受胁迫性3个方面建立了环太湖地区景观生态安全评价体系,共选择25个参评指标,并以环太湖地区的吴中区为例,评价其1984和2002年陆地景观生态安全程度。结果表明,景观生态安全评价综合指数从1984年的63.29%下降到2002年60.44%,但由于景观的社会经济效益大幅度提高对景观安全程度贡献较大,景观生态安全水平基本处于良好状态。2002与1984年相比,景观结构稳定性安全度下降16.95%,景观受胁迫性安全程度降低19.20%,成为景观生态系统不安全隐患,应采取科学合理的措施加以改善,以提高环太湖景观生态系统的安全水平。

Synthetic Evaluation of the Landscape Ecological Security around Taihu Lake

In this paper,an evaluation indicator system of landscape ecological security around Taihu Lake was put forward,including 25 evaluation indicators of landscape structure,landscape function and landscape threatening.Wuzhong district of Suzhou city being taken as an example,with this indicator system,the comprehensive evaluation of landscape ecological security in 1984 and 2002 was conducted.The result showed that the synthetic evaluation indicators of terrestrial landscape ecological security were decreased from 63.29% in 1984 to 60.44% in 2002.However,the landscape ecological security in Wuzhong was in a good state because of the society-economy benefit of landscape increasing greatly.From 1984 to 2002,the safety levels of landscape structure and landscape threatening were decreased rapidly by 16.95% and 19.20%,respectively.So there was a lot of unsafe hidden trouble about landscape structure,landscape threatening and landscape ecological quality.It was believed that the scientific and reasonable measures should be further strengthened,so as to increase the safety level of landscape ecosystem around Taihu Lake.