苏南地区土地生态质量空间分异及其与经济发展协调性评价

Evaluation on the Spatial Differentiation of Land Ecological Quality and Its Coordination with Economic Development in South Jiangsu

通过构建"基础—结构—胁迫—效益"四个层面评价指标体系,对苏南地区土地生态质量进行系统评价,运用空间自相关方法,对其空间分异特征进行分析。结果显示:(1)研究区土地生态质量全局Moran系数为0.79,显著性水平为0.01,存在显著的正空间自相关,呈现出聚类分布的特征;土地生态质量低值区集中于主城区,高值区集中于边远农村地区,城乡梯度规律明显。(2)通过Q型层次聚类分析法,对苏南地区土地生态质量与经济发展协调性进行分类,结果显示:土地生态质量与经济协调发展类、经济滞后主导的失调发展类、土地生态质量退化主导的失调发展类市县各占总数的33.33%,呈现出数量比例均匀分布的特征。

Taking the south Jiangsu as an example, this paper firstly proposed a four-dimension indicator system, which was mainly based on the ‘basic-structure-threat-profit’ framework, and then comprehensively evaluated the land ecological quality. Further, the spatial pattern of regional land ecological quality was explored by using the spatial cluster analysis. Results showed that： （1） the global Moranrs I amounted to 0.79, and its significance level was 0.01, there was an obvious positive spatial autocorrelation, the low land ecological quality areas concentrated in the main city zone, while the high-value districts were in outlying rural zone, the low-value and high-value coexis ted in the suburban areas, showing the evident gradient from urban to rural areas; （2） the results from Q-type hierarchical cluster analysis indicated that 33. 33% of cities and counties under research could be classified into the group of harmonious development, 33.33% belonged to the group of imbalance develop- ment resulting from economic lag, while the rest 33.33% belonged to the group of imbalance development resulting from the degradation of land ecological quality, showing the even distributed proportion.