基于PSR模型的大都市外围乡村生态安全空间格局优化——以武汉市为例

Optimization of Spatial Pattern of Rural Ecological Security in Metropolis Based on PSR Model: A Case Study of Wuhan

大都市的快速发展对外围乡村生态安全格局造成了较大影响。以武汉市农业生态区为研究对象,基于PSR模型构建生态安全评价指标体系,计算生态安全指数并分析生态安全空间特征。武汉市农业生态区生态安全指数的圈层特征明显且轴向差异较大,三生空间的生态安全状况同时存在轴向和圈层差异;山体、水体生态安全状况由近到远梯次递增。按照从局部到整体、从单一到复合的调控思路,提出分类、分级、分层的差异化优化调控策略。

The rapid development of metropolises has greatly affected the ecological security pattern of peripheral villages.Taking the agricultural ecological area of Wuhan as a research object,an ecological security evaluation index system was constructed based on the PSR model,the ecological security index was calculated,and the ecological security spatial characteristics were analyzed.The ecological security index of Wuhan’s agricultural ecological zone has obvious cyclic characteristics and significant axial differences.The ecological security status of the Sansheng space has both axial and cyclic differences.The ecological security status of the mountain and water vbodies increases from near to far.According to the control ideas from local to the whole and from single to composite,a classification,stratificationclassification,and hierarchical differentiation and optimization control strategy isare proposed.