重庆市景观格局脆弱性及其驱动因素研究

Study on Landscape Pattern Vulnerability and Driving Factors in Chongqing

基于景观格局指数构建重庆市景观格局脆弱性评价模型,本研究结合空间自相关Moran's?Ⅰ指数分析重庆市2015年景观格局脆弱性空间分布特征,并利用灰色关联度探讨影响脆弱性强弱的驱动因素。结果表明,低度脆弱区占比超过全市面积的50%,景观脆弱性整体较低;Moran's?I值为0.28,景观格局脆弱性空间分布具有相关性,呈现聚集状态;较高及以上脆弱区主要集聚在人类活动较活跃、各类景观交错分布的地区,低脆弱区主要分布于各类景观较连续分布、人类活动较少的地区;景观脆弱性与各影响因子间的灰色关联度值均在中度及以上,景观脆弱区空间分布与景观空间分布状况、人类活动密切相关。

Based on the landscape pattern index, the vulnerability model of landscape pattern in Chongqing was constructed. Based on the spatial autocorrelation Moran's I index, the spatial distribution characteristics of landscape pattern vulnerability in Chongqing were analyzed. The grey correlation degree was used to explore the driving factors affecting the vulnerability. The results show that the proportion of low-vulnerability areas exceeds 50% of the city's area, and the landscape vulnerability is low overall;the Moran's I value is 0.28, and the spatial distribution of landscape pattern vulnerability is correlated and shows an aggregate state;the higher and above vulnerable areas are mainly concentrated in areas where human activities are active and the landscapes are staggered, the low-vulner areas are mainly distributed in areas with more continuous landscapes and less human activities;the gray correlation degree between landscape vulnerability and each impact factor is moderate and above, the spatial distribution of landscape fragile area is closely related to the spatial distribution of landscape and human activities.