京津冀地区生境质量与景观格局演变及关联性

以京津冀地区为研究区，基于InVEST生态评估模型、Fragstats景观格局指数测算平台，运用网格分析法，评估了2000~2018年京津冀地区生境质量与景观格局演变；利用空间自相关理论，分析了二者空间关联性及其时序演变特征.结果表明：京津冀地区生境质量整体呈现出“东南低、西北高”的空间分布特征；2000~2018年京津冀北部以及沿海地区生境质量大面积提升；北京-天津都市圈及其南部存在大面积生境质量衰退.京津冀山区景观格局较稳定，东南部城市群景观格局指数值变化显著，景观趋于破碎化.生境质量与景观格局特征二者具备空间关联性，但相关关系逐渐减弱，以东南部生境质量低值区集聚效应减弱最为明显.研究结果有助于揭示生境质量与景观格局的空间关联性规律，可为我国乃至世界其他类似地区生态保护与景观规划提供科学支持.

Spatiotemporal evolution and spatial correlation of habitat quality and landscape pattern over Beijing-Tianjin-Hebei region

In this study, the Beijing-Tianjin-Hebei (BTH) region was selected as the research area. Based on the InVEST model and Fragstats platform, grid analysis was used to evaluate the evolution of habitat quality and landscape pattern in the BTH region during 2000~2018. Meanwhile, the spatial autocorrelation model and LISA cluster were utilized to investigate the spatial correlation and temporal evolution characteristics between habitat quality and landscape pattern over the area. The results indicated that:first, the overall habitat quality in the BTH region showed a spatial distribution pattern that is "low in the southeast and high in the northwest". From 2000 to 2018, the habitat quality in the northern and coastal areas was improved greatly. The habitat quality in the Beijing-Tianjin metropolitan area and the south of BTH declined significantly; second, the landscape pattern in mountainous areas was relatively stable, whereas the index value of landscape pattern in the southeastern urban agglomeration changed significantly, with the landscape getting fragmented; third, the habitat quality spatially correlated with the landscape pattern, however, the correlation gradually decreased, especially in the southeast of BTH region. The results may help reveal the spatial correlation between habitat quality and landscape pattern, and provide scientific support for ecological protection and landscape planning in other similar regions in China and beyond.