Evaluation of ecological network in surface coal mine:A case study of Shengli open pit mining area

The ecological network can be used to describe and evaluate the relationship between landscape spatial or- ganization and species persistence under habitat fragmentation conditions. The construction of ecological network can promote the connection of habitat patches,promote the migration of species,better maintain the process of species dif- fusion,and enrich biodiversity,so as to improve the stability of ecosystem. Taking the open-pit mining area of Xilinhot as the research area,According to the remote sensing image interpretation of land use types,the green landscape with high vegetation coverage was extracted,the core area important for ecology was extracted using Morphological Spatial Pattern Analysis ( MSPA). The core regions were evaluated based on the connectivity index,and 15 important core patches were selected as ecological source areas. The value of landscape resistance was assigned to the landscape of the study area,and the resistance consumption surface was constructed. The minimum cumulative model was used to construct the ecological network connection of the study area,and the importance of the constructed corridor was ana- lyzed based on the gravity model. The results show that the core area accounts for 55. 82% of the green area land- scape,and the fragmentation is serious;the ecological source area is mainly concentrated in the wetland landscape;the green space landscape takes up 88. 78% of the corridor area,the road and construction land accounts for 1. 2% ,and the mining landscape takes up 0 of the corridor area. The interaction intensity between the ecological source areas dif- fers greatly,and the suitability of the corridors is very different. Based on the extraction of the important corridors,the countermeasures of ecological network optimization were put forward.