基于生态系统服务的川南经济区生态网络构建

为有利于提高区域生态系统服务功能，为形成高质量发展的国土空间格，本研究以川南经济区为研究范围，采用生态系统服务评估结果提取生态源地，采用可能连接度指数评价源地重要性程度，再采用MCR模型识别潜在廊道和生态节点，得到川南经济区生态网络总体格局.结果显示：（1）区域生态系统服务功能具有明显的空间异质性，识别出生态极重要区6133.50 km2；（2）结合生态功能重要性和景观结构重要性，共选取27块生态源地，占研究区面积的12.97%；（3）识别潜在生态廊道57条，生态节点21个，生态断裂点24个.针对网络重点要素提出了优化建议，构建了“一核五心，一带多廊”网络格局.

Construction of ecological network of Southern Sichuan economic zone based on ecosystem services theory

To improve the regional ecosystem service function and form a high-quality development land space grid, this study takes the Southern Sichuan economic zone as the research scope, uses the ecosystem service assessment results to extract the ecological source, and uses the possible connectivity index（PC） to evaluate the importance of the source. Then, the minimum cumulative resistance (MCR) model was used to indentify the potential ecological networks and ecological nodes and the overall pattern of the ecological network in the South Sichuan Economic Zone was obtained. The results show that：(1) The ecosystem service function of the Southern Sichuan economic zone has obvious spatial heterogeneity and 6133.50 km2 of extremely important ecological areas were identified. (2) Combined with the importance of ecological function and landscape structure, a total of 27 ecological sources were selected, accounting for 12.97% of the study area.(3) The 57 potential ecological corridors, 21 ecological points and 24 ecological fragile points were identified. Finally, this paper puts forward optimization suggestions for key elements of the ecological network and builds an ecological network pattern of “One core five centers, and one belt multi corridors”.