基于最小累积阻力模型的广西生态安全格局研究

Study on the Ecological Security Pattern in Guangxi Based on Minimum Cumulative Resistance Model

关键词:  生态保护重要性评价  最小累积阻力模型  重力模型  生态安全格局

Key words:  ecological protection importance evaluation  Minimum Cumulative Resistance (MCR) model  gravity model  ecological security pattern

摘要:

构建生态安全格局是生态空间科学规划与利用的重要保障。本研究以广西作为研究区，基于生态保护重要性评价识别生态源地，利用最小累积阻力(MCR)模型和重力模型提取生态廊道与生态节点，在此基础上构建生态安全格局并对其进行优化。结果表明：①广西生态保护重要性等级处于中等及以上水平的区域面积为133 582.64 km²，占广西土地总面积的56.22%，且广西生态保护重要性等级整体呈现西北部、南部及中部较低，西南部、东北部较高的分布格局；②广西生态安全格局由18处生态源地、44条生态廊道和348个生态节点构成。基于上述结果，划分出具有针对性建设和维护需求的区域，并提出保护措施建议。本研究结果可为促进广西生态安全格局稳定性提供科学依据。

Abstract:

The construction of ecological security pattern is an important guarantee for the scientific planning and utilization of ecological space.In this study,Guangxi was taken as the research area,and the ecological source was identified based on the importance evaluation of ecological protection.The Minimum Cumulative Resistance (MCR) model and the gravity model were used to extract ecological corridors and ecological nodes.On this basis,the ecological security pattern was constructed and optimized.The research results indicate:①The area of moderate and above level of ecological protection importance in Guangxi is 133 582.64 km²,accounting for 56.22% of the land area of Guangxi.Moreover,the importance level of ecological protection in Guangxi is generally lower in the northwest,south and central regions,and higher in the southwest and northeast.②The ecological security pattern of Guangxi is composed of 18 ecological sources,44 ecological corridors and 348 ecological nodes.Based on the above results,the areas that can be targeted for construction and maintenance are divided,and suggestions for protection measures are proposed.The research results of this study can provide scientific basis for promoting the stability of the ecological security pattern in Guangxi.