基于电路理论的生态格局识别与保护研究——以宁武县为例

Ecological pattern recognition and protection based on circuit theory

基于电路理论中电荷随机游走特性与连接模型,采用生态源地识别、生态廊道构建等生态安全格局研究一般范式,对山西省宁武县生态格局进行了研究。结果表明:1) 18块生态源地以林地和草地为主,水域和湿地为其补充,分布相对分散,占县域面积23%; 2) 41条生态廊道(含34条关键廊道,潜在廊道7条)主要围绕次生原始森林分布,由草地和灌木林地组成; 3)生态廊道改善系数介于0-9. 27,夹点区域相对集中于县域南部; 4)将生态源地、生态廊道、夹点区域、改善区组合构成了综合生态安全格局,并划定保护区、改善区和发展区等3个类型区。

With inspiration from the general research paradigm of ecological security pattern,the case study of Ningwu County about ecological pattern and protection had been conducted. Based on the charge random walk property and circuit connection model,the ecological sources and corridors were identified. There are 18 ecological source areas in the study area. It was found that these ecological source areas are dominated by forest and grassland. Waters and wetlands are complementary types. Those ecological source areas showed scattered distribution,accounting for 23% of the county’s total area. There are 41 ecological corridors,including 34 key corridors and 7 potential corridors,they are around secondary virgin forest,and are composed of grassland and shrubbery. The improvement coefficients of ecological corridors are in the range of 0-9. 27. The pinch points are mostly concentrated in the southeast of the study area. A comprehensive ecological security pattern was formed with spatially integration of the ecological sources,ecological corridors,pinch area and improved areas.On this basis,this paper delimited three types of areas including protected areas,improvement areas and development areas.