黄河流域中段生态源地识别与生态廊道构建

Identification of Ecological Source and Construction of Ecological Corri⁃dor in the Middle Reaches of the Yellow River Basin

【目的】以黄河流域中段为研究区,进行生态源地识别和生态廊道构建,为黄河流域中游地区的生态安全保护和生态安全规划提供指导。【方法】采用形态空间格局分析法(MSPA)和景观连通性分析识别生态源地,运用最小累积阻力模型(MCR)提取潜在生态廊道,运用重力模型方法识别出重要生态廊道。【结果】基于MSPA与景观连通性方法,共识别出19个生态源地;采用MCR与重力模型,共识别出171条潜在生态廊道、20条重要生态廊道。【结论】通过识别景观连通性及有利于物种迁徙的途径与区域,明确生态环境保护及生态修复的方向,有助于从根本上改善区域生态系统结构和功能,达到构建生态廊道和完善区域生态安全格局的目的。

[Purposes]Taking the middle section of the Yellow River Basin as the study area to identify ecological sources and construct ecological corridors can provide guidance for ecological security protec-tion and ecological security planning in the middle reaches of the Yellow River basin,which can promote the common prosperity and coordinated development of ecology and economy in this area.[Methods]In this paper,the ecological sources were identified by the morphological spatial pattern analysis(MSPA)and landscape connectivity analysis.The potential ecological corridors were extracted by the minimum cumulative resistance model(MCR),and the important ecological corridors were identified by the gravity model.[Findings]Based on MSPA and landscape connectivity method,19 ecological sources elsewhere were recognized.Using MCR and gravity model,171 potential ecological corridors and 20 important eco-logical corridors were identified.[Conclusions]Through identifying the landscape connectivity and the ways and regions conducive to species migration,this study defines the direction of ecological environ-ment protection and ecological restoration,which can provide guidance for ecological security protection and ecological security planning in the middle reaches of the Yellow River basin,fundamentally improve the structure and function of the regional ecosystem,and thus achieve the purpose of building ecological corridors and improving the regional ecological security pattern.