The structural and functional connectivity of the grassland plant Lychnis flos-cuculi

Understanding the relationship between structural and functional connectivity is essential for successful restoration and conservation management, particularly in intensely managed agricultural landscapes. We evaluated the relationship between structural and functional connectivity of the wetland plant Lychnis flos-cuculi in a fragmented agricultural landscape using landscape genetic and network approaches. First, we studied the effect of structural connectivity, such as geographic distance and various landscape elements (forest, agricultural land, settlements and ditch verges), on gene flow among populations as a measurement of functional connectivity. Second, we examined the effect of structural graph-theoretic connectivity measures on gene flow among populations and on genetic diversity within populations of L. flos-cuculi. Among landscape elements, forests hindered gene flow in L. flos-cuculi, whereas gene flow was independent of geographic distance. Among the structural graph-theor...厘清结构连通性与功能连通性之间的关联，对于成功开展生境修复与保护管理工作至关重要，在集约化经营的农业景观中尤为如此。本研究采用景观遗传学与网络分析方法，在破碎化农业景观中探究了湿地植物裂叶剪秋罗（Lychnis flos-cuculi）的结构连通性与功能连通性之间的关联。其一，我们以种群间基因流作为功能连通性的衡量指标，分析了地理距离、森林、农田、居民点与沟渠边缘等各类景观要素构成的结构连通性对基因流的影响。其二，我们探究了基于图论的结构连通性指标对该物种种群间基因流以及种群内遗传多样性的影响。研究结果显示，在各类景观要素中，森林会阻碍裂叶剪秋罗的基因流，而基因流与地理距离并无关联。在基于图论的结构连通性指标方面……