Dispersal barriers and opportunities drive multiple levels of phylogeographic concordance in the Southern Alps of New Zealand

Phylogeographic concordance, or the sharing of phylogeographic patterns among co-distributed species, suggests similar responses to topography or climatic history. While the orientation and timing of breaks between lineages are routinely compared, spatial dynamics within regions occupied by individual lineages provide a second opportunity for comparing responses to past events. In environments with complex topography and glacial history, such as New Zealand’s South Island, geographically nested comparisons can identify the processes leading to phylogeographic concordance between and within regional genomic clusters. Here, we used single nucleotide polymorphisms (obtained via ddRADseq) for two co-distributed forest beetle species, Agyrtodes labralis (Leiodidae) and Brachynopus scutellaris (Staphylinidae), to evaluate the role of climate change and topography in shaping phylogeographic concordance at two, nested spatial scales: do species diverge over the same geographic barriers, with si...系统地理学一致性（phylogeographic concordance），即共分布物种间共享的系统地理格局，表明这些物种对地形或气候历史具有相似的响应。尽管学界常对谱系间分化断点的方向与时间进行比较，但单个谱系所占据区域内的空间动态特征，为对比物种对历史事件的响应提供了第二重契机。在地形复杂且存在冰川作用历史的区域（如新西兰南岛），地理嵌套比较策略可识别驱动区域基因组簇间与簇内系统地理学一致性的过程。本研究利用通过双酶切简化基因组测序（ddRADseq）获得的单核苷酸多态性（single nucleotide polymorphisms）数据，针对两种共分布的森林甲虫物种——Agyrtodes labralis（球蕈甲科Leiodidae）与Brachynopus scutellaris（隐翅虫科Staphylinidae）——在两个嵌套空间尺度下，评估气候变化与地形在塑造系统地理学一致性中的作用：即物种是否在相同的地理屏障下发生分化，且