Reconstructing the complex colonization histories of lizards across Mediterranean archipelagos

Aim: The Mediterranean Basin is a global biodiversity hotspot and has one of the longest histories of human-biota interactions. Islands host a large fraction of Mediterranean diversity and endemism, but the relative importance of natural vs. human-mediated colonization processes in shaping the distribution and genetic structure of Mediterranean island fauna remains poorly understood. Here, we combine population genomics, demographic models and palaeoshoreline reconstructions to establish the island-colonization dynamics of wall lizards in Mediterranean archipelagos.
Location: Four Mediterranean Archipelagos in Italy and Croatia
Taxon: the wall lizard Podarcis siculus
Methods: We used ddRAD sequencing to genotype 140 lizards from 23 island and mainland populations. Analyses of admixture and site frequency spectra were used to reconstruct population structure, demographic history, and variation of gene flow through time. Genomic results were integrated with paleogeographic reconstructions...

研究目的：地中海盆地为全球生物多样性热点区域，同时拥有人类与生物类群相互作用的悠久历史。岛屿承载了地中海地区大量的物种多样性与特有类群，但当前学界对于塑造地中海岛屿动物类群分布格局及遗传结构的自然殖民与人类介导殖民过程的相对重要性，仍未得到充分解析。本研究整合群体基因组学分析、种群历史模型与古海岸线重建手段，阐明地中海群岛壁蜥蜴的岛屿殖民动力学过程。
研究区域：分布于意大利与克罗地亚的4个地中海群岛。
研究类群：意大利壁蜥（Podarcis siculus）。
研究方法：本研究通过ddRAD测序技术，对来自23个岛屿与大陆种群的140只壁蜥进行基因分型。通过群体结构分析与位点频率频谱分析，重建种群结构、种群历史演化历程以及随时间变化的基因流模式。本研究将基因组学结果与古地理重建结果相结合……