Replicar los datos para: High levels of connectivity over large distances in the diadematid sea urchin Centrostephanus sylviae

Most benthic marine invertebrates with sedentary benthic adult phases have planktonic larvae that permit connectivity between geographically isolated populations. Planktonic larval duration and oceanographic processes are vital to connecting populations of species inhabiting remote and distant islands. In the present study, we analyzed the population genetic structure of the sea urchin Centrostephanus sylviae, which inhabits only the Juan Fernández Archipelago and the Desventuradas Islands, separated by more than 800 km. For 92 individuals collected from Robinson Crusoe and Selkirk Islands (Juan Fernández Archipelago) and San Ambrosio Island (Desventuradas Islands), 7,067 single nucleotide polymorphisms (SNPs) were obtained. The results did not show a spatial genetic structure for C. sylviae; relative high migration rates were revealed between the islands. An analysis of the water circulation pattern in the area described a predominant northward water flow with periods of inverted flow, suggesting that larvae could move in both directions. Overall, this evidence suggests that C. sylviae comprises a single large population composed of individuals separated by more than 800 km.

大多数底栖海洋无脊椎动物在定居的底栖成年阶段具有浮游幼虫，这允许地理上隔离的种群之间建立连通性。浮游幼虫的持续时间和海洋学过程对于连接栖息于偏远和遥远岛屿上的物种种群至关重要。在本研究中，我们分析了仅栖息于胡安·费尔南德斯群岛和德塞文图拉斯群岛（相隔超过800公里）的海胆Centrostephanus sylviae的种群遗传结构。对于从罗宾逊 Crusoe 和塞尔柯克群岛（胡安·费尔南德斯群岛）以及圣阿梅尔西亚岛（德塞文图拉斯群岛）收集的92个个体，我们获得了7,067个单核苷酸多态性（SNPs）。结果显示，C. sylviae没有表现出空间遗传结构；岛屿间揭示了相对较高的迁移率。对该区域水流模式的分析描述了以向北为主的潮流，并伴有逆流期，这表明幼虫能够双向移动。总体而言，这一证据表明，C. sylviae由一个由相隔超过800公里的个体组成的大型单一种群。