Long-distance drifting of seaweeds driven by ocean currents is an ideal model for exploring population-level genetic connectivity and phylogeographic structure. In the Indo-Pacific convergence region, we integrated phylogeographic and ocean current data and Lagrangian particle simulations to explore how the ocean currents contributed to the biogeographical patterns and population genetic connectivity of Sargassum polycystum. The oceanographic transport and direction of gene flow was in line with contemporary ocean currents. The S. polycystum geographical dispersal from glacial refugia homogenized the footprint of genetic divergence. The multidisciplinary intersection provides insights into the evolutionary history and biogeographic conservation of tropical seaweeds in the Indo-Pacific convergence region.

洋流驱动的海藻长距离漂流是探索种群水平遗传连通性和系统地理结构的理想模型。在印度-太平洋辐合区，我们整合了系统地理和洋流数据以及拉格朗日粒子模拟，以探索洋流如何影响印度洋-太平洋的生物地理模式和种群遗传连通性。马尾藻. 海洋学运输和基因流动方向与当代洋流一致。这多囊链球菌冰川避难所的地理分散使遗传差异的足迹同质化。多学科交叉提供了对印度-太平洋辐合区热带海藻进化历史和生物地理保护的见解。