Data and analysis scripts to accompany: Coral genetic structure in the Western Indian Ocean mirrors ocean circulation and thermal stress history

With ever-growing concerns over the conditions of coral reefs under warming oceans comes a need to better understand the connectivity and adaptive capacities of reef-building corals from across large oceanic regional extents. This dataset accompanies the published article by Guillaume et al (2026) in Evolutionary Applications, where we applied a seascape genomics approach to model (i) population connectivity and (ii) thermal adaptive potentials for two keystone coral species across the West Indian Ocean (WIO). Specifically, we sampled 345 Acropora muricata and 403 Pocillopora damicornis individuals around islands of three WIO regions–Seychelles, Mauritius, and Rodrigues–as part of a UN development programme (UNDP; funding information below). Genomic data were obtained from DNA extracted from sampled coral tissue and sequenced with DArT-seq. We used a bioinformatic pipeline to process and filter reads, which were then used to assess population structure and connectivity, identify putative genomic regions under thermal selection, and produce maps of adaptive potential across the WIO. This repository hosts one pdf per species that steps the user through all the main analyses of the publication. These pdfs have been produced using the Rmarkdown script provided, which will run when all the accompanying data (sample information, environmental variables, genomic data) are downloaded into one folder.