Supplementary B: Methods and data tables from Integrating kelp genomic analyses and geological data to reveal ancient earthquake impacts ...

• Main Authors: Vaux, Felix, Fraser, Ceridwen I., Craw, Dave, Read, Stephen, Waters, Jonathan M.
• Format: Other Non-Article Part of Journal/Newspaper
• Language: unknown
• Published: The Royal Society 2023
• Subjects: Environmental Science; 60302 Biogeography and Phylogeography; FOS Biological sciences; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.6084/m9.figshare.22766318; https://rs.figshare.com/articles/journal_contribution/Supplementary_B_Methods_and_data_tables_from_Integrating_kelp_genomic_analyses_and_geological_data_to_reveal_ancient_earthquake_impacts/22766318

Detached buoyant kelp can disperse thousands of kilometres at sea and can colonize newly available shores in the wake of disturbances that wipe out competitors. Localized earthquake uplift can cause extirpation of intertidal kelp populations followed by recolonization. Sources of recolonizing kelp can be detectable in genomic structure of contemporary populations. Our field observations combined with LiDAR mapping identified a previously unrecognized zone of uplifted rocky coastline in a region that is slowly subsiding. Intertidal kelp ( Durvillaea antarctica ) on the uplifted section of coast is genetically distinctive from nearby populations, with genomic signatures most similar to that of kelp 300 km to the south. Genetic divergence between these locations suggests reproductive isolation for thousands of years. Combined geological and genetic data suggest that this uplift event occurred during one of four major earthquakes between 6000 and 2000 years ago, with one of the younger events most likely. ...