SNP analyses reveal a diverse pool of potential colonists to earthquake‐uplifted coastlines ...

• Main Authors: Peters, Johnette, Waters, Jonathan, Dutoit, Ludovic, Fraser, Ceridwen
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: New Zealand; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.5061/dryad.573n5tb3m; https://datadryad.org/stash/dataset/doi:10.5061/dryad.573n5tb3m

In species that form dense populations, major disturbance events are expected to increase the chance of establishment for immigrant lineages. Real-time tests of the impact of disturbance on patterns of genetic structure are, however, scarce. Central to testing these concepts is determining the pool of potential immigrants dispersing into a disturbed area. In 2016, a 7.8 magnitude earthquake occurred on the South Island of New Zealand. Affecting approximately 100 km of coastline, this quake caused extensive uplift (several metres high), extirpating many intertidal populations, including keystone intertidal kelp species. Following the uplift, we set out to determine the geographic origins of detached kelp specimens which rafted into the disturbed zone. Specifically, we used genotyping-by-sequencing (GBS) approaches to compare beach-cast southern bull-kelp (Durvillea antarctica and D. poha) samples to established populations throughout the species’ ranges, and thus infer the geographic origins of potential ...