Data for: Vaux F, Craw D, Fraser CI, Waters JM. (2021). Northward range extension for Durvillaea poha bull kelp: response to tectonic disturbance? Journal of Phycology. https://doi.org/10.1111/jpy.13179 Understanding the forces that shape species distributions is increasingly important in a fast-changing world. Although major disturbance events can adversely affect natural populations, they can also present new opportunities, for example by opening up habitat for colonisation by other lineages. Following extensive geographic sampling, we use genomic data...