Population genomics of Sitka black-tailed deer supports invasive species management and ecological restoration on islands

Population genomics reveals that invasive Sitka black-tailed deer (Odocoileus hemionus sitkensis) across the Haida Gwaii archipelago, Canada, exhibit minimal genetic structure, with Moresby Island serving as a major source of migrants. This finding suggests that the entire archipelago should be treated as the primary unit for eradication efforts to prevent reinvasion and achieve ecological restoration. The study used restriction-site associated DNA sequencing (12,947 SNPs) to analyze 181 deer samples from 15 islands, identifying Moresby Island's central role in gene flow. Isolated islands like SGang Gwaay may benefit from targeted eradication combined with controlled culling and biosecurity measures to protect conservation gains.

Burgess, B. T., Irvine, R. L., & Russello, M. A. (2022). Population genomics of Sitka black-tailed deer supports invasive species management and ecological restoration on islands. Communications Biology, 5(1). https://doi.org/10.1038/s42003-022-03159-5