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Myrtle rust (Austropuccinia psidii) is an invasive rust fungus that attacks species of the Myrtaceae family, one of the most dominant plant families in Australia. The potential extent of myrtle rust affected areas and the high number of potential host species make a species prioritisation scheme essential to direct conservation and management efforts. This study builds on previous work by: compiling an up-to-date list of myrtle rust occurrences and host species; mapping current and future climate suitability for myrtle rust; and identifying host species at risk based on range overlaps and susceptibility data.

Suitable habitat for myrtle rust is restricted to eastern and southern coastal areas of Australia, with minor areas in the Northern Territory and Western Australia. This coastal distribution remains present under future climates, with some extension in inland New South Wales and Tasmania, and a reduction of suitable habitat …