 Of these six are endemic to the national park, and as noted by Parks and Wildlife Tasmania, eight have also been listed for conservation assessment (that is, whether they are vulnerable, endangered etcetera).With such a significant number of vascular and non-vascular plant species and communities inhabiting the park, the main concerns to the vegetation within the park, based on carbon content in soils, written records and both current and past pollen spectra records, appears to be fire, which the area has been shown to have a significant record of, and more recently, the threat caused by the root rot fungus "Phytophthora cinnamomi", particularly to the Buttongrass moorlands.To assist in protecting the national park from such threats, the Parks and Wildlife Service of Tasmania, in conjunction with the Department of Primary Industries, Parks, Water and Environment, developed the Melaleuca – Port Davey Area Plan and Strategic Regional Plan for "Phytophthora cinnamomi"  to ensure that "inter alia" regular monitoring and regular hygiene checks of visitors occurred.