Polystichum marquesense
Overview
A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.
Polystichum marquesense faces severe pressure from invasive plant species that outcompete native vegetation and alter soil chemistry in its montane forest habitat. Habitat degradation from introduced ungulates, particularly feral pigs and goats, damages the understory environment where this fern establishes. The species' extremely limited range on the Marquesas Islands makes it highly vulnerable to stochastic events and climate-driven changes in precipitation patterns.
Habitat
This endemic fern inhabits montane rainforests and cloud forests of the Marquesas Islands, typically growing in shaded understory environments with high humidity and well-drained volcanic soils. It occurs at elevations between 800-1200 meters where persistent cloud cover maintains the moist conditions essential for its survival.