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Located in the center of Corsica, the Haut-Vénacais massif is one of the most diversified mountainous areas in terms of vegetation landscape. This massif was chosen in the framework to an ecological and conservation status assessessment. The Potential Distance Index (PDI) developed by Penas et al. (2005) aim to quantify the distance between the current vegetation landscape and the potential vegetation within a territory. This paper presents the results of the application of this index to the Haut-Vénacais massif (Haute-Corse) to assess the natural and/or anthropogenic threats to which it may be exposed and its overall conservation status. The results show that the vegetation landscape is characterized by agro-pastoral activities: a decreasing trend is emerging from the foothills to the highest parts of the massif. The numerical and cartographic values of the IDP illustrate the conservation status of this region and allow to prioritize management policies for the enhancement or protection.