negative effects in mountain ecosystems are caused by uncontrolled collection of plant species and illegal hunting of large carnivores and the balkan chamois threats are also induced by overuse of biological resources mostly for commercial purposes thus a high number of indigenous medicinal and aromatic plants species of mushrooms more than species of diatom algae species of lichens species of ferns and species of mosses are all at risk at the national level the most threatened groups of higher plants are the angiosperms flowering plants with approximately species aquatic and wetland plants are especially endangered