Biodiversity refers to all species of plants, animals and microorganisms existing in an ecosystem interact (Vandermeer and Perfecto, 1995). Phytodiversity of natural grassland systems are both important in terms of feed and other possible intrinsic values generated by the multitude of species (Rotar et all.,.2009). Such an ecosystem is present in the Apuseni Mountains where the species Arnica montana L. is found in a significant proportion (Stoie et all., 2001). The objectif of our paper is to identify and describe an ecosystems of Arnica montana L. in the Bear Meadows.
The Bear Meadows pasture is located in the village of Gârda de Sus, Alba County, Apuseni Mountains at 1380 m elevation, with southern exhibition, slope about 5 % and the type of soil is districambosol. The paper presents a description of the species from Bear Meadows ecosystem and groups of plants: Poaceae, Fabaceae, Juncaceae and Cypercaeae and plants from other botanical families. Each species is analyzed in terms of its behaviour to ecological factors (light, temperature, moisture, nitrogen), which allowed defining exactly the type of lawn. Species are classified also in terms of their response to agronomic factors (suitability to mowing, to grazing and suitability to the stepp). The analysis thus allows predictions of the evolution of vegetation based on applied management to meadows.