Marisia - Maros Megyei Múzeum Évkönyve 32/1. (2012)
Botany
Monica NEBLEA system of classification [6, 8]. The conservation status of the habitats was assessed by the indicators considered useful in this assessment: size of the area; presence of alien species; specific composition; structure and dynamic elements of the phytocoenoses. The assessment of the conservation status of habitats (according to Article 17 of the Habitats Directive 92/43/EEC) was made by their classification into one of four categories: „good” (green), „unfavorable, inadequate” (orange), „very unfavorable” (red) and „unknown” (gray), depending on the attributes declared for each of them, threats of destruction and hazards that may cause destruction or disappearance [4]. Results and discussions 8210 Calcareous rocky slopes with chasmophytic vegetation (R 6206 South-East Carpathian Communities of the limestone, rock walls cracks with Cystopteris fragilis, Campanula carpatica, Saxifraga cuneifolia and Valeriana sambucifolia; R6202 South-East Carpathian Communities of limestone rocks with Artemisia eriantha and Gypsopbila petraea) These coenoses were identified at Ocolasu Mare, Toaca Peak, Bistra Mica well and Masa dacilor, at 1008—1900 m altitude, on surfaces of 10—15 m2. Phytocoenoses with Asplenium viride and Cystopteris fragilis are poorer in species than those with Artemisia eriantha and Gypsopbila petraea. In the latter, we found many characteristic species to the sesleriets, plant grouping whom they come in contact. Characteristic species: Asplenium viride, Artemisia eriantha, Silene zawadski. Edifying species: Asplenium viride, Cystopteris fragilis, Artemisia eriantha, Gypsopbila petraea. Frequent species in composition: Saxifragapaniculata, S. corymbosa, Polypodium vulgare, Valeriana montana, Cortusa matthioli, Campanula carpatica, Daphne mezereum, Veronica urticifolia, Mycelis muralis, Senecio ovatus, Asplenium trichomanes, Helianthemum oelandicum ssp. alpesire, Primula veris ssp. columnae, Crepis jacquinii, Carex sempervirens, Oxytropis halleri, Thymus pulcherrimus. From the structural point of view, the vegetation has a height of 5-20 cm and a covering of 40-60%. The bryophytes layer is more developed for Asplenio - Cystopteridetum fragilis Oberd. (1939) 1949 association. Habitat maintains its characteristic structure, although in some areas, biotopes with Artemisia eriantha and Gypsopbila petraea can develop into sesleriets, because of the expansion of the heliophilous and transgressive mesotherms species from Seslerietea albicantis class (Thymus pulcherrimus, Primula veris ssp. columnae, Helianthemum oelandicum ssp. alpesire, Crepis jacquinii, Anthyllis vtdneraria ssp. alpestris). These grouping have a large expansion on the limestone rocks from Ceahläu, it is well defined, with a good state of preservation on the route to Masa Dacilor, under Ocolasu Mare. These coenoses occupy lower surfaces on the Toaca Peak, being identified near the touristic routes, a potential threat to the integrity of the habitat. 68
