CONTRIBUTION TO THE STUDY OF THE PLANT ASSOCIATIONS FROM THE SUB-ALPINE PLATEAU OF THE CEAHLĂU MOUNTAIN (I)
Journal Title: Analele Stiintifice ale Universitatii Alexandru Ioan Cuza din Iasi, Serie noua, Sectiunea II a. Biologie vegetala - Year 2007, Vol 53, Issue 0
Abstract
Our research aims to describe the plant communities from the sub-alpine plateau of the Ceahlău Mountain. So far, we recorded and described the plant communities of two associations: Artemisio petrosae-Gypsophiletum petraeae Puşcaru et al. 1956, and Potentillo chrysocraspedae-Festucetum airoides Boşcaiu 1971. The phytocoenological investigation was based on the relevés analysis. The similarity of relevés was assessed through principal component analysis. In the studied plant communities of the first association, we identified some transgressing mesophilous species like Festuca versicolor, Trisetum alpestre etc. that come into contact with phytocoenoses of the classes Elynio-Seslerietea, Asplenietea trichomanis, etc. Additionally, we recorded 4 endemic species: Androsace villosa, Eritrichium nanum, Thymus pulcherrimus, and Scabiosa lucida ssp. barbata. The differences among relevés are given by the dominance-abundance scores of Dryas octopetala, Gypsophyla petraea, Oxytropis halleri, Festuca versicolor and Helianthemum rupifragum. For the second association, the plant communities with Festuca airoides cover large areas in the sub-alpine zone, forming compact layers on gentle slopes, and at lower altitudes, as secondary vegetation. The Dacian-Balkan species Potentilla aurea ssp. chrysocraspeda has a cover percentage of up to 15%. Four endemic species were identified, as well: Campanula rotundifolia ssp. polymorpha, Campanula serrata, Thymus pulcherrinus, and Thesium kernerianum. The species responsible for this variability of plant communities are Dryas octopetala, Polytrichum commune, Potentilla aurea, Luzula luzuloides and Vaccinium myrtillus. Based on the phytocoenological table, we performed the coenotaxonomic classification and showed the other types of phytocenoses to which the studied plant communities come into contact. The plant communities of the sub-alpine plateau may differ due to the local substratum, which induces the occurrence of certain tolerant species. Probably, the heterogeneity of the local substrata induces a certain degree of variability to the communities of the same associations.
Authors and Affiliations
OANA ZAMFIRESCU, T. CHIFU, Ş. ZAMFIRESCU, C. MÂNZU
Keywords
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