Marisia - Maros Megyei Múzeum Évkönyve 36/1. (2016)
Botany
Sorina Stefánia MATACÄ Results and discussions Cls. Quercetea pubescenti-petraeae (Oberd. 1948, 1857) Jakuc s 1961 Ord. Orno-Cotinetalia Jakucs 1961 Al. Quercion farnetto Horvat 1954 Ass. Quercetum farnetto-cerris Georgescu 1945, Rudski 1949 (Table 1) Although the forest vegetation growing in our country was destroyed during the Würm glaciation, the Quercus farnetto and Quercus cerris populations have immigrated ever since the Boreal period and have reached their expansion climax during the Atlantic period. These thermophilic forests formed a compact area which stretched from South of Banat to Black Sea shore, and they can still be spotted in Varna (Bulgaria), on the Black Sea steep shore. Once our agricultural terrains have extensive, the area where Quercus cerris and Quercus farnetto grew has been dislocated, however numerous clusters of various distensions have lasted. Analyzing the bioform spectrum (Fig. 1), the hemicryptophytes predominance (46%) can be noticed, followed by yearly therophytes (12%). The fact that the hemicryptophytes grow in a wooden assortment emphasizes a disturbance of natural or antropic sort, and the dominant presence of therophytes suggests a high level of anthropic process [2]. Fig. 1: Bioform spectrum of Quercetum farnetto-cerris association Within the analysis on ecological categories (Fig. 2), the species’ preferences have been taken into consideration with regards to the main ecologic factors: edaphic moisture (U), air temperature (T) and the soil reaction (R) [3]. Out of all the species ass. Quercetum farnetto-cerris (51 species), by edaphic moisture, 25 species are mesophilic and 22 species are xero-mesophilic, by the air temperature, 35 species are micro-mesotherms and 11 species are moderatethermophilic, by the soil reaction, 27 species are low-acid-neutrophilous and 15 species are acid-neutrophilous. 18
