Marisia - Maros Megyei Múzeum Évkönyve 36/1. (2016)

Botany

Regina FASOLA

lowest percentage (12%), tolerates the area just because of the presence of the Ceresnovät River (small river), which determines the presence of wet soils and wet rocks.

□Eur BMed DPont DCos BCirc Fig. 8: Floristic spectrum

12%

□ mesophilic ■ mesohygrophilic

□ xero-mesiphilic □ xerophilie

Fig. 9: Indices of humidity

As in the previous case, the temperate continental climate is the main factor determining the prevalence of species that prefer moderate mesothermal temperatures (44%), average temperatures during the growing season (from 15.5 - 21.0 C) in the studied area are perfect to increase this group of plants (Fig. 10). Climatic conditions of the studied area, more stable than in other regions of the country, are favorable for the growth and development of groups of plants with a wide ecological valence to variability of the environmental conditions, which are represented by moderately thermophilic (19%) and amfitolerante (19%). The influence of continental air masses that bring lower temperatures at the north of the country favors the presence of micro termál plants (12%) and the euri thermal species (6%).

Edaphical conditions of the ecosystem “Racovätii de Sud” characterized by the optimum — very high level of humus supply and alkaline soil (7.3 to 8.4) favored the presence of neutrophils plants. Depending on the mentioned edaphical conditions is noticed the weight of species weakly acid-neutrophils (37%), followed by acid-neutrophils plants (25%) and the lowest weight of the neutro-baziphilic and euryonic species 19% each (Fig. 11). The last two are characteristic by a very broad ecological valence, with a slight adjustment to wide variations of the soil or water pH.

□ termophilic ■amphitolerant

□ microtermal üeuritermal

Fig. 10: Temperature indicators

□ acid-neutrophilic

■ weakly acid-neutrophilic

□ neutro-baziphilic

□ euryonic

Fig. 11: Soil reaction indicators

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