Marisia - Maros Megyei Múzeum Évkönyve 32-34. (2014)

Botany

Knowing the distribution of the bioforms of a region is of particular importance, since it provides paleoecological information on the flora and vegetation of that region, by keeping the meaning of biotope selection in the genre content of bioform categories. (V.Cristea, 1993).

Bioforms spectrum (Fig. 3) points out the high percentage ofhemicryptophytes (52.10%) which is closely related to the position of the studied territory and of the large areas consisting of grassland. The presence of a large number of therophyte (21.01%) suggests a climate more or less arid with highly anthropogenic influence and the existence of lands with discontinuous vegetation, with many areas occupied by annual plants. A significant share is held by geophytes (11.20%) represented mainly by species with prevernal and sometimes serotinal an thesis, which is a synecological expression of the phenological rythm, as well as photic regime. Also the phanerophytes are present in a significant percentage (11.06%).

_______________________________Silvia ORO IAN, Mihaela SÁMÁRGHIJAN_______________________________

Fig. 3: Bioforms spectrum of flora in Transylvanian Plain

The complex geographical structure of the flora in the investigation area highlights the participation of numerous categories of items with different florogenetic origins, in variable proportions.

The prevalence of Eurasian elements (41.74%) can be easily noticed, with some tendencies towards mainlanders, followed by Europeans (23.53%) and Circumboreals (7.14%).

Due to historical conditions in the post-glacial period, we can also notice the presence of a significant contingent of Mediterranean (2.80%) and Europeo-Mediterranean species (3.78%) in this area.

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