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

Botany

Lichenoindication aplication in the environmental quality assessment

(Tab. 2). Performing air quality land cadastre every 5 years in forest, forest - petrofite and urban ecosystems on the base of local ecobioindicators with the application of 6 levels scale, it will give an opportunity to collect extensive information on environment air quality and pollution trend effects.

Table 2: Gradations in air quality assessment based on abundance of lichens with different toxitolerance

S02 con- Abundance of species with

tent in the Air quality Toxitoleration degree Lichens toxitoleration different toxitoleration air, mg/m3 degree,% of substrate surface

<0,05 Clean I Highly sensitive I> 10orl< 10 and II > 75

0,05—0,1 Slightly polluted II Sensitive I — 0—10 or II - 50—75

0,1-0,2 Moderately III Moderately resistant II - 10-50 or III > 50

polluted_________________________________________________________________________

0,2—0,3 Polluted IV Highly resistant III - 10-50 or IV > 50

0,3—0,5 Heavily polluted V Desert zone IV — 10—50 or V — 1—100

>0,5 Critically VI Complete absence of Complete absence of lichens

_______________polluted________________________________lichens__________________________________

Distrubupa spatial! a gradului de poluare a aerului cu SO,

Jf

fuLi

[Ц <0.05 mg/m1 0,05-0.1 mg/m1 0,141,2 mg/m1 0,2-0.} mg/m1 HI 0,3-0,5 mg/m1

B-fJTfni

Ooáh-laoge

mb 0' —

Fig. 3: The air quality on the base of lichens indication in the forest ecosystems

Practical application of these elaborations in testing the air quality in 60 forest ecosystems throughout the RM and 2 from abroad (Romania, Ukraine), revealed that in 4 ecosystems the air is highly polluted with SO,, in 13 - the air is polluted, in 30 - moderately polluted, in 11 - low-polluted and in 4 - the air is clean (Fig. 3). These parameters are quite close to the Index of Atmospheric Purity (LAP) calculated on the basis of DeSloover et LeBlanc (1968) and Index of Poluotolerance ofTrass (1985) formulas, but with some modifications suggested by us (i.e. — application of concrete percentage value of indicator substrate coverage and not of coefficients). Even if the degree of pollution of investigated forest ecosystems, assessed through different methods (IP, IAP, AQGS) ranged from clean air (<0.05 mg/m3 air) to heavily polluted with SO,

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