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The performance of two epiphytic lichen species (Evernia prunastri (L.) Ach.  and Parmelia sulcata Taylor) as bioindicators of heavy metal pollution in  natural areas around the city of Niš (southeastern Serbia) were evaluated.  The concentration of 19 heavy metals in lichen samples was measured by  inductively coupled plasma-optical emission spectroscopy. For the majority of  the elements the concentrations found in Parmelia sulcata Taylor were higher  than in Evernia prunastri (L.) Ach. In addition, interspecific differences in  heavy metal accumulation between Evernia prunastri (L.) Ach. and Parmelia  sulcata Taylor are observed. Parmelia sulcata Taylor showed a tendency to  accumulate Fe, Mn, Ni and Ti while Evernia prunastri (L.) Ach. preferentially  concentrated Cu on both locations. A clear distinction between lithogenic  (Mn-Cu-Ti) and atmospheric elements (Ni-Co-Cr-Ag-Pb-Hg) was achieved by  cluster analysis. [Projekat Ministarstva nauke Republike Srbije, br.  III41018, br. OI 171025, br. 172017 and br. III41017

Biological indication of heavy metal pollution in the areas of Donje Vlase and Cerje (southeastern Serbia) using epiphytic lichens