摘要：Analysis revealed six main clusters of heavy metals with similar affinities or characteristics. Zn, Cd and Pb were occurred in positive zone of PCA axis, whereas all other heavy metals occurred in negative zone. The highest Fe, Mn, Ni and Co concentrations were found in P.orbicularis, whereas the highest Cu and Cd concentrations were found in Collema subni-grescens. In summary, we found that foliose and cor-ticolous (species grow on the branches and trunks of trees) species should be used for biomonitong studies.
