SOIL CONTRIBUTION TO THE ELEMENTAL COMPOSITION OF EPIPHYTIC LICHENS (TUSCANY, CENTRAL ITALY)

摘要

Total concentrations of Al, Ba, Cd, Co, Cr, Cu, Fe, Mn, Mo, Pb, Sr, Ti, V and Zn in the epiphytic lichen Parmelia sulcata and superficial soils from 60 remote sampling sites in Tuscany (centrla italy) were determined to evaluate the contribution of soil to the elemental composition of the lichen. The results showed that in the Mediterranean enviornment, the trace element content of unwashed lichen samples is greatly affected by soil contamination. However, despite the strong correlations between the concentrations of lighogene elements such as Al, Fe and Ti in P. sulcata, lichen leels of these elements were not at all linearly correlated with their concentrations in the soil, suggesting that dust contamination is highly variable and probably dependent on local site characteristics.