When “available” TE contents in soil were considered as the explanatory variables for accumulation in plant sand snails (Table3), quite different results were obtained. For plants, significant, albeit relatively low
(0.23 b r 2 adj b 0.54), correlations were observed for As, Cd, Ni and Pb,
while no significant correlation was evidenced for Cu and Zn. For snails,
significant correlations between “available” TE in soil and concentrations in viscera were only found for As and Cd (r 2 adj = 0.60 and 0.20,
respectively); for the other elements studied (Cr, Cu, Ni, Pb and Zn) no
significant correlations were observed.