In order to assess the impact of the different potential sources of contamination (i.e.,plants and soils) on snails' TE contents,we performed a
last set of simple and multiple linear regressions. Firstly, TE contents
in snails were assessed with simple regression models, using plants
contents as the sole source of contamination. Secondly, we performed
multiple regressions using TE concentrations in plants and in soils, as
explanatory variables. Lastly, TE contents in snails were estimated
taking into accounts both contamination sources and soil parameters.
Results are shown in Table 5.