Fig. 1

Schematic representation of the procedure followed in the evasion behavior response assay. A Boxes with compartments containing different conditioned soils (Methods). In each box, ten similar (in size and weight) adult healthy earthworms were put in the empty areas between both soil types. After 48 h the earthworms in each half were counted. B Boxes with compartments separated containing different conditioned soils (Methods). Five similar (in size and weight) adult healthy earthworms were put inside each conditioned soil. After 48 h the separators in each box were removed; then mobility, localization, and morphology were analyzed (Methods). At least four replicates for each assay were performed