Figure 2. Results from lifespan test with Enchytraeus crypticus when exposed to FeCl3 and Fe3O4 NM, in LUFA 2.2 soil, at the density of 40 adult organism per replicate, in terms of survival (top row) and reproductive output per surviving adult (down row). All the values are expressed as average ± standard error. Lines represent the models fit to data. *: p<0.05 (Dunnett’s), grey asterisk: 200 mg Fe/kg soil, black asterisk: 400 mg Fe/kg soil.