Figure 1. Results from lifespan test with Enchytraeus crypticus when exposed to FeCl3 and Fe3O4 NM, in LUFA 2.2 soil, at the density of 1 adult organism per replicate, in terms of survival (top row: values expressed as cumulative number) and reproductive output (down row: 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.