Habitat type-based bioaccumulation and risk assessment of metal and As contamination in earthworms, beetles and woodlice |
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Authors: | Frouke Vermeulen Nico W Van den Brink Helga D'Hav Valentine K Mubiana Ronny Blust Lieven Bervoets Wim De Coen |
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Institution: | aEcophysiology, Biochemistry and Toxicology Group (U7), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;bAlterra, Wageningen UR, Box 47, NL6700AA Wageningen, The Netherlands |
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Abstract: | The present study investigated the contribution of environmental factors to the accumulation of As, Cd, Cu, Pb and Zn in earthworms, beetles and woodlice, and framed within an exposure assessment of the European hedgehog. Soil and invertebrate samples were collected in three distinct habitat types. Results showed habitat-specific differences in soil and invertebrate metal concentrations and bioaccumulation factors when normalized to soil metal concentration. Further multiple regression analysis showed residual variability (habitat differences) in bioaccumulation that could not be fully explained by differences in soil metal contamination, pH or organic carbon (OC). Therefore, the study demonstrated that in bioaccumulation studies involving terrestrial invertebrates or in risk assessment of metals, it is not sufficient to differentiate habitat types on general soil characteristics such as pH and/or OC alone. Furthermore, simple generic soil risk assessments for Cd and Cu showed that risk characterization was more accurate when performed in a habitat-specific way. |
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Keywords: | Metals Forest Grassland Open woodland Habitat type |
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