Publication details

Influence of feeding and earthworm density on compound bioaccumulation in earthworms Eisenia andrei

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Year of publication 2015
Type Article in Periodical
Magazine / Source Environmental Pollution
MU Faculty or unit

Faculty of Science

Field Soil contamination adn decontamination incl. pesticides
Keywords Hydrophobic organic compounds; Artificial soil; Bioavailability; Bioaccumulation factors; Aging
Description Earthworm density and feeding during exposure to contaminated soil have been used inconsistently in bioaccumulation studies, which may lead to possible errors in risk assessment and modeling. Hydrophobic organic pollutants with a wide range of environmental properties (phenanthrene, pyrene, lindane, p,p'-DDT, and PCB 153) were used to study the effect of different earthworm densities in combination with the presence or absence of feeding on bioaccumulation factors (BAFs). Similar BAFs were found at various soil-to-worm ratios, with the exception of phenanthrene. We recommend using at least 15 g(soil dw) per earthworm. The absence of feeding doubled the BAFs and, thus, using no food ration can be considered as "the worst case scenario". Whenever food is to be applied (i.e. to ensure the validity of the test in earthworm mass loss), we suggest feeding depending on the organic carbon content of the studied soil.
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