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Determining the bioavailability and toxicity of lead contamination to earthworms requires using a combination of physicochemical and biological methods. | LitMetric

Determining the bioavailability and toxicity of lead contamination to earthworms requires using a combination of physicochemical and biological methods.

Environ Pollut

Department of Ecological Science, Faculty of Earth and Life Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands. Electronic address:

Published: February 2014

AI Article Synopsis

  • - The study assessed how lead (Pb) affects the earthworm species Eisenia andrei in different shooting range soils with varying lead concentrations (47-2398 mg Pb/kg), pH (3.2-6.8), and organic matter (3.8-13%).
  • - Earthworms were tested over 28 days, revealing that lead uptake increased as soil Pb levels rose, with significant negative effects observed at concentrations above 2000 mg Pb/kg, including high mortality and inhibited reproduction.
  • - For lead concentrations below 1000 mg Pb/kg, earthworm reproduction seemed to be more influenced by soil properties like pH rather than lead levels.

Article Abstract

This study aimed at assessing the bioavailability and toxicity of lead to Eisenia andrei in shooting range soils representing different land uses (forest, grassland, bullet plot). Soils contained 47-2398 mg Pb/kg dry weight (dw), but also had different pH-CaCl2 (3.2-6.8) and organic matter contents (3.8-13%). Therefore artificial soils with different pH and organic matter contents and two natural soils were included as control soils. Earthworms were exposed for 28 days and toxicity and uptake of Pb were related to total, water and 0.01 M CaCl2 extractable and porewater Pb concentrations as well as to soil characteristics. Pb uptake in the earthworms linearly increased with increasing soil concentrations. At >2000 mg Pb/kg dw and pH 3.3-3.5, high earthworm mortality with significant weight loss and complete inhibition of reproduction were recorded. At <1000 mg/kg dw, earthworm reproduction was more related to differences in pH and other soil characteristics than to Pb.

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Source
http://dx.doi.org/10.1016/j.envpol.2013.10.017DOI Listing

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