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Transfer of Cd, Cu, Ni, Pb, and Zn in a soil-plant-invertebrate food chain: A microcosm study

The transfer of Cd, Cu, Ni, Pb, and Zn was evaluated in a soil‐plant (lettuce, Lactuca sativa)–invertebrate (snail, Helix aspersa) food chain during a microcosm experiment. Two agricultural soils, polluted and unpolluted, were studied. Lettuce was cultivated for eight weeks before introduction of sn...

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Published in:Environmental toxicology and chemistry 2006-03, Vol.25 (3), p.815-822
Main Authors: Scheifler, Renaud, de Vaufleury, Annette, Cœurdassier, Michaël, Crini, Nadia, Badot, Pierre-Marie
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description The transfer of Cd, Cu, Ni, Pb, and Zn was evaluated in a soil‐plant (lettuce, Lactuca sativa)–invertebrate (snail, Helix aspersa) food chain during a microcosm experiment. Two agricultural soils, polluted and unpolluted, were studied. Lettuce was cultivated for eight weeks before introduction of snails into the microcosms (M‐snails). In a parallel experiment, snails were exposed to lettuce only (i.e., without soil) in simpler exposure devices called containers (C‐snails). Snail exposure duration was eight weeks for both M‐ and C‐snails. No effects on snail survival were found. Both M‐ and C‐snails exposed to polluted soil showed a growth reduction, but only after two weeks of exposure. Time‐dependent accumulation in M‐snails exposed to the polluted environment showed a regular increase of Cd and Zn concentrations over time and a rapid increase of Pb concentrations within the first two weeks, which then remained stable. Copper and Ni concentrations did not increase during any of the experiments. Concentrations in M‐ and C‐snails were compared to estimate the relative contribution of soil and plant to the total bioaccumulation. The results suggest that the soil contribution may be higher than 80% for Pb, from 30 to 60% for Zn, and from 2 to 40% for Cd.
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subjects Agricultural land
Animal, plant and microbial ecology
Animals
Applied ecology
Bioaccumulation
Biological and medical sciences
Biological Assay
Cadmium
Ecology
Ecology - methods
Ecosystem
Ecotoxicology
Ecotoxicology, biological effects of pollution
Environmental Monitoring
Environmental Monitoring - methods
Exposure sources
Flowers & plants
Food Chain
Food chains
Fundamental and applied biological sciences. Psychology
General aspects
Heavy metal content
Helix aspersa
Helix, Snails
Invertebrata
Invertebrates
Lactuca
Lactuca - metabolism
Lactuca sativa
Lead
Lettuce
Life Sciences
Metals
Metals - analysis
Mollusca
Mollusks
Risk Assessment
Soil
Soil - analysis
Soil Pollutants
Soil Pollutants - analysis
Soil pollution
Soil testing
Terrestrial risk assessment
Terrestrial snails
Time Factors
Toxicology
Zinc
title Transfer of Cd, Cu, Ni, Pb, and Zn in a soil-plant-invertebrate food chain: A microcosm study
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