Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 409521
Title Bioavailability pathways underlying zinc-induced avoidance behavior and reproduction toxicity in Lumbricus rubellus earthworms.
Author(s) Ma, W.C.; Bonten, L.T.C.
Source Ecotoxicology and Environmental Safety 74 (2011)6. - ISSN 0147-6513 - p. 1721 - 1726.
Department(s) Centre for Ecosystem Studies
SS - Soil Chemistry and Nature
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) metal accumulation - organic-matter - eisenia-andrei - contaminated field - heavy-metals - soils - copper - ph - speciation - calcium
Abstract We investigated possible bioavailability pathways underlying zinc-induced avoidance behavior and sublethal reproduction impairment in Lumbricus rubellus. Clay-loam (pH 7.3) and sandy soil (three pH values of 4.3–6.0) were amended with zinc sulfate at six soil concentrations of total Zn ranging from 0.1 to 36 mmol/kg dw. Estimated and measured concentrations of free and exchangeable Zn ranged 10-4 to 7.1 mmol/l. Avoidance behavior responses were fast and could be directly predicted from the activity of free zinc ions without a modifying pH effect. The repellent effect is thus likely mediated by a direct action of Zn2+ ions on epidermal chemosensitive receptors. Body zinc uptake, however, was determined by proton competition with free Zn2+ sorption. Excess accumulation of body Zn was a good predictor of reproduction decline, which is indicative of internal zinc poisoning. The results indicated that zinc affects earthworms via both direct and indirect mechanisms of external and internal exposure.
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