Abstract：
:Sediment characteristics are well known to interfere with toxicity, mainly through differences in terms of bioaccumulation. Here, with chironomids exposed to zinc in an artificial and a field sediment, we investigated the differences of zinc accumulation and of effects on the life cycle, at individual and population level. We used biology and energy-based modeling to analyze the data at all the levels of biological organization. This permits a reliable estimation of thresholds values for tissue residues. Differences in zinc tissue residues accounted for most of the differences between the results for both sediments (a factor of 11 for differences from 20 to 100 depending on the parameter which is considered). Taking into account accumulation and background variability, the differences relative to thresholds could be accounted for. However, it appeared that, once the threshold was passed, effects were much more pronounced for organisms exposed to artificial sediment compared to field sediment. We concluded that some sediment characteristics can enhance toxicity, in addition to their influence on the compound accumulation, even if the latter was the major source of differences in our study.
journal_name
Chemospherejournal_title
Chemosphereauthors
Péry AR,Ducrot V,Geffard A,Garric Jdoi
10.1016/j.chemosphere.2006.06.040subject
Has Abstractpub_date
2007-01-01 00:00:00pages
397-403issue
3eissn
0045-6535issn
1879-1298pii
S0045-6535(06)00797-1journal_volume
66pub_type
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