Do differences between metal body residues reflect the differences between effects for Chironomus riparius exposed to different sediments? - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemosphere Année : 2007

Do differences between metal body residues reflect the differences between effects for Chironomus riparius exposed to different sediments?

Alexandre R.R. Pery
A. Geffard
J. Garric

Résumé

Sediment characteristics are well known to interfere with toxicity, mainly through differences in terms of bioavailability. 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. Bioavailability 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 bioavailability 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, whatever the compound bioavailability, even if the latter was the major source of differences in our study.
Fichier principal
Vignette du fichier
LY2007-PUB00021067.pdf (234.79 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00453761 , version 1 (05-02-2010)

Identifiants

Citer

Alexandre R.R. Pery, V. Ducrot, A. Geffard, J. Garric. Do differences between metal body residues reflect the differences between effects for Chironomus riparius exposed to different sediments?. Chemosphere, 2007, 66 (3), p. 397 - p. 403. ⟨10.1016/j.chemosphere.2006.06.040⟩. ⟨hal-00453761⟩

Collections

URCA IRSTEA INRAE
103 Consultations
104 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More