Comparison of nickel toxicity to cladocerans in soft versus hard surface waters

N.M.E. Deleebeeck, B.T.A. Muyssen, F. De Laender, C.R. Janssen, K.A.C. De Schamphelaere

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

The aims of the present study were to investigate (1) whether cladocerans living in soft water (operationally defined hardness <10 mg CaCO/L) are intrinsically more sensitive to Ni than cladocerans living in hard water (operationally defined hardness > 25 mg CaCO/L) and (2) whether a single bioavailability model can be used to predict the protective effect of water hardness on the toxicity of Ni to cladocerans in both soft and hard water. To address these research questions, acute and chronic bioassays were conducted with 10 different cladoceran species collected in soft and hard water lakes in Sweden. Soft water organisms were tested in a 'soft' and a 'moderately hard' test water (nominal hardness = 6.25 and 16.3 mg CaCO/L, respectively). Hard water organisms were tested in a 'moderately hard' and a 'hard' test water (nominal hardness = 16.3 and 43.4 mg CaCO/L, respectively). The results of the toxicity tests in the 'moderately hard' test water revealed no significant differences between the intrinsic sensitivity of soft versus hard water organisms. Modeling exercises indicated that water hardness significantly reduced Ni toxicity to both the soft and the hard water organisms tested. Although predictions of chronic toxicity were sufficiently accurate using the same log K and log K (i.e. the model parameters describing the effect of hardness) for all organisms under consideration, predictions of acute toxicity were significantly more accurate when separate log K and log K values were derived for the soft and the hard water organisms tested. This is due to the fact that the relative decrease of acute Ni toxicity to soft water organisms in 'moderately hard' compared to 'soft' test water was significantly higher than for hard water organisms in 'hard' compared to 'moderately hard' test water.
langue originaleAnglais
Pages (de - à)223-235
Nombre de pages13
journalAquatic Toxicology
Volume84
Numéro de publication2 SPEC. ISS.
Les DOIs
étatPublié - 30 août 2007
Modification externeOui

Empreinte digitale

Nickel
nickel
surface water
toxicity
Water
water hardness
Hardness
water
organisms
hardness
comparison
testing
chronic toxicity
organism
prediction
toxicity test
acute toxicity
toxicity testing
lake water
bioavailability

Citer ceci

Deleebeeck, N. M. E., Muyssen, B. T. A., De Laender, F., Janssen, C. R., & De Schamphelaere, K. A. C. (2007). Comparison of nickel toxicity to cladocerans in soft versus hard surface waters. Aquatic Toxicology, 84(2 SPEC. ISS.), 223-235. https://doi.org/10.1016/j.aquatox.2007.03.025
Deleebeeck, N.M.E. ; Muyssen, B.T.A. ; De Laender, F. ; Janssen, C.R. ; De Schamphelaere, K.A.C. / Comparison of nickel toxicity to cladocerans in soft versus hard surface waters. Dans: Aquatic Toxicology. 2007 ; Vol 84, Numéro 2 SPEC. ISS. p. 223-235.
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Deleebeeck, NME, Muyssen, BTA, De Laender, F, Janssen, CR & De Schamphelaere, KAC 2007, 'Comparison of nickel toxicity to cladocerans in soft versus hard surface waters', Aquatic Toxicology, VOL. 84, Numéro 2 SPEC. ISS., p. 223-235. https://doi.org/10.1016/j.aquatox.2007.03.025

Comparison of nickel toxicity to cladocerans in soft versus hard surface waters. / Deleebeeck, N.M.E.; Muyssen, B.T.A.; De Laender, F.; Janssen, C.R.; De Schamphelaere, K.A.C.

Dans: Aquatic Toxicology, Vol 84, Numéro 2 SPEC. ISS., 30.08.2007, p. 223-235.

Résultats de recherche: Contribution à un journal/une revueArticle

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T1 - Comparison of nickel toxicity to cladocerans in soft versus hard surface waters

AU - Deleebeeck, N.M.E.

AU - Muyssen, B.T.A.

AU - De Laender, F.

AU - Janssen, C.R.

AU - De Schamphelaere, K.A.C.

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Y1 - 2007/8/30

N2 - The aims of the present study were to investigate (1) whether cladocerans living in soft water (operationally defined hardness <10 mg CaCO/L) are intrinsically more sensitive to Ni than cladocerans living in hard water (operationally defined hardness > 25 mg CaCO/L) and (2) whether a single bioavailability model can be used to predict the protective effect of water hardness on the toxicity of Ni to cladocerans in both soft and hard water. To address these research questions, acute and chronic bioassays were conducted with 10 different cladoceran species collected in soft and hard water lakes in Sweden. Soft water organisms were tested in a 'soft' and a 'moderately hard' test water (nominal hardness = 6.25 and 16.3 mg CaCO/L, respectively). Hard water organisms were tested in a 'moderately hard' and a 'hard' test water (nominal hardness = 16.3 and 43.4 mg CaCO/L, respectively). The results of the toxicity tests in the 'moderately hard' test water revealed no significant differences between the intrinsic sensitivity of soft versus hard water organisms. Modeling exercises indicated that water hardness significantly reduced Ni toxicity to both the soft and the hard water organisms tested. Although predictions of chronic toxicity were sufficiently accurate using the same log K and log K (i.e. the model parameters describing the effect of hardness) for all organisms under consideration, predictions of acute toxicity were significantly more accurate when separate log K and log K values were derived for the soft and the hard water organisms tested. This is due to the fact that the relative decrease of acute Ni toxicity to soft water organisms in 'moderately hard' compared to 'soft' test water was significantly higher than for hard water organisms in 'hard' compared to 'moderately hard' test water.

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Deleebeeck NME, Muyssen BTA, De Laender F, Janssen CR, De Schamphelaere KAC. Comparison of nickel toxicity to cladocerans in soft versus hard surface waters. Aquatic Toxicology. 2007 août 30;84(2 SPEC. ISS.):223-235. https://doi.org/10.1016/j.aquatox.2007.03.025