Exposure of the marine deposit feeder Hydrobia ulvae to sediment associated LAS

Linear Alkylbenzene Sulfonates (LAS) effects (mortality, egestion rate, behaviour) on the marine deposit feeder Hydrobia ulvae were assessed in whole-sediment and water-only systems. The results were combined with a bioenergetic-based kinetic model of exposure pathways to account for the observed to...

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Bibliographic Details
Published in:Environmental pollution (1987) 2010-02, Vol.158 (2), p.529-535
Main Authors: Mauffret, A., Rico-Rico, A., Temara, A., Blasco, J.
Format: Article
Language:English
Subjects:
Alkanesulfonic Acids - analysis
Alkanesulfonic Acids - pharmacokinetics
Alkanesulfonic Acids - toxicity
Animal and plant ecology
animal behavior
Animal, plant and microbial ecology
Animals
Applied ecology
benthic organisms
Bioavailability
Biological and medical sciences
Deposit feeder
Ecotoxicology, biological effects of pollution
Fundamental and applied biological sciences. Psychology
Gastropoda
Gastropoda - drug effects
Gastropoda - metabolism
General aspects
Geologic Sediments - analysis
H. ulvae
Hydrobia ulvae
Kinetics
LAS
lethal concentration 50
Lethal Dose 50
Marine mollusc
marine sediments
Models, Chemical
mortality
Sea water ecosystems
sediment contamination
snails
sulfonates
surfactants
Synecology
toxicity
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Summary:Linear Alkylbenzene Sulfonates (LAS) effects (mortality, egestion rate, behaviour) on the marine deposit feeder Hydrobia ulvae were assessed in whole-sediment and water-only systems. The results were combined with a bioenergetic-based kinetic model of exposure pathways to account for the observed toxicity. The 10-d LC50 value based on the freely dissolved fraction was 9.3 times lower in spiked sediment (0.152 ± 0.001 (95% CI) mg/L) than in water-only (1.390 ± 0.020 (95% CI) mg/L). Consequently, the actual 10-d LC50 value (208 mg/kg) was overestimated by the Equilibrium Partitioning calculation (1629 mg/kg). This suggests that the sediment associated LAS fraction was bioavailable to the snails. It could also be due to modifications in physiological parameters in absence of sediment, the organism natural substrate. Lethality of the marine gastropod deposit feeder Hydrobia ulvae exposed to LAS in water-only system was inappropriate to predict LAS toxicity in sediment system.
ISSN:0269-7491
1873-6424
DOI:10.1016/j.envpol.2009.08.013