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• W4310458235 endingPage "1406" @default.
• W4310458235 startingPage "1390" @default.
• W4310458235 abstract "Abstract The acceleration of global climate change draws increasing attention towards interactive effects of temperature and organic contaminants. Many studies reported a higher sensitivity of aquatic invertebrates towards contaminant exposure with increasing or fluctuating temperatures. The hypothesis of this study was that the higher sensitivity of invertebrates is associated with the changes of toxicokinetic processes that determine internal concentrations of contaminants and consequently toxic effects. Therefore, the influence of temperature on toxicokinetic processes and the underlying mechanisms were studied in two key amphipod species ( Gammarus pulex and Hyalella azteca ). Bioconcentration experiments were carried out at four different temperatures with a mixture of 12 exposure relevant polar organic contaminants. Tissue and medium samples were taken in regular intervals and analysed by online solid‐phase extraction liquid chromatography high‐resolution tandem mass spectrometry. Subsequently, toxicokinetic rates were modelled and analysed in dependence of the exposure temperature using the Arrhenius equation. An exponential relationship between toxicokinetic rates versus temperature was observed and could be well depicted by applying the Arrhenius equation. Due to a similar Arrhenius temperature of uptake and elimination rates, the bioconcentration factors of the contaminants were generally constant across the temperature range. Furthermore, the Arrhenius temperature of the toxicokinetic rates and respiration was mostly similar. However, in some cases (citalopram, cyprodinil), the bioconcentration factor appeared to be temperature dependent, which could potentially be explained by the influence of temperature on active uptake mechanisms or biotransformation. The observed temperature effects on toxicokinetics may be particularly relevant in non‐equilibrated systems, such as exposure peaks in summer as exemplified by the exposure modelling of a field measured pesticide peak where the internal concentrations increased by up to fourfold along the temperature gradient. The results provide novel insights into the mechanisms of chemical uptake, biotransformation and elimination in different climate scenarios and can improve environmental risk assessment." @default.
• W4310458235 created "2022-12-10" @default.
• W4310458235 creator A5010141189 @default.
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• W4310458235 date "2022-12-09" @default.
• W4310458235 modified "2023-10-14" @default.
• W4310458235 title "Speed it up: How temperature drives toxicokinetics of organic contaminants in freshwater amphipods" @default.
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• W4310458235 doi "https://doi.org/10.1111/gcb.16542" @default.
• W4310458235 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36448880" @default.
• W4310458235 hasPublicationYear "2022" @default.
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