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- W3042829853 abstract "Abstract The frequency of wildfire is expected to increase with time as a function of climate change. Recent studies in our laboratory have demonstrated that pyrogenic polycyclic aromatic hydrocarbons can cause greater‐than‐additive effects in Hyalella azteca in the presence of low concentrations of Cu. We hypothesized that freshwater animals inhabiting Cu‐contaminated sites, such as those in the vicinity of Cu mines, may be vulnerable to nonadditive toxicity from contaminants released by wildfires. To investigate the interaction between Cu and water conditioned by burnt wood ash (fire extract), we exposed H. azteca for 14 d to binary mixtures of 225 mg/kg Cu‐enriched artificial sediment (225 mg Cu/kg) and a fire extract dilution series (12.5, 25, 50, 75, and 100%). All binary mixtures of Cu‐enriched sediment and fire extract resulted in complete mortality with the exception of Cu‐enriched sediment + 12.5% fire extract. The combination of Cu‐enriched sediment with 12.5% fire extract had a more‐than‐additive effect on survival and tissue Cu concentration, but there was no reduction in growth or acetylcholinesterase activity compared to the 225 mg/kg Cu–contaminated sediment or fire extract control, respectively. Acetylcholinesterase activity was significantly reduced in amphipods exposed to fire extract, but the presence of Cu did not exacerbate this effect. The results suggest that Cu‐contaminated water bodies that receive runoff from wildfires are at risk of enhanced toxicity. Environ Toxicol Chem 2020;39:1988–1997. © 2020 SETAC" @default.
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- W3042829853 date "2020-09-25" @default.
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- W3042829853 title "The Single and Combined Effects of Wildfire Runoff and Sediment‐Bound Copper on the Freshwater Amphipod<i>Hyalella azteca</i>" @default.
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- W3042829853 doi "https://doi.org/10.1002/etc.4821" @default.
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