Environmental Science
5 years ago

River food web shows decline in toxic elements, fish safe to eat!

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Chemosphere
Vanadium and thallium exhibit biodilution in a northern river food web
Timothy D. Jardine, Lorne E. Doig, Paul D. Jones, Lalita Bharadwaj, Meghan Carr, Brett Tendler, Karl‐Erich Lindenschmidt

Paper Summary

Vanadium and thallium levels in fish from the Slave River in Canada decrease as you move up the food chain. This means that top predators have lower concentrations of these elements. Vanadium decreases by 94% with each step up the food chain, while thallium decreases by 54%. This "biodilution" effect keeps the levels of these elements in fish below harmful levels for people who eat them. More research is needed to understand how these elements move through different species and ecosystems.

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