The dynamics of mercury toxins in the oceans' food web

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Credit: Tiago Fioreze / Wikipedia

Methylmercury, a toxic form of mercury that is readily absorbed from the gastro-intestinal tract and can cause in a variety of health issues, poses a significant threat to marine animals at the top of the food web.

A new study confirms that Artic species of these animals have higher concentrations of methylmercury in their tissues compared with animals lower in the ; however, it also shows similar trends in selenium, which could help play a protective role against the of mercury.

"Methylmercury concentrations increased through the food web at greater rates than observed in several earlier studies, especially at lower latitudes," said lead author Dr. Anders Ruus, author of the Environmental Toxicology & Chemistry study.

"This corroborates earlier suggestions that biomagnification may be higher in Arctic systems and adds to our knowledge of methylmercury dynamics in the Arctic."


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More information: "Methylmercury biomagnification in an Arctic pelagic food web." Environmental Toxicology and Chemistry. doi: 10.1002/etc.3143
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Citation: The dynamics of mercury toxins in the oceans' food web (2015, August 18) retrieved 22 October 2019 from https://phys.org/news/2015-08-dynamics-mercury-toxins-oceans-food.html
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