A 15-year study of a lake in Canada found that eight years after the metal’s supply ceased, concentrations of methylmercury – a highly toxic substance made from mercury by bacteria in aquatic ecosystems – fell by 76 per cent in northern pike (Esox lucius) and 38 per cent in lake whitefish (Coregonus clupeaformis).
read more... https://www.newscientist.com/article/2301462-freshwater-fish-can-recover-from-mercury-pollution-in-just-a-few-years/
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