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Mercury cycling up the food chain through fish.

Mercury cycling up the food chain through fish.
Mercury cycling up the food chain through fish.
Mercury cycling up the food chain through fish.
Mercury cycling up the food chain through fish.
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197467
Cook, John E.
Mercury cycling up the food chain through fish.
Illustration
12/29/2011
Munson_LowOxygen-01.jpg
Caption from Oceanus magazine, Vol. 49, No. 1, page 39:
Monomethylmercury (MMHg) is the toxic form of mercury that accumulates up the food chain into fish. High levels of MMHg are found at mid-water ocean depths where oxygen levels are lowest. Are bacteria making MMHg in the open ocean as they do in sediments closer to land, or are other complex processes going on? To probe this mystery, scientists collected hundreds of seawater samples above and in the low-oxygen zone.
Illustration by Jack Cook
© Woods Hole Oceanographic Institution
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