Contact: Birgitte Svennevig
University of Southern Denmark
Caption: Purple area: This ocean water holds less than 10 percent oxygen. Blue area: The Oxygen Free Zone off Peru/Chile, where bacteria produce huge amount of nitrogen. Black Arrow: Ocean current that transports the bacteria through the Oxygen Minimum Zone. (Illustration: Bo Thamdrup/SDU).
Credit: Bo Thamdrup/SDU
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