No one knows what triggers the sudden onset of hypoxia, a quickly-spreading drop in ocean oxygen. Like a wildfire, hypoxia kills everything that can’t walk or swim out of harm’s way. For the first time ever, a team at the Smithsonian Tropical Research Institute (STRI) in Panama documented a hypoxic event in progress on a Caribbean coral reef. A second team applied a new approach to look for signs of hypoxic events as people colonized the coast during the last 2000 years. Their complementary results are published in the journals Nature Communications and Ecography
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