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Environmental science

Oceans lose oxygen

Oxygen is essential to most life in the ocean. An analysis shows that oxygen levels have declined by 2% in the global ocean over the past five decades, probably causing habitat loss for many fish and invertebrate species. See Letter p.335

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Figure 1: Main processes that affect ocean oxygen levels in the Southern Hemisphere.

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Correspondence to Denis Gilbert.

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Gilbert, D. Oceans lose oxygen. Nature 542, 303–304 (2017). https://doi.org/10.1038/542303a

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