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the claim

Marine phytoplankton produce roughly half of the oxygen in Earth's atmosphere.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

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Is it true that marine phytoplankton produce roughly half of the oxygen in Earth's atmosphere?

Yes. A NOAA ocean service fact page states that roughly half of Earth's oxygen production comes from the ocean, with the majority from photosynthetic plankton. A peer-reviewed education article similarly says ocean single-celled organisms produce most of Earth's oxygen, and another paper notes phytoplankton account for half of world primary productivity.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

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Evidence for · 3
How much oxygen comes from the ocean?dot gov iconhttps icon
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How much oxygen comes from the ocean?dot gov iconhttps icon. (n.d.). oceanservice.noaa.gov. https://oceanservice.noaa.gov/facts/ocean-oxygen.html

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More for · 2
Earth's Most Important Producers: Meet the Phytoplankton!
2011
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E., M. M. & Nicole, S. (2011). Earth's Most Important Producers: Meet the Phytoplankton!. eric.ed.gov. https://eric.ed.gov/?id=EJ927233

STUDIES OF INTERACTION BETWEEN DISSOLVED METALS AND THEIR SPECIATION AND PHYTOPLANKTON IN A CONTINUOUS FLOW PHOTOBIOREACTOR
2010
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STUDIES OF INTERACTION BETWEEN DISSOLVED METALS AND THEIR SPECIATION AND PHYTOPLANKTON IN A CONTINUOUS FLOW PHOTOBIOREACTOR. (2010). univ-brest.hal.science. https://univ-brest.hal.science/hal-00502746v1

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