Phytoplankton, the Ocean's Oxygen Engine

Tiny ocean plants produce about half of Earth's oxygen, making phytoplankton one of the planet's most important natural systems.

Image: NASA.

The Five W's of Phytoplankton

Who

Phytoplankton, drifting plants, algae and bacteria that photosynthesize near the ocean surface.

Source: NOAA, How much oxygen comes from the ocean?

What

A natural system that turns sunlight and carbon dioxide into food and oxygen.

Source: NOAA, How much oxygen comes from the ocean?

When

Every day; marine life uses about as much oxygen as phytoplankton produce.

Source: NOAA, How much oxygen comes from the ocean?

Where

The sunlit upper layer of every ocean; satellites like NASA's PACE track it from space.

Source: NOAA, How much oxygen comes from the ocean?

Source: NASA, PACE mission

Why

Healthy oceans mean breathable air and a working food web.

Source: NOAA, How much oxygen comes from the ocean?

Impact Statement

Natural solution

About half of Earth's oxygen comes from the ocean, and most of it is made by phytoplankton, drifting plants and algae too small to see one by one. A single kind, Prochlorococcus, produces up to 20% of the oxygen in our whole biosphere. Keeping the ocean healthy keeps this oxygen engine running.

Source: NOAA, How much oxygen comes from the ocean?

For Further Information: NOAA, How much oxygen comes from the ocean?

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