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1. • • Water doesn’t hold much oxygen, so lakes and the oceans are relatively low in oxygen, especially if the water is warm. Oxygen made in the water by growing plants tends to form bubbles that rise and escape to the air above. Aquariums often need “bubblers” to add air to the water and give the fish enough oxygen to breathe.
     www.e-education.psu.edu/earth104/node/1008

     Oxygen in Water | EARTH 104: Earth and the Environment ...

2. People also ask

   What causes a loss of oxygen in the ocean?

   • The loss of oxygen in the ocean has two major causes: Ocean warming-driven deoxygenation: Warmer ocean water holds less oxygen and is more buoyant than cooler water. This leads to reduced mixing of oxygenated water near the surface with deeper waters, which naturally contain less oxygen. Warmer water also raises oxygen demand from living organisms.

   Ocean deoxygenation - resource - IUCN

   www.iucn.org/resources/issues-brief/ocean-deoxygenation

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   How much oxygen is lost in anoxic ocean waters?

   • The volume of anoxic ocean waters – areas completely depleted of oxygen – has quadrupled since the 1960s. Evidence suggests that temperature increases explain about 50% of oxygen loss in the upper 1000 m of the ocean.

   Ocean deoxygenation - resource - IUCN

   www.iucn.org/resources/issues-brief/ocean-deoxygenation

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   Why is deoxygenation a problem in the ocean?

   • As plastic waste pollutes the oceans and fish stocks decline, unseen below the surface another problem grows: deoxygenation. Breitburg et al. review the evidence for the downward trajectory of oxygen levels in increasing areas of the open ocean and coastal waters.

   Declining oxygen in the global ocean and coastal waters | Science - AAAS

   www.science.org/doi/10.1126/science.aam7240

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   Where does oxygen come from in water?

   • More commonly, though, oxygen is present in the water but scarce in the sediments beneath. Almost everywhere in lakes and the ocean, sediment is piling up at the bottom. This may include large pieces of rock—sand and gravel—washed into the water by rivers, or carried across by melting icebergs and dropped.

   Oxygen in Water | EARTH 104: Earth and the Environment (Development)

   www.e-education.psu.edu/earth104/node/1008

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   What happens if you run water in the ocean?

   • Running water, or fast currents in the ocean, do this job in nature, picking up a little oxygen at the surface and taking it down to fish and worms and other creatures. But if the currents are slow and a lot of dead plants are sinking, the bottom of the ocean or a swamp or lake may have more plants to be “burned” than oxygen to burn them.

   Oxygen in Water | EARTH 104: Earth and the Environment (Development)

   www.e-education.psu.edu/earth104/node/1008

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   Why is oxygen important in the ocean?

   • Oxygen is fundamental to biological and biogeochemical processes in the ocean. Its decline can cause major changes in ocean productivity, biodiversity, and biogeochemical cycles.

   Declining oxygen in the global ocean and coastal waters | Science - AAAS

   www.science.org/doi/10.1126/science.aam7240

   See all results for this question

3. www.sciencealert.com › earths-water-is-rapidlyEarth's Water Is Rapidly Losing Oxygen, And The Danger Is ...

   www.sciencealert.com › earths-water-is-rapidly

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   Jul 19, 2024 · Supplies of dissolved oxygen in bodies of water across the globe are dwindling rapidly, and scientists say it's one of the greatest risks to Earth's life support system. It's getting harder to breathe down there.

4. www.e-education.psu.edu › earth104 › nodeOxygen in Water | EARTH 104: Earth and the Environment ...

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   Water doesn’t hold much oxygen, so lakes and the oceans are relatively low in oxygen, especially if the water is warm. Oxygen made in the water by growing plants tends to form bubbles that rise and escape to the air above.

5. Videos

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     1:27

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     Ask Andrew: How can lakes have no oxygen when water contains H2O?

     Jan 30, 2023

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     Can the ocean run out of oxygen? - Kate Slabosky

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     What If the World Lost Oxygen for Five Seconds?

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6. www.smithsonianmag.com › blogs › smithsonianWait, the Ocean Is Losing Oxygen? Q&A With Denise Breitburg

   www.smithsonianmag.com › blogs › smithsonian

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   Jul 19, 2024 · According to a recent paper, the number of freshwater and coastal water bodies with little to no oxygen has increased in coastal areas, with hundreds of regions affected worldwide.

   • Author: Mona Patterson

7. www.science.org › doi › 10Declining oxygen in the global ocean and coastal waters

   www.science.org › doi › 10

   Jan 5, 2018 · In estuaries and other coastal systems strongly influenced by their watershed, oxygen declines have been caused by increased loadings of nutrients (nitrogen and phosphorus) and organic matter, primarily from agriculture; sewage; and the combustion of fossil fuels.

   • Author: Denise L. Breitburg, Lisa A. Levin, Andreas Oschlies, Marilaure Grégoire, Francisco P. Chavez, Danie...

   • Publish Year: 2018

8. www.nature.com › articles › 542303aOceans lose oxygen - Nature

   www.nature.com › articles › 542303a

   Feb 16, 2017 · Many studies have shown that the oceans are warming because of increased carbon dioxide emissions associated with human activities. It is therefore legitimate to wonder whether the...

   • Author: Denis Gilbert
   • Email: denis.gilbert@dfo-mpo.gc.ca

   • Publish Year: 2017

9. www.iucn.org › resources › issues-briefOcean deoxygenation - resource - IUCN

   www.iucn.org › resources › issues-brief

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   The loss of oxygen in the ocean has two major causes: Ocean warming-driven deoxygenation: Warmer ocean water holds less oxygen and is more buoyant than cooler water. This leads to reduced mixing of oxygenated water near the surface with deeper waters, which naturally contain less oxygen. Warmer water also raises oxygen demand from living organisms.

10. www.nature.com › articles › s41561/018/0152-2Drivers and mechanisms of ocean deoxygenation - Nature

    www.nature.com › articles › s41561/018/0152-2

    Jun 11, 2018 · The existence of relatively small water volumes with low to no oxygen, also called oxygen minimum zones (OMZs), is a natural phenomenon in today’s ocean 9, most intense in subsurface waters...