Climate Change: Oceans Running Out Of Oxygen As Temperatures Rise

[appalachiablue]

Source: BBC News

Climate change and nutrient pollution are driving the oxygen from our oceans, and threatening many species of fish. That's the conclusion of the biggest study of its kind, undertaken by conservation group IUCN.

While nutrient run-off has been known for decades, researchers say that climate change is making the lack of oxygen worse. Around 700 ocean sites are now suffering from low oxygen, compared with 45 in the 1960s.

Researchers say the depletion is threatening species including tuna, marlin and sharks.
◾Concerns over ocean heating report
◾Last decade 'on course' to be warmest
◾Birds 'shrinking' as the climate warms

The threat to oceans from nutrient run-off of chemicals such as nitrogen and phosphorus from farms and industry has long been known to impact the levels of oxygen in the sea waters and still remains the primary factor, especially closer to coasts. However, in recent years the threat from climate change has increased...


Read more: https://www.bbc.com/news/science-environment-50690995

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Slight changes can effect marine life. Waters with less oxygen favor species such as jellyfish, but are not beneficial for bigger, fast-swimming species like tuna.

"We have known about de-oxygenation but we haven't known the linkages to climate change and this is really worrying," said Minna Epps from IUCN. "Not only has the decline of oxygen quadrupled in the past 50 years but even in the best case emissions scenario, oxygen is still going to decline in the oceans."

This is unhealthy for species like tuna, marlin and some sharks that are particularly sensitive to lack of oxygen. These kinds off bigger fish have greater energy needs.



Tuna are suffering from lack of oxygen, says IUCN.

[dalton99a]

1. No more cheap tuna, and shrimp will taste different because of ocean acidification

[appalachiablue]

2. No baked jellyfish either. As kids we found tons along the shore

in summer especially, nasty organisms.

[roamer65]

3. 16 pct O2 is the magic number for humans.

Lack of O2 in the oceans means the phytoplankton are dying.

[cstanleytech]

4. I suspect if we could reduce the nutrient runoff that the higher temps would not

be nearly as much of an issue.

[JoeOtterbein]

5. K n R ! Thanks for posting!

And the opportunity to express my tears, and fears.

[rusty quoin]

6. Oh you're right

[agincourt]

7. Education about what's happening to the ocean,

should be front and center in the media every week. It is the most tangible evidence of environmental destruction of all.

[scarytomcat]

13. yes education and science

got to make it interesting not bookish but important and compelling

[PatrickforO]

8. Sounds like we'd all better vote, and

then hold the feet of those we elect to the fire to do something big about this.

[roamer65]

9. People need to change before politicians will listen.

Prime example. I put my garbage can out once a month for collection. I see most of my neighbors with full cans and more every week. That consumption level needs to stop. It is representative of a high carbon lifestyle which is killing our planet.

[James48]

10. Can we pipe in oxygen?

Maybe run some lines from oxygen concentrators into the water? Would that help add oxygen to the sea?

[truthisfreedom]

11. Like a bubbler in an aquarium?

I'm guessing that would take a lot of bubblers. Really really big ones.

[DFW]

12. That would be an effort like of putting enough space stations in orbit to form row houses n/t

[NickB79]

14. No, we cannot

The sheer volume of the current ocean dead zones is staggering, much less those expected to form in the next 50 yr.

[Kaleva]

17. There have been some success with increasing the oxygen levels in coastal areas

Such as the Chesapeake Bay and on the coast of parts of Sweden.

[Nitram]

15. Warm water holds less dissolved oxygen than cold water.

[roamer65]

19. Plus phytoplankton don't like it too hot.

https://www.sciencedaily.com/releases/2015/12/151201094120.htm

[Uncle Joe]

16. Kicked and recommended.

Thanks for the thread appalachiablue.

[yaesu]

18. I may be wrong but doesn't this also effect the gulf stream's warm water cycle which by slowing it

down would make it colder for Europe & Eastern NA?

[PitchblenDemon]

20. No Oxygen in Oceans Means---

---oui r phucked!

[bronxiteforever]

21. Kick and recommend.

[mdbl]

22. Republican Response: It's all a hoax

I just got fish for dinner at Captain D's.