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Author Topic: Pollution  (Read 16196 times)

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AGelbert

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Re: Pollution
« Reply #705 on: June 25, 2018, 11:20:06 pm »
Truthout

June 25, 2018

Area of Global Dead Zones Doubling Every 10 Years

Dahr Jamail, Truthout: Oceanic dead zones -- areas of low oxygen that are caused by warming waters, human pollution and runoff from fertilizers used in industrial agriculture -- number more than 400, and are growing rapidly. These dead zones not only impact marine life but also fishing industries.

SNIPPET:

Impacts on Marine Life

Scavia described how organisms unable to swim away from the dead zones — like worms and other animals that many fish feed on — will die.

“Fish that can swim will avoid the dead zone, but that often forces them into habitats that are less suitable for them, resulting in slower growth,” Scavia said. “Sometimes the fish (especially shrimp) are forced into more confined areas, making them more vulnerable to predators, including human fishing nets.”

Rabalais added that the ocean’s ability to recover from dead zones can take time. “Improvement of oxygen conditions following excess nutrient flux may take years to decades,” she said.

Rota pointed out how the commercial fishing industry in the Gulf of Mexico is impacted negatively by the dead zone. “This has impacts on some of the key prey species in the gulf, such as shrimp, crabs and Atlantic croaker,” he said, while adding that the only dead zone larger than that in the Gulf of Mexico is one in the Baltic Sea.

Scavia said we should be concerned that thousands of square miles of water on Earth have low oxygen levels. “These regions are basically ‘taken out of production,’ and if this amount of land was taken out of production, there would be significant concern,” he explained. “These dead zones also put some of our most important fisheries at risk.

Full article:

https://truthout.org/articles/area-of-global-dead-zones-doubling-every-10-years/
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