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State of Oceans Rapidly Deteriorating

Posted by feww on January 4, 2015

Ocean health is being destroyed fast

Health of the oceans is deteriorating even faster than had previously been thought, says a report.

The world’s oceans are facing multiple threats including:

  • Impacts of climate change
  • Acidification
  • Overfishing
  • Habitat destruction
  • Detrimental resource extractions
  • Marine pollution
  • Dead Zones
  • Alien species introduction
  • Loss of  Fisheries

The oceans are being heated by climate change, turned less alkaline (more acidic) by absorbing ever increasing volumes of CO2, made less habitable by pollution and depopulated of marine lifeforms due to overfishing.

The size of dead zones are increasing globally due to fertilizer run-off.

‘Biggest Threat’

“The biggest threat to our Ocean’s health is climate change, with its twin super-dangers of rising sea temperatures and acidification,” says a review released by the International Program on the State of the Ocean (IPSO).

Ocean’s Health

This affects everyone, because—just like the climate—the Ocean forms one of the key operating systems of our planet. It creates more than half our oxygen, drives weather systems and modulates the atmosphere, as well as providing us with vital resources. So the Ocean functions at a fundamental ‘Earth System’ level, transcending national borders to help maintain life everywhere on Earth.

‘Extinction Risk’

“The Ocean has already absorbed more than 80% of the heat added to the climate system and around 33% of the carbon dioxide emitted by humans. Ecosystems are collapsing as species are pushed to extinction and natural habitats are destroyed,” said IPSO.

There are growing concerns based on recent research that past extinctions had involved warming seas, acidification and low oxygen levels. All of which are on the rise today, the IPSO co-coordinator, Prof Alex Rogers, told BBC News.

We are taking about 80-90 million metric tons of fish from the Ocean each year (9,000-10,000 tons every hour), he said. “The fishing methods used – as well as the sheer scale of the plunder – are having devastating effects on both the fish targeted and virtually all other marine creatures, from seabirds to coral.”

 

3 Responses to “State of Oceans Rapidly Deteriorating”

  1. BFDM said

    New research shows ocean acidification is spreading rapidly in the Arctic
    http://www.noaa.gov/news/new-research-shows-ocean-acidification-is-spreading-rapidly-in-arctic

    March 9, 2017 Ocean acidification is spreading rapidly in the western Arctic Ocean in both area and depth, potentially affecting shellfish, other marine species in the food web and communities that depend on these resources, according to new research published in Nature Climate Change by NOAA, Chinese marine scientists and other partners.

    The new research shows that between the 1990s and 2010, acidified waters expanded northward approximately 300 nautical miles from the Chukchi Sea slope off the coast of northwestern Alaska to just below the North Pole. Also, the depth of acidified waters increased from approximately 325 feet below the surface to more than 800 feet.


    This map shows where ocean acidification is spreading in the Arctic Ocean, in area and depth. (Tammy Beeson/ University of Delaware)

    Ocean acidification is occurring because the ocean is absorbing carbon dioxide from the atmosphere. When seawater absorbs carbon dioxide, its acidity is increased, which decreases the building blocks used by shellfish to grow their shells.

  2. darren williams said

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