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Growing low-oxygen zones in oceans worry scientists http://apocadocs.com/s.pl?1268145625
In some spots off Washington state and Oregon, the almost complete absence of oxygen has left piles of Dungeness crab carcasses littering the ocean floor, killed off 25-year-old sea stars, crippled colonies of sea anemones and produced mats of potentially noxious bacteria that thrive in such conditions.... "The depletion of oxygen levels in all three oceans is striking," said Gregory Johnson, an oceanographer with the National Oceanic and Atmospheric Administration in Seattle.
In some spots, such as off the Southern California coast, oxygen levels have dropped roughly 20 percent over the past 25 years. Elsewhere, scientists say, oxygen levels might have declined by one-third over 50 years.
"The real surprise is how this has become the new norm," said Jack Barth, an oceanography professor at Oregon State University. "We are seeing it year after year."
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[Read more stories about:
dead zones, holyshit, ocean warming, ocean acidification]
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