The Dead Zones
Researchers are searching the ocean forDeadZones?areas with extremely low levels of oxygen that cannotsustain life. Last summer, a huge Dead Zone settled in onthe coast of Oregon, causing fish and crustaceans to die. Itdisappeared in the fall, but now it’s back. OceanologistJack Barth says, “What I think we are seeing is a tipping ofthe balance of the ecosystem. We don’t fully understand whatthe cause of that is.”
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