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Dead Zones

  1. Saving Our Oceans (
      Provides a presentation by Sylvia Earle. 09-10

  1. -Warming Waters Worsen Oxygen Deprivation (CBS News)
      "Global warming is likely playing a bigger role than previously thought in dead zones in oceans, lakes and rivers around the world and it's only going to get worse, according to a new study." 11-14

  2. Artificial Dead Zones to Help Predict Future Dead Zones (
      "Predicting the spread of dead zones on the seafloor could get easier if scientists know what to look for in marine life behavior. Their solution: Create a tiny, artificial dead zone that simulates how bottom dwellers fight for survival in an oxygen-deprived environment." 08-10

  3. Dead Zones (
      "Dead zones are hypoxic (low-oxygen) areas in the world's oceans, the observed incidences of which have been increasing since oceanographers began noting them in the 1970s. These occur near inhabited coastlines, where aquatic life is most concentrated. (The vast middle portions of the oceans which naturally have little life are not considered "dead zones".) The term can also be applied to the identical phenomenon in large lakes." 08-10

  4. Enormous Dead Zone in the Gulf (CNN News)
      "Scientists have recorded one of the largest 'dead zones' in the Gulf's history this year. This oxygen-sapped area -- currently about the size of New Jersey -- is caused in large part by fertilizer that funnels into the ocean from Midwestern farms, since more than 40 percent of the land in the United States drains into the Gulf."

      "The fertilizer kicks off a chain reaction of biological processes that, in the end, drains the water of oxygen and kills fish, shrimp and other marine creatures that can't swim away."

      "Early testing indicates that the ocean ecosystem is already under intense stress: It takes less fertilizer pollution today, for example, to produce a large dead zone in the Gulf than it did several years ago."

      "That's a sign that the dead zone will continue to grow unless fertilizer levels are cut drastically." 08-10


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