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Dead Zones

Dead zones are areas of water so devoid of oxygen that sea life cannot live there. If phytoplankton productivity is enhanced by fertilizers or other nutrients, more organic matter is produced at the surface of the ocean. The organic matter sinks to the bottom, where bacteria break it down and release carbon dioxide. Bacteria thrives off excessive organic matter and absorb oxygen, the same oxygen that fish, crabs and other sea creatures rely on for life.    Dead zones are areas of water so devoid of oxygen that sea life cannot live there. If phytoplankton productivity is enhanced by fertilizers or other nutrients, more organic matter is produced at the surface of the ocean. The organic matter sinks to the bottom, where bacteria break it down and release carbon dioxide. Bacteria thrives off excessive organic matter and absorb oxygen, the same oxygen that fish, crabs and other sea creatures rely on for life.
Duration: 22.0 seconds
Available formats:
  320x240 (30 fps) MPEG-1   3 MB
  150x112     JPEG         1 KB
  75x56         JPEG         1 KB
  320x240     JPEG         4 KB
  720x486     Frames
  720x480 (29.97 fps) MPEG-2   14 MB
  640x480 (29.97 fps) MPEG-4   7 MB
  320x240 (30 fps) X-FLV       813 KB
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Animation Number:10056
Completed:2005-01-21
Animator:Susan Twardy (HTSI) (Lead)
Scientist:Gene Feldman (NASA/GSFC)
Writer:Rani Chohan (NASA/GSFC)
Keywords:
SVS >> Gonnelli
SVS >> Phytoplankton
 
 
Please give credit for this item to
NASA/Goddard Space Flight Center Conceptual Image Lab


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