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Ecological Succession Power Point Presentations

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					      Ecological
      Succession
Predictable changes within an
ecosystem over long periods of
time.
  Primary Succession

 Brand new, virgin land that is created by
  lava flows in the ocean that have been
  cooled over time.
 No soil is present!
 Example: Hawaii
        Surtsey

 Example of primary succession.
 Formed by volcanic explosions in 1963.
Secondary Succession

  Disturbance of some kind changes an
   existing community without removing the
   soil.
  Ex: Mt. St. Helens
  Exploded in 1983
Mt. St. Helens
Example of Succession
Mt. St. Helens
Example of Secondary
    Succession
   Pioneer Species

 First organisms to inhabit newly formed
  land.
 Usually moss or lichens.
Pioneer Species
Climax Community

 A mature stable community that does not
  undergo succession.
 Example: Old Growth Forest
Climax Community

				
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