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Succession
Succession
Succession
Succession
Succession
Succession
Succession
Succession
Succession
Succession
Succession
Succession
Succession
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Succession

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  • Tornadoes, clear-cutting, and fires all cause secondary succession. Volcanic eruptions destroy the soil base, so succession is primary– first build soil.
  • This picture follows the story in PLT.
  • In the east, the climax community may be different than the northwest.
  • Transcript

    • 1. Launch
      • What are the main criteria for writing a good procedure?
      • What is the difference between a scientific question and a hypothesis?
      • Write a quick 5 step procedure on how you would butter toast
    • 2. Launch
      • What are the main criteria for writing a good procedure?
        • Numbered steps, does not use pronouns, specific and to the point
      • What is the difference between a scientific question and a hypothesis?
        • A scientific question is based on just finding out what the answer is. A hypothesis predicts the answer and then tests to see the result
      • Write a quick 5 step procedure on how you would butter toast
        • Will vary by student
    • 3. SUCCESSION Natural Change Over Time
    • 4. What Is Succession?
      • A series of changes over time in the kind of plants growing in an area.
    • 5. Climax Communities
      • Stable communities at the end of succession
      • Vary with location and biome
      • Persist until there is an environmental change
    • 6. Disturbances
      • Can be caused by
        • natural events (fire, volcanic eruption)
        • human activities (deforestation)
        • animal activities (grazing, pests)
    • 7. Primary Succession
      • Plants become established on land missing soil and vegetation
      • First organisms are mosses and lichens
    • 8.  
    • 9. Secondary Succession
      • Dominant plants in the community are removed, allowing new plants to colonize.
      • The first plants are called
      • “ pioneers”– fast-
      • growing, full sunlight,
      • many seeds
      Landslide caused by Hurricane Mitch
    • 10. Primary or Secondary?
    • 11. Tree Tops Valley progression
      • Climax community is an evergreen forest
    • 12. Eastern Forests
      • Often climax community is hardwood.
    • 13. What happens to the animals?
      • Each plant group changes the environment.
      • Lichens and mosses make soil,
      • Enabling annuals and weeds which produce, seeds, humus and shade,
      • Allowing perennials and shade-tolerant species,
      • Leading to young trees and other woody plants ,
      • Eventually producing a mature forest
      • As the ecosystem changes, the animals change to accommodate the available food and shelter.

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