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

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