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Succession

Succession. Succession. Fire, floods, volcanoes, hurricanes, and other natural disasters can change communities in a short period of time. Even without a disaster, communities change. Succession

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Succession

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  1. Succession

  2. Succession • Fire, floods, volcanoes, hurricanes, and other natural disasters can change communities in a short period of time. • Even without a disaster, communities change. • Succession • The natural processes by which one community of organisms slowly replaces another in a certain area. • 2 Types • Primary • Secondary

  3. Primary Succession • Primary Succession • The series of changes that occur in an area where no ecosystem previously existed. • Steps • Land created by volcanic eruption or retreat of glacier • No soil present • Pioneer Species • The first organisms to live in an area. • Usually lichens or mosses that grow on rocks • Break up the rocks to form soil. • Soil development • Seeds of plants land in new soil and begin to grow • Several hundred-thousand years

  4. Primary Succession

  5. Primary Succession

  6. Secondary Succession • Secondary succession • The series of changes that occur after a disturbance in an existing ecosystem. • Ex. Fires, hurricanes, tornadoes, farming, logging, or mining. • Occurs in a place where an ecosystem has previously existed • Occurs more rapidly than primary succession • Around 100 years

  7. Secondary Succession

  8. Secondary Succession

  9. Primary Secondary Restores previous ecosystem Creates new ecosystem Example: New land created by volcanic eruption Example: An area destroyed by fire Succession Summary Succession

  10. Summary Questions • How are primary and secondary succession different? • What is a pioneer species? • Give two examples of natural disturbances and two examples of human disturbances that can result in secondary succession. • Grass poking through the cracks in a sidewalk is an example of succession. Is this primary or secondary succession? Explain.

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