How do ecosystems change

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How do ecosystems change

  1. 1. How doecosystems change?Grade 3
  2. 2. Waysecosystemschange :
  3. 3. Volcanoes
  4. 4. Fires
  5. 5. Floods
  6. 6. ways animalschangeecosystems:
  7. 7. 1.locusts1. locusts
  8. 8. 2. beavers builddams
  9. 9. 3. earthworms dig holesin soil- bring oxygen toplant roots
  10. 10. wayspeoplechangeecosystems:
  11. 11. 1. build houses
  12. 12. 2. clear forests
  13. 13. 3. introduce new plants &animals(accidentally or on purpose)
  14. 14. 4. throw out garbage
  15. 15. 4. Air pollution

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