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Succession

Succession. How do communities change over time? Do ecosystems return to “normal” following a disturbance?. Ecological Succession. Predictable changes that occur in a community over time. Sometimes ecosystems die out, like in a natural disaster New ecosystems and species begin.

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Succession

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  1. Succession How do communities change over time? Do ecosystems return to “normal” following a disturbance?

  2. Ecological Succession • Predictable changes that occur in a community over time. • Sometimes ecosystems die out, like in a natural disaster • New ecosystems and species begin

  3. Primary Succession • Create new land, or sterilize existing areas. • Begins in an area with no remnants of an older community • Glacial Retreat • Volcano

  4. Pioneer Species • The first species to colonize a barren area. • After they establish a settlement, other species move in to the area • Examples • Lichen • Some types of grass • They help to make a useful environment for other animals

  5. Secondary Succession • Happens faster than Primary Succession • Soil left behind • Wildfire • Hurricane

  6. After Natural Disturbances • Often the original community is returned to it’s environment after disturbances such as hurricanes, and wildfires • Some communities are disturbed so often by storms or deforestation that they never return fully to their original community • Ecosystems may or may not always fully recover from human disturbances • Clearing and farming can sometime change the natural environment’s soil so much that it never recovers

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