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What are the difference between Primary succession and Secondary succession?

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Primary succession: succession that starts where no living organisms are there- these could be areas where no living organism ever existed may be a bare rock or new water body.  

Secondary succession: succession that starts in areas that somehow, lost all the living organisms that existed there. 

Primary succession occurs in:

  • newly cooled lava, 
  • bare rock, 
  • Newly created pond or reservoir.

Secondary succession begins in areas where natural biotic communities have been destroyed such as

  • In abandoned farm lands.
  • Burned or cut forest, 
  • land that have been flooded 

Since some soil or sediment is present, secondary succession is faster than primary succession. 

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