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- `Primary succession & Secondary succession '.
http://wiki.answers.com/Q/What_are_the_two_types_o...
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Ecological succession is the observation of changes that occur in a particular ecological community of over time. Species within the ecological community can become less abundant
http://answers.ask.com/Science/Other/what_is_ecolo...
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Pioneer species of primary ecological succession
http://www.chacha.com/question/what-are-three-type...
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Ecological succession is the gradual change in the make-up of a biological community over time. In the process of ecological succession, organisms that are present at one stage change
http://wiki.answers.com/Q/What_is_the_Process_of_E...
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