Differentiate between primary and secondary succession. Provide one example of each.

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Solution

Primary succession Secondary succession
Ecological succession taking place in an uninhabited and barren land with no history of life support. Ecological succession occurring in land previously occupied by organisms or communities.
Takes thousands of years to occur. Occurs in about 50 to 400 years.
Eg. Newly formed bare rock pioneered by lichens. Eg. Agricultural land left barren after use.

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Primary succession	Secondary succession
Ecological succession taking place in an uninhabited and barren land with no history of life support.	Ecological succession occurring in land previously occupied by organisms or communities.
Takes thousands of years to occur.	Occurs in about 50 to 400 years.
Eg. Newly formed bare rock pioneered by lichens.	Eg. Agricultural land left barren after use.