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Secondary Succession

AQA A-level BiologyPopulations in EcosystemsLesson 17 of 20

Secondary succession happens on land where a community has been removed or destroyed but the soil remains. Examples include land after a forest fire, a field that has been ploughed and then abandoned, woodland that has been felled, or ground cleared by a flood.

Because soil is already present, secondary succession does not begin with lichens or mosses. The pioneers are usually fast-growing plants such as grasses and weeds, which germinate quickly from seeds blown in or already buried in the soil. Roots, underground stems and seeds that survived the disturbance can also regrow.

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