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A primary succession occurs when the change in species composition than in a previous uninhabited environment. This means no soil exists when the primary succession starts. An example of a primary succession is recently formed lava from a volcano or bare rock surfaces. Therefore, in the ecosystem animation it, is a secondary succession. I say this because a secondary succession happens after a disturbance of some sort. An example of a secondary succession would be an abandoned farmland, a forest fire, or even a place that has human activity.

  • english -

    One or more words seem to be omitted from the first sentence.

    When primary succession starts, there is no soil, only bare rock. Secondary succession begins after a some kind of disturbance occurs in this environment.

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