posted by derrius .
how can you summarize this paragraph?
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.
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.