AP Environmental Science / Unit 2: The Living World: Biodiversity
2.7 Ecological Succession
Notes
- Primary succession: starts on bare rock; pioneer species (lichens, mosses) build soil.
- Secondary succession: starts with soil after a disturbance (fire, abandoned farm).
- Ends in a mature climax community.
Practice
Succession after a volcanic eruption on bare rock is:
No soil yet.
Pioneer species like lichens help by:
They prepare the way.
A farm abandoned and turning into forest is:
Soil remains.
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