1. Ecology: Succession
CP Biology

2. Succession
Constant changes in ecosystems in response to natural and human disturbances

3. Primary Succession Volcanoes – lava flows Glaciers expose rock
No soil present

4. Primary Succession, cont.
Pioneer Species - First species that appears in such a barren environment
Lichens form on rock and break it down to create soil
Mosses and grasses
Tree seedlings and shrubs, etc.
Climax Community – a stable fully mature ecosystem

5. Primary Succession, cont.

6. Secondary Succession
An environment is disturbed without removing the soil
Plowed field is abandoned
Forest Fires

7. Secondary Succession, cont.

8. Secondary Succession, cont.
Mosses
Tree Seedlings, shrubs, etc.
Climax Community

9. Secondary Succession, cont.