1. KEY CONCEPT Ecological succession is a process of change in the species that make up a community.

2. Succession occurs following a disturbance in an ecosystem.
Succession regenerates or creates a community after a disturbance.
a sequence of biotic changes
damaged communities are regenerated
new communities arise in previously uninhabited areas

3. There are two types of succession.
primary succession — started by pioneer species

4. There are two types of succession.
secondary succession — started by remaining species

5. Mendenhall Glacier, Alaska

6. Evidence of succession on volcanic rock area, Maui, Hawaii

7. 200 year old lava field

8. Haleakala’s summit

9. Mt. St. Helens, Washington 25 years after 1980 eruption