1. Ecological Succession Notes Ecosystems are constantly changing in response to natural and human disturbances. As an ecosystem changes, older inhabitants gradually die out and new organisms move in, causing further changes in the community living organisms modify their environment a little at a time

2. Ecological Succession
Series of predictable changes that occurs in a community over time
2 types
Primary succession
Secondary succession

3. Primary Succession
Succession that occurs on surfaces where no soil exists
After a lava flow, on bare rock

4. Pioneer species First species to populate the area
Lichens (fungus/algae)

5. Secondary Succession
Succession following a disturbance that destroys a community without destroying the soil
Natural events, fires, human activity

7. Climax community
Stable group of plants and animals

9. What is the difference between primary and secondary succession?