1. Aim: How is primary and secondary ecological succession different?
DO NOW Describe what you see is taking place in this picture.

2. Ecological Succession
Land or water communities changing over time
2 types: primary & secondary
A stable climax community is the end result of succession
An example of a climax community is a beech-maple forest or an oak-hickory forest (both hardwood forests)

3. Primary Ecological Succession
An area of bare rock changing into a beech-maple forest
Takes a long period of time to happen
As time goes on, grass replaces lichens (pioneer organisms), shrubs replace grasses, pine trees replace shrubs, oak trees replace pine trees and beech & maple trees replace oak trees

4. Image of Primary Succession

5. Death & Decomposition
As new plant life replaces old plant life, death of plants & the action of decomposers enrich soil in the area, making it more rich, allowing for more complex plant life to grow

6. Climax Community
A climax community will stay stable and exist only until a catastrophe takes place, such as a flood, fire or a volcanic eruption
If the climate or soil is the same after the catastrophe, the same climax community will grow back into existence
If the climate or soil is different, a different climax community will take the old community’s place

7. Animals
As plants in an area undergoing ecological succession change, animals change, too!

8. Secondary Ecological Succession
A process of change taking place in an area with a mature community, where a catastrophe or disturbance has taken place
Soil remains
Area will undergo secondary ecological succession
Takes less time than primary ecological succession

9. Secondary Ecological Succession

10. Primary vs. Secondary Ecological Succession

11. Video

12. Q: Primary or Secondary Ecological Succession?

13. Animation & Group Activity

14. Individual Activity On loose-leaf, answer the AIM for today
This will be your exit slip
Leave it on my desk, before you leave today!

15. Homework
Read txt. pgs & answer questions
1, 2 & 4 on pg. 64