1. Think About It
What happens to an open field after a major fire has destroyed the area?
After a volcanic eruption, and new land is formed will life exist here again?

2. Ecological Succession
Write the information that is in BLUE in your notebook

3. Ecological Succession
How do communities change over time?

4. Ecological Succesion
Definition: predictable changes that occur in a community over time

5. Causes of Ecological Succession
Natural and human disturbances
Older organisms move out new move in
Wildfires, floods, melting of glaciers

6. Types of Ecological Succession
Primary Succession
Secondary Succesion

7. Primary Succession

8. Primary Succession First growth of community No soil exists on surface
Happens on bare rock after volcanic lava cools and forms rock
Happens after glacier melts and exposes rock

9. Human Disturbance

10. Secondary Succession

11. Secondary Succession Second growth of community
Happens after a disturbance (wildfire, abandoned cleared land)
SOIL remains in community after disturbance

12. Order of succession 1- Pioneer species: first communities to appear
2- Intermediate species
3- Climax Community- final communities

13. Organisms of Succession
Primary Succession (on rock)
Lichensmoss grass small shrubs
soft trees hardwood trees
Secondary Succession (on soil)
Small plants grasses, perrenialsshrubs, soft trees (pine) mature forest (oak, hickory)

14. Succession is Good? Bad?
Succession Good promotes growth in a community, returns nutrients to the soil after disturbance (wildfire)
Succession Bad established communities are destroyed, takes a long period of time to build climax community

15. SUCCESSION TAKES A LONG TIME

16. Succession in Water

18. Summary Questions How long does succession take?
Two types of ecological succession are…
First species to develop in succession are…
Primary succession occurs on…
Secondary succession occurs on…

19. Comparison T- chart
Create a T- chart that compares the following features of succession
Causes
Begins with…
Type of pioneer species
Length of time

20. T-chart Primary Succession Secondary Succession Causes Begins with
Type of Pioneer species
Length of Time