1. Succession in Ecosystems Mrs. Karim

2. Succession- a gradual changes in a community over a period of time. new populations of organisms gradually replace existing ones There are three different stages to succession: 1.Primary succession 2.Secondary succession 3.Climax Community

3. Primary succession- Life start forming in rocks, no Soil. Examples: – Lichens grow bare rock

4. Primary succession- New bare rock comes from 2 sources: 1. volcanic lava flow cools and forms rock

5. Primary succession- And the other source of rocks 2. Glaciers retreat and expose rock

6. Pioneer Species- the first organisms to colonize or grow in anew site Ex: lichens are the first to Colonize lava rocks

7. Secondary succession- sequence of community changes that takes place when a community is disrupted by natural disaster or human actions – takes place on existing soil

8. Secondary succession- Ex: A fire levels portions of a forest Soil will be left behind to start secondary succession

9. Secondary succession- Ex: A farmer plows his field

10. Climax community- a stable, mature community that undergoes little or no succession

11. Climax community- Ex: In most of Virginia, the climax community would be a deciduous oak–hickory forest

12. Vocabularies Biotic : living things. Give example Abiotic: non living things. Give examples Producers: plants …. Why? Consumers: human, animals,bacteria,… why?

13. Stages of succesion Rock

14. Label the stages of succession

15. Secondary succession-

17. Explain the stages of ecological succession

18. Succession video https://www.youtube.com/watch?v=E0qdW oLdk1c