1. Succession in Ecosystems
SOL BIO 9c

2. Warm-up:
Decide if you agree or disagree with each of these statements. As you read this lesson, see if you change your mind about any of the statements.
1. An ecosystem never changes.
2. Nothing grows in the area where a volcano has erupted.

3. This object was once part of a mining system used to move copper and iron ore. Today, so many forest plants have grown around it that it is barely recognizable. How do you think this happened? What do you think this object will look like after 500 more years?

4. Succession-
a series of changes in a community in which new populations of organisms gradually replace existing ones

5. Primary succession-
colonization of new sites by communities of organisms – takes place on bare rock

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

8. Primary succession- New bare rock comes from 2 sources:
2. Glaciers retreat and expose rock

9. Pioneer organisms- the first organisms to colonize a new site
Ex: lichens are the first to colonize lava rocks

10. Primary Succession-
Rock

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

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

13. 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

14. Secondary succession-
Ex:
A fire levels portions of a forest

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

16. Secondary succession-

17. Secondary succession-

18. Pond Succession

19. Pond Succession