1. Succession in Ecosystems
Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books. John Lubbock

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

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

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

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

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

7. Primary Succession-
Rock

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

9. Climax community-
Ex: In most of Oregon the climax community would be a Douglas Fir Tree
                                                                                                                                

10. Primary succession-

11. How strange that nature does not knock, and yet does not intrude
How strange that nature does not knock, and yet does not intrude! Emily Dickinson

12. 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

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

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

15. Look deep into nature, and then you will understand everything better
Look deep into nature, and then you will understand everything better. Albert Einstein

16. Secondary succession-

17. Secondary succession-

18. This New York Landscape was taken over by nature depicted in the movie “I am Legend”