1. Succession in Ecosystems

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 Michigan, the climax community would be a deciduous oak–hickory forest
                                                                                                                                

10. Primary succession-

11. 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

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

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

14. Secondary succession-

15. Secondary succession-

17. POND SUCCESSION

19. Pond Succession

20. Possible summary
ECOLOGICAL SUCCESSION IS WHEN SPECIES INHABIT AN AREA AFTER ONE ANOTHER. THERE ARE TWO TYPES OF SUCCESSION ONE IS PRIMARY SUCCESSION THAT IS WHEN PLANT MATERIAL FIRST GROWS FROM ROCK (NOT OUT OF ROCK). THE SECOND IS SECONDARY SUCCESSION THIS IS THE RESULT OF A NATURAL DISASTER (FIRE) BOTH INCLUDE A GRADUAL CHANGE OVERTIME IN A GIVEN AREA. A CLIMAX COMMUNITY IS ONE THAT UNDERGOES LITTLE OR NO CHANGE (FOREST). A PIONEER SPECIES IS THE FIRST ORGANISM TO INHABIT A GIVEN AREA (MOSSES)