1. notes: Succession pp

2. EARTH’S LAYERS Geosphere Hydrosphere
Earth’s rock interior that extends from the core to the crust
Hydrosphere
Portion of earth that is water

3. Atmosphere EARTH’S LAYERS Mixture of gases that surrounds earth
78% N2, 21% O2, 1% other gases
(H2O , & CO2)

4. EARTH’S LAYERS
Atmosphere
Ozone: absorbs most of the sun’s UV light.

5. EARTH’S LAYERS Biosphere Portion of earth that contains life
~ 9 km above surface and ~11km below surface

6. Disturbance
Events that change communities, remove or destroy organisms

7. Disturbance
Events that change communities, remove or destroy organisms
Abiotic examples: droughts, fires, floods etc.

8. Disturbance
Events that change communities, remove or destroy organisms
Abiotic Examples: droughts, fires, floods etc.
Biotic Examples: elephants tearing up trees, prairie dogs moving soil for burrows etc.
Human examples: bulldozing, paving etc.

9. Stability
Ability to withstand a disturbance and maintain constant conditions

10. Stability
Ability to withstand a disturbance and maintain constant conditions
Pattern seen:
↑species richness and ↑ evenness leads to ↑ stability

11. ECOLOGICAL SUCCESSION
Sequential and gradual growth of a community

12. 1. Primary succession occurs when community is first formed (expanding a community)
Microbes, lichens and mosses must create soil before other plants can grow.

13. Pioneer species: first species to dominate early in succession (small and fast growing)
Climax Community: marked by the domination of long-lived species and great diversity

15. 2. Secondary succession: occurs when succession must start over after the destruction of a climax community

16. 2. Secondary succession: occurs when succession must start over after the disturbance of a climax community
Takes place on sites that have already supported life

18. Which is primary and which is secondary?

19. Day Before Eruption

20. 1980 Eruption

23. Today

24. Create a Double Bubble for Primary and Secondary Succession
Place the following terms in bubbles
Takes ~100 years
Takes over 100+ years
Creates an ecosystem
Makes a new ecosystem
Makes a pre-existing ecosystem
Pioneer species
Disturbance occurred
Ecosystem expanding
Makes soil
Soil already present