1. notes: Succession pp

2. EARTH’S LAYERS Geosphere Hydrosphere Earth’s rock
Extends from core to crust
Hydrosphere
Earth’s water layer

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

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

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

6. Stability Ability to withstand a disturbance Pattern seen:
↑species richness and ↑ evenness leads to ↑ stability

7. ECOLOGICAL SUCCESSION
Sequential and gradual growth of a community
Lichen, moss  grass, shrubs,  fast-growth trees slow-growth tree

8. Primary succession: occurs when community is first formed
Microbes, lichens and mosses must create soil before other plants can grow.
Lichen, moss  grass, shrubs,  fast-growth trees slow-growth tree

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

11. Secondary succession: occurs after disturbance destroys climax community
Takes place on sites that have already supported life

12. Which is primary and which is secondary?

13. Day Before Eruption

14. 1980 Eruption

17. Today

18. 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