1. Review for Quiz on Wednesday 9/23
Textbook pp
Review for Quiz on Wednesday 9/23

2. SHORT-TERM ENVIRONMENTAL CHANGE
Environmental change that occurs quickly and affects organisms immediately
May occur over one or few generations and are less likely to result in a
permanent change in the traits found in a populations.

3. Short Term Environmental Changes
Organisms MOVE or DIE (they do not become extinct!)
Short term changes:
Tides
Seasons (differences in day and night)
Floods
Hurricanes
Fire
Drought
Pesticides
Earthquake
Volcanic Eruption

4. SEASONS, differences in day and night
Snails and birds know its time to lay eggs when days start getting longer.
Warmer temperatures, rain and longer days helps plants begin growing in spring.

5. TIDES

6. FLOODS
Soil already there so secondary succession to rebuild

7. HURRICANES
W hat kind of succession? Why?

8. FIRE
What kind of succession? Why?

9. VOLCANIC ERUPTION What kind of succession?
No soil so Primary Succession with a Pioneer Species to break
down rock into soil.
Lichens

10. DROUGHT
What kind of succession? Why?

11. PESTICIDES

12. TSUNAMI

13. LONG – TERM ENVIRONMENTAL CHANGE
Environmental change that occurs slowly over time and affects organisms over generations (populations). Populations undergo an adaptation or they risk extinction.

14. Long Term Environmental Changes
Populations are affected and they either undergo an adaptation over many generations or become extinct. Long term changes:
Movement of plates
Nuclear meltdown
Pollution
Climate Change
Extinction takes time. Organisms become threatened or endangered first.

15. MOVEMENT OF PLATES

16. Urbanization & Urban Sprawl

17. VOLCANIC ERUPTION What kind of succession?
No soil so Primary Succession with a Pioneer Species to break
down rock into soil.
Lichens

18. NUCLEAR MELTDOWN

19. CLIMATE CHANGE

20. Short Term Long Term Ex: Climate Change.
Long Term
Ex: Climate Change
Adapt or Extinction
Adaptation results in genetic mutations – populations (and organisms)
Short Term
Ex: Flood, Toxic Spill, Fire, Mudslide
No time to Adapt
Move or Die – affects organisms
Very often the consequences for environmental change are not as drastic as extinction. Populations may be reduced in number, but rather than die out, they become endangered or threatened.

25. NATURAL SELECTION