1. Unit 2 Ecology
Goal 5 T.L.W. develop an understanding of ecological relationships among organisms

2. Symbiotic Relationships

3. Can you identify?

4. Limiting Factors
Can be Biotic or Abiotic! Do you know the difference?

5. How might the following limiting factors influence carrying capacity?
What is carrying capacity?
How might these affect
Carrying capacity?
Food
Competition
Harsh winter

6. Biogeochemical cycles
The CARBON cycle C
Photosynthesis and cellular respiration

7. Biogeochemical cycles
Nitrogen cycle N
78% of the air is N2 , but only Bacteria can turn this form of nitrogen into useable forms by a process called N-fixation

8. Energy Transfer
Food chains & Food Webs – do you know the difference?

9. Energy Transfer
Can you identify the producers, herbivores, carnivores?

10. The 10% Rule
Only 10 % of the available energy gets transferred to the next level………..90% gets lost as????

11. Biomass The amount of living matter
At which level is biomass greatest?

12. Population growth
What determines how large a population will become?

13. Human Population Growth
Demography = the study of human population growth
Why is this important?

14. Random Sampling
Quadrant analysis is used to estimate population size when it is impossible to take an actual count.

15. Human Impacts reliance on fossil fuels causes?
Excessive CO2 leading to Global warming
YouTube - A Global Climate Change (animation)
Acid Rain
In combustion NOx and SOx react to form nitric acid and sulfuric acid causing…….
Deforestation
Clearing land and removing trees is bad because………..
it destroys habitats but reduces the amount of CO2 that can be removed from the atmosphere

16. Human Impacts
Introduction of exotic (non-native) species is bad because……………..
They out-compete native species and alter ecosystems
Snakehead fish
Kudzu plant
Fire ants
Bhurmese python

17. Human Impacts Pollution & use of pesticides