1. Warm-Up Which organism is both a secondary and tertiary consumer?
Where does the energy that drives this ecosystem come from?

2. Endangered Species Organisms threatened with extinction
Once extinct, the species is gone forever!!
Caused by hunting, disease, pollution, habitat destruction

3. Endangered Species
EX: Ivory-billed woodpecker

4. Ten Animals that May Go Extinct Video

5. Biomagnification

6. Biomagnification Food web magnification
Steady increase in the concentration of harmful substances as the trophic level increases.
Lower trophic levels have smaller concentrations of contaminants than higher levels.

7. Toxic Chemicals

8. Biomagnification of DDT Video