1. Ecosystems Ecology Part 3
AP Biology
Ecosystems Ecology
Part 3

2. Harvesting

3. Sources for Acid Precipitation

4. Past Acid Rain pH measurements

5. Effects of Acid Precipitation

6. Biomagnification Herring gull eggs 124 ppm Lake trout 4.83 ppm
Concentration of PCBs
Smelt
1.04 ppm
Zooplankton
0.123 ppm
Phytoplankton
0.025 ppm

7. Rachel Carson

8. Rising CO2 and rising temperature

9. CFC and Ozone depletion
Chlorine from CFCs interacts with ozone (O3), forming chlorine monoxide (CIO) and oxygen (O2).
Chlorine atoms O2
Chlorine O3
CIO O2
Sunlight causes Cl2O2 to break down into O2 and free chlorine atoms. The chlorine atoms can begin the cycle again.
CIO
Cl2O2
Two CIO molecules react, forming chlorine peroxide (Cl2O2).
Sunlight

10. Ozone hole over Antarctica in dark blue

11. Ozone Hole Size over time
October 1979
October 2000

12. Melting Antarctic Ice