Ecosystems Ecology Part 3 AP Biology Ecosystems Ecology Part 3

Harvesting

Sources for Acid Precipitation

Past Acid Rain pH measurements

Effects of Acid Precipitation

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

Rachel Carson

Rising CO2 and rising temperature

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

Ozone hole over Antarctica in dark blue

Ozone Hole Size over time October 1979 October 2000

Melting Antarctic Ice