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 Natural Disasters  Unnatural Disasters ◦ Biomagnification ◦ Deforestation ◦ Global Warming ◦ Eutrophication.

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Presentation on theme: " Natural Disasters  Unnatural Disasters ◦ Biomagnification ◦ Deforestation ◦ Global Warming ◦ Eutrophication."— Presentation transcript:

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2  Natural Disasters  Unnatural Disasters ◦ Biomagnification ◦ Deforestation ◦ Global Warming ◦ Eutrophication

3 Increase in concentration of a pollutant from 1 link in a food chain to another Due to – - Bioaccumulation: increase in concentration of toxins in an organism or population - DDT & Eagles

4 Even small amounts of toxins can make it into organisms in high enough levels to cause problems Pollutants have in common: Long – lived Mobile Soluble in Water Biologically active Heavy metals like lead & mercury

5 Removal of indigenous forests & woodlands Results in: Alteration of Local and global climates Global warming Drier Climate (less plants, land holds less water) Soil Degradation (erosion & silting of water) Extinction/loss of Species Desertification Urban Development Increased Farming

6 Process where bodies of water receive excess nutrients that stimulate excessive plant growth - Especially nitrogen

7 Causes of Global Warming Industrialization Deforestation Pollution Natural Causes/Sources

8 Results of Global Warming Ave. Temperatures have risen 1.4oF/0.8oC Arctic Ice Disappearing Coral Reefs Bleaching due to warmer ocean More extreme weather events (wildfires, heat waves, tropical storms) Glaciers Melting


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