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Causes of Unbalanced Ecosystems
Natural Disasters
Unnatural Disasters◦Biomagnification◦Deforestation◦Global Warming◦Eutrophication
Increase in concentration of a pollutant from 1 link in a food chain to anotherDue to –
- Bioaccumulation: increase in concentration of toxins in an organism or population
- DDT & Eagles
Biomagnification
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
Removal of indigenous forests & woodlandsResults 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
Deforestation
Process where bodies of water receive excess nutrients that stimulate excessive plant growth- Especially nitrogen
Eutrophication
Causes of Global Warming
• Industrialization• Deforestation• Pollution• Natural Causes/Sources
Global Warming
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