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Causes of Unbalanced Ecosystems

Causes of Unbalanced Ecosystems. Natural Disasters Unnatural Disasters Biomagnification Deforestation Global Warming Eutrophication. Biomagnification. Increase in concentration of a pollutant from 1 link in a food chain to another Due to –

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Causes of Unbalanced Ecosystems

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  1. Causes of Unbalanced Ecosystems

  2. Natural Disasters • Unnatural Disasters • Biomagnification • Deforestation • Global Warming • Eutrophication

  3. Biomagnification 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. Deforestation 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. Eutrophication Process where bodies of water receive excess nutrients that stimulate excessive plant growth • Especially nitrogen

  7. Global Warming 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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