Water pollution

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  • Created by: Owain
  • Created on: 03-01-13 14:53
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  • Water pollution
    • Heavy metals and pesticides
      • Enter food chains
        • Get more concentrated along the food chains = Bioaccumilation
          • Animals eat large numbers of prey containing heavy metals/pesticides
          • Heavy metals  and pesticides not broken down by cells
    • Fertilizers/Sewege
      • Fertilizers/sewage leached (washed) into waterways
        • Rapid growth of water plants and algae
          • Plants block out light from plants below
            • Plants below die
              • Dead plants broken down by bacteria
                • Bacteria increase in number
                  • Bacteria use oxygen for respiration
                    • Fish suffocate
                      • Water is polluted


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