Ecological Pyramids

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Ecological Pyramids

• Energy Pyramid
• shows energy as it moves from one feeding level
  in a food chain to another.  

Only 10 percent of energy available at each level
is transferred to next
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Pyramid of Numbers
1 hawk

• relative number of organisms at each trophic
  level

8 finches
24 worms or snails
48 green leaves
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• Biomagnification
• Increase in concentration of a substance such as
  DDT through the food chain

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