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Ecological Pyramids Foldable 1. Follow my instructions to construct your foldable. 2. Lay your foldable out flat so that you can see all four quadrants. Choose three (3) quadrants to work with and leave the fourth quadrant blank. 3. Visit the “Food Web Resources” link on the webpage and as a group, choose one (1) food web with which to work. 4. Complete the activity by correctly placing the organism into its correct trophic level. ! -Make a note of the type and number of trophic levels ! that are present in the food web that you have chosen. 5. When you’re finished, be sure to view the completed food web. Ecological Pyramids Foldable 6. Use the three flaps of your foldable to draw a pyramid of numbers, a pyramid of biomass, and a pyramid of energy for your chosen food web. ! -You may estimate the amount of biomass and ! number of organisms in each trophic level but your ! pyramid MUST have the correct number of trophic ! levels and should accurately represent the food web ! with which you worked! ! ! -The pyramid of energy should demonstrate your understanding of the 10% rule. 7. When you are finished, fold the blank flap of your foldable underneath the other three flaps and glue the flaps together to finish your ecological pyramids foldable! Ecological Pyramids Energy Pyramid Shows the relative amount of energy available at each trophic level. Organisms use about 10 percent of this energy for life processes. The rest is lost as heat. Biomass Pyramid Represents the amount of living organic matter at each trophic level. Typically, the greatest biomass is at the base of the pyramid. Pyramid of Numbers Shows the relative number of individual organisms at each trophic level.