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2/3/16 Energy Pyramids Show Ecological Pyramids Graphic Representations Of The Relative Amounts of Energy or Matter At Each Trophic Level May be: Energy Pyramid Biomass Pyramid Pyramid of Numbers 48 • Amount of available energy decreases for higher consumers • Amount of available energy decreases down the food chain • It takes a large number of producers to support a small number of primary consumers • It takes a large number of primary consumers to support a small number of secondary consumers 49 Energy Pyramid 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. 50 51 1 2/3/16 Biomass Pyramid Pyramid of Numbers Biomass Pyramid Represents the amount of living organic matter at each trophic level. Typically, the greatest biomass is at the base of 52 the pyramid. Pyramid of Numbers Shows the relative number of individual organisms at each 53 trophic level. Understanding Pyramids Drawing Fig. 2.14, 2.15 & 2.16 Write and answer the following questions on the back of the drawing. Page 52 and 53 1. An ecological pyramid can • Draw • Label • Color • Descriptions show how ____ flows through an ecosystem. 2. Only ___% of energy is transferred to the next trophic level. 3. What is the total weight of living matter at each trophic level? 54 2