Ecological+Pyramids+Project+Word.pdf - Name Date APPLYING...

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Name Date Class APPLYING PRACTICES Ecological Pyramids Ecologists use ecological pyramids to understand how energy flows through an ecosystem. The different types of pyramids ecologists construct may include information on energy, the amount of biomass, or a pyramid of numbers (i.e. population size). Ecologists find the pyramid a good structure because it shows who are the primary producers (located on the bottom) as we go up the pyramid, the primary, secondary, and third-level consumers. It is now your turn to be an ecologist and illustrate how energy flows through either a stream or forest. Choose one of the two following ecosystems to construct a pyramid of biomass and a pyramid of numbers: Ecosystem: Stream Organism Trophic Level Biomass (g/ m 2 ) Population (number of individuals) Macroinvertebrate s Primary Consumers 180 29,00 0 Fish Secondary Consumers 98 308 Macrophytes Primary Producers 240 54,00 0 Osprey Tertiary Consumers 2.5 4 Ecosystem: Forest Organism Trophic Level Biomass (g/ m 2 ) Population (number of individuals)

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