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Bio ch 13 section 6 show

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  • 1. 13.6 Pyramid Models KEY CONCEPT Pyramids model the distribution of energy and matter in an ecosystem. Collect HW: 13.6 Pages # 417-419 5 Facts/Page
  • 2. 13.6 Pyramid Models Assessment 13.5 1. How does the hydrologic cycle move water through the environment? 2. Why might farmers plant legumes such as peas to improve the nitrogen levels in the soil? 3. Explain the importance of decomposers to the overall biogeochemical cycle. 4. What is a trophic level, explain or draw it.
  • 3. 13.6 Pyramid Models An energy pyramid shows the distribution of energy among trophic levels. • Energy pyramids compare energy used by producers and other organisms on trophic levels. • Between each tier of an energy pyramid, up to 90 percent of the energy is lost into the atmosphere as heat. • Only 10 percent of the energy at each tier is transferred from one trophic level to the next. energy energy transferred lost
  • 4. 13.6 Pyramid Models Other pyramid models illustrate an ecosystem’s biomass and distribution of organisms. • Biomass is a measure of the total dry mass of organisms in a given area. tertiary 75 g/m2 consumers 150g/m2 secondary consumers primary consumers 675g/m2 producers producers 2000g/m2
  • 5. 13.6 Pyramid Models • A pyramid of numbers shows the numbers of individual organisms at each trophic level in an ecosystem. tertiary 5 consumers secondary 5000 consumers primary 500,000 consumers producers producers 5,000,000 • A vast number of producers are required to support even a few top level consumers.
  • 6. 13.6 Pyramid Models 1. Biomass The test is 2. What is most energy lost as? coming!!! 3. How much energy is lost as it moves up one level? 4. Energy Pyramid 5. Biomass Pyramid 6. Pyramid of numbers 7. Sketch an energy pyramid with four levels and place the words “producers, 1 consumer, 2 consumer, and tertiary consumer.
  • 7. 13.6 Pyramid Models HW: 15 MC on Ch-13 Ecology – Due on… HW: 14.1 Pages # 428-430 5 Facts/Page – Due on… Quiz is next – TEST: on… YEAH!!! Classwork Study Guide 13.6 P. #143-144 Reader 13.6 #1-4 Page #238 & Reader Chapter Review Page 239 #1-8
  • 8. 13.6 Pyramid Models Full Name Subject Period Chapter 13 13.1 __ 13.2 __ 13.3 __ 13.4 __ 13.5 __ 13.6 __
  • 9. 13.6 Pyramid Models CW: Make 10 Flashcards •Question on the front and Test, answer on the back when?!!! •The first flash card on top should include; •Your full name •Period •“Chapter 13 Ecology” •Date
  • 10. 13.6 Pyramid Models 15 Mult. Choice on Chapter 13 Example: 1. What is the study of how living things are connected? A. Ecology B. Ichthyology C. Herpetology No silly questions or answers.
  • 11. 13.6 Pyramid Models Text Book Work P. 423 # 18-19 P. 425 # 3

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