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Energy flow

Energy flow. CH. 2.1. I. Energy Roles . A. An organism’s energy role is determined by how it obtains energy and how it interacts with other organisms. B. Producers. 1. Energy enters most ecosystems as Sunlight .

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Energy flow

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  1. Energy flow CH. 2.1

  2. I. Energy Roles • A. An organism’s energyrole is determined by how it obtainsenergy and how it interactswith other organisms.

  3. B. Producers • 1. Energy enters most ecosystems as Sunlight. • 2. What is the process plants use to make food? Photosynthesis is how plants make food and oxygen. • 3. An organism that can make it’s own Food is a Producer. • 4. Producersare the sourceof all food in an ecosystem.

  4. Energy Flow

  5. C. Consumers • 1. An organism that can’t make it’s own food is a Consumer. • 2. Consumers that eat only plants are Herbivores. • 3. Consumers that eat only meat are Carnivores.

  6. C. Consumers • 4. Consumers that eat both plants/animals are Omnivores. • 5. A Scavengeris a carnivore that feeds on the bodies of deadorganisms. • 6. Examples of scavengers = Catfish Vultures

  7. D. Decomposers • 1. Decomposersbreak down wastesand dead organisms and returnraw materials to the ecosystem. • 2. Decomposer are nature’s recyclers. • 3. Examples of Decomposers = • Mushrooms • Bacteria

  8. Decomposers

  9. II. Food Chains and Food Webs • A. The movement of energythrough an ecosystemcan be shown in diagrams called Food Websand Food Chains. • B. A Food Webis a series of events in which one organismeats another and obtains energy. • 1. List a Food Chain from Figure 2

  10. III. Energy Pyramids • A. What does an organism do with the energy it obtains from food? • The organism uses the Energy to move, grow, reproduce and carry out other life activities.

  11. Energy Pyramids • 1. A diagram called an Energy Pyramid shows the amount of Energythat moves from 1 Feedinglevel to another in a Food Web. • 2. Where is the most energy available? • The most energy is available at the Producer level. • 3. What happens as you move up the pyramid? Each level has LESS energy available than the Energy Level below.

  12. What happens to the Available Energy at Each Level? The amount of Energy available at each level decreases as you move UP the Energy Pyramid.

  13. Energy Pyramids • 4. Only about 10% of the energy at one level of a food web is transferred to the next higher level. • 5. The other 90% of the energy is used for the organism’s life processes or given off as heat. • 6. The amount of energy available at the Producerlevel limits the number of consumers that the Ecosystemcan support.

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