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Energy In Ecosystems:

Energy In Ecosystems:. Change And Stability In Ecosystems 2. Energy In Ecosystems:. Life on Earth cannot exist without a source of energy

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Energy In Ecosystems:

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  1. Energy In Ecosystems: Change And Stability In Ecosystems 2

  2. Energy In Ecosystems: • Life on Earth cannot exist without a source of energy • The source of ALL energy on our planet comes from the sun, which plants capture to carry out photosynthesis, which in turn makes food easily used by other animals • How does this energy get passed from one organism to the next? • o They feed on each other

  3. Q: What’s the difference between a food web and food chain? • Food chain –A step-by-step sequence linking organisms that feed on one another. • A food chain starts with producersand ends with consumers at the top of the chain. • (It is a straight line chain that shows only one feeding relationship)

  4. Q: What’s the difference between a food web and food chain? • Food Web: • Shows the feeding relationships of ALL organisms in an ecosystem. • Many animals eat more than one thing

  5. Food Web Food Chain Q: What is always found at the bottom of a food chain?

  6. Terms to use when talking about Food Chains and Food Webs: • Trophic Level: • A way of categorizing organisms based upon the way they gain their energy • Producer: (Autotroph) • An organism that can make its own food through photosynthesis • The first Trophic Level

  7. Examples of Producers • o Blueberry • o Birch • o Moss • o Lichens • o Algae

  8. Consumer: (Heterotroph) • An organism that feeds on other plants or other animals • The second, third….. trophic levels • There are several types of Consumers

  9. Primary Consumer: (Herbivores) • Animals that live on mostly green plants • Second Trophic Level • Examples? • o Hares • o Moose • o Caribou • o Caterpillar

  10. Secondary Consumer: (Carnivore) • Animals that eat herbivores • Third Trophic Level • Examples?? • o Fox • oMink • o Seal • o Owl

  11. Tertiary Consumer: (Also Carnivore) • Animals that eat other carnivores • Fourth+Trophic Levels • Examples??? • Same as Secondary Consumers mostly

  12. Omnivores: • Animals that eat plants and other animals • Examples • o Humans • o Bear • o Shrew • o Crow • o Trout

  13. Decomposers: • Organisms that feed on dead remains and return the nutrients to the soil • Examples?? • o Bacteria • o Fungus

  14. Herbivores (plant eaters) Carnivores (animal eaters) Consumers Omnivores (eat both plants and animals) Saprobes (decomposers)

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