food webs - mrs. gierut · avaaable as food i joule energy as food (herbivore) progressive loss of...
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FOOD CHAINSAND
FOOD WEBS
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Words to KnowProducer – an organism that makes it’s own
food (autotrophs) *Plants are producers
Consumers – an organism that has to eat to get energy (heterotrophs)
• Primary - 1st level• Secondary - 2nd level• Tertiary - 3rd level
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Types of Consumersherbivore – an organism that only
eats plants
carnivore - an organism that onlyeats meat
omnivore – an organism that eatsmeat and plants
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Decomposers
• Break down dead plants and animals
• Bacteria and fungi are two examples
• Reduces dead organisms to simpler forms of matter
• Returns them to the soil
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Energy Pyramid
• Shows the amounts of energy available at each trophic level of an ecosystem
• The higher in the pyramid, the less energy available
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Food Chain
• Shows how each living thing gets food
• Always begins with the producer
• Arrows show the flow of energy from one organism to another
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Food Web• A collection of food
chains interconnected from the same ecosystem
• Arrows show the flow of energy from one organism to another
• Multiple consumers and producers
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