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Ecological Trophic Pyramids
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• A species - • Populations - • Communities -
• All of the above live in the same area
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Producers
• Sunlight - • Only plants, some algae, and
certain bacteria can capture energy
• autotrophs. • Because they make their own food,
also called ___________
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• There are many different types of heterotrophs (consumers).
• ___________ eat plants. • __________ eat animals. • __________eat both plants and animals. • Detritivores - • Decomposers -
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• Energy flows ____________
• From ____________ to ______________
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Trophic Levels
• Each step in a food chain or food web is called a ___________.
• Each consumer depends on the trophic level below it for energy.
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3 uses of Consumed Matter
1. __________________ – building a nest, protecting young, looking for food
2. __________________– leaves, stems, bigger muscles
3. ___________ into the atmosphere 1. Most as heat
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Ecological Pyramids
• An ecological pyramid is a diagram that shows the relative amounts of energy or matter contained within each trophic level in a food chain or food web.
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Copyright Pearson Prentice Hall
Ecological Pyramids 0.1% Third-level consumers
1% Second-level consumers
10% First-level consumers
100% Producers
Energy Pyramid: Shows the relative amount of energy available at each trophic level.
Only part of the energy that is stored in one trophic level is passed on to the next level.
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–The more levels that exist between a producer and a top-level consumer in an ecosystem, the less energy that remains from the original amount.
–Only about 10 percent of the energy available within one trophic level is transferred to organisms at the next trophic level.
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3 Ecological Pyramids – What is it and how is it measured(units)?
1. Pyramid of Energy - 2. Pyramid of Biomass - 3. Pyramid of numbers -
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