ENERGY PYRAMIDS
This is the level of an energy that contains the greatest amount of energy.
What are the producers?
This is the term for an organism that gets energy by eating other organisms.
What is a consumer?
These organisms capture energy from sunlight and manufacture their own food.
What are producers?
This is what happens when a species completely disappears from an ecosystem.
What is extinction?
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Using the 10% rule, if producers contain 10,000 J of energy, this is approximately how much energy the primary consumers receive.
What is 1,000 J?
A rabbit eats grass. This is the rabbit's trophic role.
What is a primary consumer or second trophic level?
This is the primary source of energy for most producers.
What is sunlight?
A prairie ecosystem contains producers, primary consumers, secondary consumers, and tertiary consumers. The greatest amount of energy is transferred between these two levels.
What are the producers and primary consumers?
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If primary consumers have 500 J of energy, this is approximately how much energy is available to secondary consumers.
What is 50 J?
When two organisms depend on the same limited food source, this interaction occurs.
What is competition?
These organisms break down dead producers and consumers and help recycle materials.
What are decomposers?
A population of manatees becomes extinct. The manatees had been eating certain producers in their ecosystem. What would most likely happen to those producers?
What is their population could increase?
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This is the main reason the amount of available energy decreases as you move higher in an energy pyramid.
What is energy being used by organisms for life processes and much of it being lost as heat?
If a major food source in a food web disappears, this is one likely result for the organisms that depend on it.
What is a decrease in their population because less energy is available?
An organism eats a primary consumer. Which trophic level does that organism most likely occupy?
What is the secondary consumer level, 3rd trophic level?
If many plants in an ecosystem die, which organism would most likely be affected first?
What is a primary consumer that depends on those plants for food?
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An energy pyramid shows 2,000 J at the producer level. A student calculates that the tertiary consumers should have 800 J. This is why the student's calculation is incorrect.
What is only about 10% of the energy is transferred to the next trophic level, so the amount decreases as you move upward? 2 J
A food web contains plants → aphids → ladybugs. If the plant population suddenly decreases, this is the most likely effect on the aphid population.
What is the aphid population would decrease because less food and energy are available?
A student observes a grass plant, a rabbit, and a mushroom in the same ecosystem. The student says:“All three organisms are consumers because all three need energy to live.”
What evidence would BEST prove that the student's classification is incorrect?
What is the grass gets energy and matter from the nonliving environment by capturing sunlight and manufacturing its own food, while the rabbit gets energy and matter from another organism and the mushroom breaks down dead organisms?
This type change that occurs naturally in an ecosystem and can include wildfires, droughts, floods, and hurricanes.
What is a natural disturbance?
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