Ecological Pyramids
Biology ⇒ Ecology and Environment
Ecological Pyramids starts at 8 and continues till grade 12.
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See sample questions for grade 8
Describe one reason why a pyramid of numbers might be inverted in a forest ecosystem.
Describe the difference between a pyramid of numbers and a pyramid of biomass.
Describe what would happen to the shape of an ecological pyramid if a large number of primary consumers were removed from an ecosystem.
Explain why energy transfer between trophic levels is inefficient.
Explain why higher trophic levels have fewer organisms than lower trophic levels.
Explain why the pyramid of biomass can be inverted in aquatic ecosystems.
Explain why the pyramid of energy is always upright.
If 10,000 J of energy is available at the producer level, how much energy would typically be available to the primary consumers?
If a grassland ecosystem has 1000 kg of grass, 100 kg of grasshoppers, and 10 kg of frogs, what is the shape of the pyramid of biomass?
If a pyramid of numbers in a grassland ecosystem has 5000 grasses, 500 grasshoppers, 50 frogs, and 5 snakes, what is the shape of the pyramid?
What does the pyramid of numbers show in an ecosystem?
What is an ecological pyramid?
What is the main reason for the loss of energy at each trophic level?
Which pyramid is most useful for comparing the functional roles of organisms in an ecosystem?
Which type of ecological pyramid best shows the flow of energy in an ecosystem?
A grassland ecosystem has the following data: 2000 kg of grass, 200 kg of rabbits, 20 kg of snakes, and 2 kg of hawks. Calculate the percentage of biomass transferred from the grass to the rabbits.
Describe how the introduction of an invasive species at the primary consumer level could affect the structure of an ecological pyramid.
Explain why the pyramid of energy is considered a more accurate representation of ecosystem structure than the pyramid of biomass or numbers.
If only 1% of the energy from sunlight is captured by producers, and 10% of that energy is transferred to primary consumers, what percentage of the original sunlight energy is available to secondary consumers?
In a marine ecosystem, the biomass of phytoplankton is less than that of zooplankton, but the energy pyramid is still upright. Explain this observation.
