Ecological Pyramids
Biology ⇒ Ecology and Environment
Ecological Pyramids starts at 8 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Ecological Pyramids.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 9
A food chain has four trophic levels. If the energy at the producer level is 5000 kJ, how much energy is available at the top level, assuming 10% transfer at each level?
Describe how the pyramid of numbers would look in a grassland ecosystem.
Describe one limitation of the pyramid of numbers.
Describe one way in which ecological pyramids help in ecosystem management.
Describe the main difference between a pyramid of numbers and a pyramid of biomass.
Explain why food chains rarely have more than four or five trophic levels.
Explain why the pyramid of energy can never be inverted.
Explain why the pyramid of energy is always upright.
Explain why the pyramid of numbers may be inverted in a tree ecosystem.
If 10,000 kJ of energy is available at the producer level, how much energy would be available to the secondary consumers, assuming 10% energy transfer at each level?
If a pyramid of energy shows 1000 kJ at the producer level, how much energy would be available at the tertiary consumer level, assuming 10% transfer at each level and three transfers?
If a pyramid of numbers is inverted, what does this indicate about the ecosystem?
A grassland ecosystem has the following biomass at each trophic level: Producers – 2000 kg, Primary consumers – 400 kg, Secondary consumers – 80 kg, Tertiary consumers – 16 kg. Calculate the percentage decrease in biomass at each trophic level and explain what this indicates about energy transfer in ecosystems.
A marine ecosystem has a small biomass of phytoplankton supporting a much larger biomass of zooplankton. What does this suggest about the rate of reproduction and turnover of phytoplankton in this ecosystem?
Consider an ecosystem where the pyramid of biomass is inverted. Explain the ecological reason behind this inversion and provide an example of such an ecosystem.
Explain how the concept of ecological pyramids can be used to predict the impact of removing a large number of primary consumers from an ecosystem.
