A diagram that represents the number of organisms at each trophic level is called what?

A diagram that represents the number of organisms at each trophic level is called what?

• A. Energy Pyramid
• B. Biomass Pyramid
• C. Population Pyramid
• D. Pyramid of Numbers

Answer: (D)

Think about how many individual organisms occupy each level in a food chain. This is shown by the pyramid of numbers, where the width of each level represents how many organisms are present at that trophic level. Typically there are many producers at the base and fewer organisms as you move up to the top levels, so the diagram often narrows upward. Other pyramids illustrate different ideas: an energy pyramid shows the flow of energy through levels, a biomass pyramid shows the total dry mass at each level (which can sometimes be inverted if turnover is fast), and a population pyramid describes the age structure of a population rather than trophic levels.

Think about how many individual organisms occupy each level in a food chain. This is shown by the pyramid of numbers, where the width of each level represents how many organisms are present at that trophic level. Typically there are many producers at the base and fewer organisms as you move up to the top levels, so the diagram often narrows upward. Other pyramids illustrate different ideas: an energy pyramid shows the flow of energy through levels, a biomass pyramid shows the total dry mass at each level (which can sometimes be inverted if turnover is fast), and a population pyramid describes the age structure of a population rather than trophic levels.