What measure is the total mass of organisms at a trophic level?

• Correct Answer: biomass
• phosphorus
• detritus
• atomic mass

Explanation: Biomass is the total mass of organisms at a trophic level. With less energy at higher trophic levels, there are usually fewer organisms as well. This is also represented in the pyramid in Figure above . Organisms tend to be larger in size at higher trophic levels. However, their smaller numbers result in less biomass.

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