What is the name of the type of pyramid that calculates the mass of all organisms at each trophic level?

The type of pyramid that calculates the mass of all organisms at each trophic level is called a biomass pyramid. This pyramid provides a visual representation of the total mass or biomass of living organisms present at each trophic level in an ecosystem.

In a biomass pyramid, the width of each level corresponds to the total biomass of the organisms in that trophic category, typically measured in grams or kilograms per unit area. This is crucial for understanding energy flow and ecological efficiency within food webs because it illustrates how much organic material is available to support higher trophic levels. The biomass decreases at higher trophic levels, which reflects the energy loss that occurs as energy is transferred through the food chain.

Biomass pyramids are specifically useful for assessing the health and sustainability of an ecosystem, as they highlight the amount of organic material available for primary consumers (herbivores) and higher-level consumers (carnivores and omnivores).