In a biomass pyramid, what percentage of biomass is typically passed to the next higher trophic level?

In a biomass pyramid, it is generally observed that around 10% of the biomass is passed on to the next higher trophic level. This phenomenon is primarily due to the inefficiencies in energy transfer between levels, which is often referred to as the "10% rule" in ecology.

At each trophic level, organisms utilize a significant portion of the energy they acquire for their own metabolic processes, such as growth, reproduction, and maintaining bodily functions. A great deal of energy is lost as heat, and some energy is also not obtained by higher trophic levels because not all parts of organisms are consumed. Consequently, only about 10% of the energy available at one trophic level is converted into biomass and made available to the next level. This is why the structure of biomass pyramids typically reflects this limited energy transfer, highlighting the decreasing biomass and energy available as you move up the trophic levels.