A measure of the amount of energy or biomass transferred from one trophic level to the next higher one.
- The % is always under 100% because organisms use most of the energy for life functions (~ 10% passed on)
- Biomass decreases from one trophic level to the next because:
- - Not all of the lower organism is eaten
- -Not everything eaten is digested (Waste)
- - Energy is lost as heat
- The loss of energy is why there is usually less carnivores than herbivores and herbivores than plants