energy Pyramid
The energy pyramid is showing the amount of energy that is available for each organism from the first source of energy. 100% of energy is available in the first source, but only 0.1% of energy is available for the highest trophic level of the pyramid. 90% of the grain and seed's energy is lost to the mouse and 90% of the mouse's energy is lost to the gray wolf because ATP is used to fuel countless life processes. The results of the ATP fueling so many life processes is, even though a lot of energy may be taken in at any level, the energy that ends up being stored there, which is the food available to the next level, is far less.