4.7 - Energy efficiency

Out of 100% of energy only 10% makes it to the next trophic level (primary consumer)
And only 1% of that makes it to the secondary consumer

The loss of energy is because the organism needs to:
-Respire
-Grow
-Move
Another reason for the lost of energy is that, for example:cellulose, cannot be digested so the energy is lost through faeces.