In a typical food pyramid, energy transfer between trophic levels typically follows the 10% rule, meaning that only about 10% of the energy from one level is passed on to the next.
If the producers have 100,000 kJ of energy available, then the energy available to the primary consumers (herbivores) would be approximately:
\[ 100,000 , \text{kJ} \times 0.10 = 10,000 , \text{kJ} \]
Then, the energy available to the secondary consumers (carnivores that eat primary consumers) would again be about 10% of the energy available to the primary consumers:
\[ 10,000 , \text{kJ} \times 0.10 = 1,000 , \text{kJ} \]
Therefore, the energy available to the secondary consumers is 1,000 kJ.