Thank you for reporting, we will resolve it shortly
Q.
If $10$ joules of energy is available at the producer level, then amount of energy present at the level of secondary consumers is
Ecosystem
Solution:
Only $10\,%$ of energy is transferred from one trophic level to the next trophic level of a food chain (ten percent law, given by Lindeman). In present case, energy available at producer level is $10\, J$. Hence energy at primary consumer level would be $1 \,J (10\%$ of $10\, J$). Similarly, at secondary consumer level, energy present will be $0.1 \,J (10\%$ of $1 J$).