Consider the following food chain :
Grass `to` Mice `to` Snakes `to` Peacocks
If in this chain, 100 J of energy is available at the producer level, then calculate the energy transferred to the peacocks as food. State the law used in the calculations.

Explanation

The producer level in this food chain is grass, so 100 J of energy is available in grass as food. We have now to apply 10 per cent law to the above food chain :
(i) According to ten per cent law, `10%` of the energy of grass will be available as food in mice. Thus, the energy available to mice will be `10%` of 100 J, which is 10 J.
(ii) The energy available to snakes will be `10%` fo 10 J which is 1 J.
(iii) And finally, the energy available to peacocks will be `10%` of 1 J, which id 0.1 J.
The above conclusions can now be depicted as follows :
`underset(100J)("Grass")overset(10%)(to)underset(10J)("Mice")overset(10%)(to)underset(1J) ("Snakes")overset(10%)(to)underset(0.1J) ("Peacocks")`