Question

In a food chain, 10,000 joules of energy is available to the producer. How much energy will be available to the primary consumers
​

Answer 1

Required Answer:-

According to law of entropy or 10% law based on the second law of thermodynamics, about 10% of energy is transferred from one trophic level to next one in a food chain.

We have:-

• Energy available for producers = 10000 J

Primary consumers are the herbivores which constitutes the second trophic level in a food chain. As per the law, Only 10% of the energy will be available for them$.$

Energy available for PC:

= 10% of 10000 J

= 10/100 × 10000 J

= 1000 J

Hence, Energy available for the 1st order consumers or the primary consumers is 1000 Joules (Answer).

Answer 2

Answer:

Required Answer:-

It is given that total energy available to producer is 10,000 Joule.

Now,

According to second law of thermodynamics about 10% of energy is transferred from one level to another.

Therefore

Energy for primary consumer = 10% of 10000

$\sf \implies energy \: for \: pc = \dfrac{10}{100} \times 10000$

$\sf \implies \: energy \: = 1000 J$

Hence

Energy available for Primary consumer is 1000 Joule energy .

Consumer :-

Those living organisms that cannot make their own food are called consumer.