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  • What is meant by trophic level in a food chain ? Construct a terrestrial food chain with four trophic levels. The energy flow in a food chain is always unidirectional. Why?     <div

What is meant by trophic level in a food chain ? Construct a terrestrial food chain with four trophic levels. The energy flow in a food chain is always unidirectional. Why?

 

 
 
 
 
 

Answers (1)

The number of steps of the food chain of each organism from the start to the end is termed as a trophic level.

The terrestrial food chain of four trophic levels: 

  1. grass (producer)
  2. mouse (primary consumer)
  3. snake (secondary consumer)
  4. hawk (tertiary consumer).

Once energy is consumed then it can not be returned to the previous one like energy released from the sun can not be returned by any living organism. Same in the food chain, the energy moves progressively through various trophic levels. It will be no longer available to the previous trophic level. That's why the flow of energy in a food chain is unidirectional.

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Safeer PP

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