Question

• What is food chain and food web?
• What are trophic levels?
• Why many trophic levels cannot be there in one food chain?​

Answer 1

Answer:

1. A food chain is a linear network of links in a food web starting from producer organisms and ending at apex predator species, detritivores, or decomposer species. A food chain also shows how the organisms are related with each other by the food they eat. Each level of a food chain represents a different trophic level.
2. In ecology, the trophic level is the position that an organism occupies in a food chain - what it eats, and what eats it. Wildlife biologists look at a natural "economy of energy" that ultimately rests upon solar energy.
3. Energy transfer efficiency limits food chain lengths
4. Energy is transferred between trophic levels when one organism eats another and gets the energy-rich molecules from its prey's body. However, these transfers are inefficient, and this inefficiency limits.

Explanation:

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Answer 2

${\underline{\sf{Question :-}}}}$

◉ What is food chain and food web?

${\underline{\sf{Answer :-}}}}$

➜ A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another organism.

Food webs consist of many interconnected food chains and are more realistic representation of consumption relationships in ecosystems.

${\underline{\sf{Question :-}}}}$

◉ What are trophic levels?

${\underline{\sf{Answer :-}}}}$

➜ The various steps in a food chain at which the transfer of food (or energy) takes place are called trophic levels.

Example : A food chain operating in a grassland: Grass → Insects → Frog → Birds.

${\underline{\sf{Question :-}}}}$

◉ Why many trophic levels cannot be there in one food chain?

${\underline{\sf{Answer :-}}}}$

➜ Food chains cannot go on forever because energy is lost at the various trophic levels.

The loss of energy at each step of food chain is so great that very little usable energy remains after four trophic levels. Hence, food chains generally consist of only three or four steps.

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