Why are food chains usually limited to 4-5 levels?

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Question

Why are food chains usually limited to 4-5 levels?

Accepted Answer

Energy is lost at each level (mainly as heat from respiration), so not enough remains to support further levels — Only about 10% of energy transfers between trophic levels. The rest is lost as heat (respiration), waste, and uneaten parts. By level 4-5, not enough energy remains.

Answer

Animals refuse to eat

Answer

Energy is lost at each level (mainly as heat from respiration), so not enough remains to support further levels

Answer

Predators are too rare

Answer

There aren't enough species

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