Why do we not find food chains of more than four trophic levels in nature?
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Answer:
Because at fourth tropic level the energy of food in very very low .
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Answer: we do not find food chains with not more than four tropic levels because
Of the 10% law.FOR EXAMPLE.
Grass provides 500J of energy to rat but when it reaches to Hawke ,the top carnivore, it decreases to 5J
Grass-----> rat------> Snake-----> Hawke
500J. 50J. 5J
hence,after reaching Hawke sufficient energy will no be transferred to any other carnivore.That is why there are generally four tropic levels.
Hope you understand
And best of luck
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