why trophic level are three or four in numbers
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The different feeding positions in a food chainor web are called trophic levels. Generally, there are no more than four trophic levels because energy and biomass decrease from lower to higherlevels.
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The number of trophic levels are 3-4. Because the amount of energy flow decreases with successive trophic level, as only 10% of energy is transferred from one trophic level to the next trophic level. ... So, the food chain is generally limited to 3-4 trophic levels only.....
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