Which of the following limits the number...

Which of the following limits the number of trophic levels in a food chain ?

Decrease in energy at higher trophic levels

Defficient food supply

Polluted air

Water

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Decrease in energy at higher trophic levels limits the number of trophic levels in a food chain. At each trophic level, a large portion of energy is utilised for the maintenance of organisms that occur at that trophic level.
So, organism at higher level gets less and less energy at successive levels. The number of trophic levels are limited to 3-4 because after that, the energy available for the next level will be too small i.e., it will be insufficient to sustain life of the organisms.

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In a stable ecosystem, which of the following limits the number of trophic levels ?

Biomass

The number of nutrients

Availability of nutrients

Presence of contaminants that increase in concentration along the food chain

Why is the number of trophic levels limited in a food chain ?

Because there is increase in energy at each level.

Because there is succesive decrease in energy at higher trophic levels.

Because trophic levels are connected

Because producers constitute first trophic level.

In a stable ecosystem, which of the following limits the number of trophic levels