Question

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What is the 10% rule?

The 10 percent rule states that when an organism/species is consumed by another organism/species of higher trophic level, the latter (discards, stores, transforms) only 10% of energy. The rest of the energy is lost during energy transfer, or transformed as (perspiration, waste, respiration), or lost to incomplete digestion by species of a higher trophic level.

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Answer 1

An ecologist, Raymond Lindeman, introduced the ten percent rule in 1942. It is not an exact rule but rather a rule of thumb. It states that that when an organism/species is consumed by another organism/species of higher trophic level, only ten percent of energy is stored by the higher trophic one. The rest of the energy is lost during energy transfer; or transformed as respiration; or lost due to incomplete digestion.

Answer 2

The 10% rule is - only 10 percent of the total energy stored as biomass in a trophic level is passed from one trophic level to the next trophic level.

The 10% Rule

• it states that when the lower trophic level organism is consumed by a higher trophic level organism
• in this process only 10% of total energy is passed in an ecosystem from the lower trophic level to the higher.
• rest 90% of the energy is lost during transfer, cellular functions such as respiration, or incomplete digestion.

Thus, The 10% rule is - only 10 percent of the total energy stored as biomass in a trophic level is passed from one trophic level to the next trophic level.

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