This image represents the 10 % rule. What is the 10% rule?

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10 % of the energy in a system is lost to the environment
10% of all organisms are able to reproduce in each ecosystem
10% of energy in the previous trophic level is available to the next trophic level.
10% of all organisms in each trophic level will survive.

The 10% rule refers to the idea that in an ecosystem, only about 10% of the energy from one trophic level is passed on to the next trophic level. The rest of the energy is lost as heat or used for metabolic processes. This concept helps to explain energy flow and the efficiency of energy transfer in ecosystems.

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10% of energy in the previous trophic level is available to the next trophic level.