How much energy is needed at the plankton level if the human needs 60 kcal of energy?
Phytoplankton needs to start with__kcal of energy.
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On average, only about 10 percent of energy stored as biomass in a trophic level is passed from one level to the next. This is known as “the 10 percent rule” and it limits the number of trophic levels an ecosystem can support
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