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Trophic Level: Freshwater System

APBIO-NVG9B1

Within an ecosystem, only 10% of the energy available moves from one trophic level to the next. For example, if there are 100 units of energy available to the producers, there will only be 10 units of energy available for the next level, the primary consumers.

Which of the following explains why this is correct?

A

Energy is transferred or transformed. The energy gets transformed from chemical energy into mechanical or thermal energy (heat) to be used for essential functions.

B

Energy is recycled through the biosphere. The energy is recycled from chemical energy into mechanical or thermal energy (heat) to be used for essential functions.

C

Energy is transferred out into the atmosphere and not available to be used by living organisms.

D

Energy is recycled through the biosphere. The energy gets transformed from the water to be used for essential functions.