In an energy pyramid, the amount of biomass decreases as we move up through the pyramid because energy is lost at each level of the pyramid.
Energy pyramids are diagrams that show the flow of energy through an ecosystem, with producers at the bottom, followed by primary consumers, secondary consumers, and so on.
The energy that is available at each level of the pyramid is called "available energy," and it is the energy that is available to be used by the organisms at that level. As we move up the pyramid, the amount of available energy decreases because some of the energy is lost as heat during the process of metabolism.
At the bottom of the pyramid, producers (such as plants) use sunlight to convert energy from the sun into chemical energy through photosynthesis. This energy is then transferred to primary consumers (such as herbivores) when they eat the plants.
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