The rate at which an ecosystem's producers convert solar energy to chemical energy stored in biomass is called primary productivity.
The primary productivity in an ecosystem is the rate at which energy is accumulated by the photosynthetic and chemosynthetic activity of the ecosystem's producers in the form of an organic substance that can be used as a nutritive material.
Therefore, we can conclude that the rate at which an ecosystem's producers convert solar energy to chemical energy stored in biomass is called primary productivity.
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