primary productivity

Main Entry:  primary productivity
Part of Speech:  n
Definition:  a measure of the rate at which new organic matter is developed through photosynthesis and chemosynthesis in producer organisms based on the oxygen released and carbon taken in; the transformation of chemical or solar energy to biomass
Example:  Most primary productivity occurs through photosynthesis, where green plants convert solar energy, carbon dioxide, and water to glucose and eventually to plant tissue.'s 21st Century Lexicon
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