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(A) Gross primary productivity $(GPP)$ of an ecosystem is defined as the rate of production of organic matter during photosynthesis.Plants capture sol

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Gross primary productivity $(GPP)$

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(A) Gross primary productivity $(GPP)$ of an ecosystem is defined as the rate of production of organic matter during photosynthesis.Plants capture solar energy and convert it into chemical energy (organic matter) through the process of photosynthesis.$GPP$ represents the total amount of biomass produced by producers in a given area over a specific time period.Net primary productivity $(NPP)$ is the $GPP$ minus the respiration losses $(R)$ by plants,i.e.,$NPP = GPP - R$.

............. of an ecosystem is the rate of production of organic matter during photosynthesis.

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