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NTA Abhyas NEET2020BotanyEcosystemPractice

What is Gross primary productivity (GPP)?

Options

  1. AIt refers to the environmental factors.
  2. BNumber of plants in an ecosystem.
  3. CIt is the rate of production of organic matter during photosynthesis.
  4. DSolar energy exposed to plants in an ecosystem.

Correct answer

C. It is the rate of production of organic matter during photosynthesis.

Step-by-step solution

Primary productivity is of two types: A. Gross primary productivity (GPP): It is the rate of production of organic matter during photosynthesis. B. Net primary productivity (NPP): It is the biomass available for the consumption of heterotrophs (herbivores and decomposers). A part of GPP is utilized by plants in respiration (R), whereas the remaining is available for the next trophic level. Hence, NPP = GPP - R

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