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NEETBotanyEcosystem

In a grassland ecosystem, the grasses synthesize organic matter through photosynthesis and utilize a portion of it for their own metabolism. The remaining biomass is then consumed by a rabbit, which uses it to synthesize new organic matter for its own body. Which of the following pairs of terms correctly identifies the remaining biomass in the grasses and the rate of formation of new organic matter by the rabbit, res

Options

  1. AGross primary productivity and Secondary productivity
  2. BSecondary productivity and Net primary productivity
  3. CNet primary productivity and Secondary productivity
  4. DNet primary productivity and Gross primary productivity

Correct answer

C. Net primary productivity and Secondary productivity

Step-by-step solution

The total organic matter synthesized by the grasses is the Gross Primary Productivity (GPP). The portion utilized for their own metabolism is respiration loss (R). The remaining biomass ( GPP - R ) is the Net Primary Productivity (NPP), which is available to the next trophic level. When the rabbit (a consumer) eats the grasses and forms new organic matter, this rate of formation of new organic matter by consumers is defined as Secondary productivity. Answer: Net primary productivity and Secondary productivity

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