Q. Consider the following statements:
- Net Primary Productivity = Gross primary productivity + respiration losses.
- Net primary productivity is the available biomass for the consumption to heterotrophs.
Which of the above is / are correct?
Answer:
Both 1 and 2
Notes: Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis. A considerable amount of GPP is utilised by plants in respiration. Gross primary productivity minus respiration losses (R), is the net primary productivity (NPP). Net primary productivity is the available biomass for the consumption to heterotrophs (herbiviores and decomposers).