Question

In the equation

GPP – R = NPP

GPP is Gross Primary Productivity NPP is Net Primary Productivity R here is ______.

Options

• Respiratory quotient

• Respiratory loss

• Reproductive allocation

• Photosynthetically active radiation

Answer 1

In the equation

GPP – R = NPP

GPP is Gross Primary Productivity NPP is Net Primary Productivity R here is Respiratory loss.

Explanation:

Net primary productivity, or NPP, can be defined as the rate at which the autotrophs generate useful chemical energy for the consumption of heterotrophs. This energy is further used for the growth and reproduction of primary producers. GPP, or Gross Primary Productivity, is the rate of production of organic matter during the process of photosynthesis. Here, R stands for respiration loss in the equation GPP-R = NPP. R is the amount of carbon lost during respiration. When the carbon lost during respiration is subtracted from GPP, it gives us NPP.