What is the difference between Gross Primary Productivity (GPP) and Net Primary Productivity (NPP)?

Gross Primary Productivity (GPP) is the total amount of energy that plants capture through photosynthesis, while Net Primary Productivity (NPP) is the amount of energy that plants store after accounting for the energy they use for their own growth and metabolism. In other Words, GPP is the total production of plants, while NPP is the amount of energy available for consumption by other organisms in the ecosystem.