Question

which of the following best describes the net primary productivity of an ecosystem? a net primary productivity is the amount of energy captured by producers through photosynthesis over time. b net primary productivity is the amount of energy lost by producers through respiration over time. c net primary productivity is the amount of energy lost through respiration by producers subtracted from the gross primary productivity of an ecosystem. d net primary productivity is the amount of energy lost through respiration by producers added to the gross primary productivity of an ecosystem.

Explanation:

Net primary productivity (NPP) is calculated as gross primary productivity (GPP) minus the energy used by producers for respiration. GPP is the total energy captured by producers through photosynthesis. NPP represents the energy available for growth and reproduction of producers and for transfer to higher - trophic levels.

Answer:

C. Net primary productivity is the amount of energy lost through respiration by producers subtracted from the gross primary productivity of an ecosystem