The measures of net primary production (NPP)and net ecosystem production (NEP)both can be used to quantify gross primary production (GPP).Which of the following most correctly explains a difference between these two measures?
A)NPP measures GPP minus the energy used by all heterotrophs.
B)NEP measures GPP minus the energy used by all autotrophs.
C)NPP measures GPP minus the energy used by primary producers.
D)NEP measures GPP minus the energy used by primary consumers.
E)NPP measures GPP minus the energy used by all detritivores.

Question

Quizplus · Accepted Answer

NPP (Net Primary Production) is calculated by subtracting the energy used by primary producers (autotrophs) for respiration from the GPP (Gross Primary Production). This reflects the energy that is available for growth and reproduction of primary producers.

The Measures of Net Primary Production (NPP)and Net Ecosystem Production