Which of the following relations is correct regarding GPP and NPP of an ecosystem ?

Options

A. NPP=GPP – Animal consumption
B. NPP=GPP + Plant respiration
C. NPP=GPP – Plant respiration
D. NPP=GPP + Animal consumption

Answer

C

Explanation

Gross primary productivity minus respiratory losses. It is the rate of organic matter build-up or stored by producers in excess of respiratory utilization per unit time and area NPP GPP −= R .