2020 EcosystemProductivity Easy Question 5 of 11 in Productivity

In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

A Gross primary productivity is always more than net primary productivity.
B Gross primary productivity and Net primary productivity are one and same.
C There is no relationship between Gross primary productivity and Net primary productivity.
D Gross primary productivity is always less than net primary productivity.

The answer is A.

Solution

Gross primary productivity (GPP) is the rate of production of organic matter during photosynthesis. Net primary productivity: NPP = GPP – R (respiration losses) So GPP is always more than NPP.

Concept GPP and NPP

Productivity in past papers

11 questions from this chapter have appeared across 11 exam years.