Gross primary productivity is the rate
A) at which producers manufacture chemical energy through photosynthesis.
B) at which producers use chemical energy through respiration.
C) at which producers manufacture chemical energy minus energy used through respiration.
D) at which chemical energy is transferred from one trophic level to the next.
E) at which consumers use chemical energy through respiration.

Question

Quizplus · Accepted Answer

Gross primary productivity (GPP) is the rate at which primary producers manufacture chemical energy through photosynthesis. This energy is then used for growth, maintenance of body tissues, and reproduction. GPP is the foundation of energy flow in an ecosystem and is the basis for all other trophic levels.

Gross Primary Productivity Is the Rate