Net primary productivity is
A) measured in tons per day.
B) measured in pounds per ton.
C) measured in grams of fixed carbon per square meter per year.
D) estimated based on plant sizes.

Question

Quizplus · Accepted Answer

Net primary productivity (NPP) is the rate at which plants and other photosynthetic organisms produce organic matter through photosynthesis, minus the rate at which they use some of that organic matter through cellular respiration. It is typically measured in grams of fixed carbon (or biomass) per square meter per year, as this reflects the total amount of carbon that is being captured and stored by primary producers in an ecosystem. Choices A, B, and D are all incorrect, as they do not reflect how NPP is actually measured or estimated.

Net Primary Productivity Is