Question

How is the net primary productivity of an ecosystem derived 2?

Answer 1

Net primary production is the rate at which all the plants in an ecosystem produce net useful chemical energy; it is equal to the difference between the rate at which the plants in an ecosystem produce useful chemical energy (GPP) and the rate at which they use some of that energy during respiration.

Answer 2

• It is the amount of organic matter stored by producers per unit time and per unit area.
• It is equal to organic matter synthesized by photosynthesis minus utilization in respiration and other losses.
• It depends upon gross primary productivity as well as amount of consumption of photosynthesis.
• NPP is equal to GPP-R, where R is energy used in respiration$.$