Question

What is the relation between Gross primary productivity and Net primary productivity ?

Answer 1

Gross Primary Productivity vs. Net Primary Productivity. GPP stands for gross primary productivity while NPP stands for net primary productivity.GPP is the total amount of energy produced in the process, whereas NPP is the total difference between GPPand the energy used by the producer for respiration

Answer 2

Gross primary productivity

• It is the amount of organic matter synthesized by producers per unit time per unit area.
• It is equal to rate increase in body weight of producers plus loss suffered through respiration and damages.
• It depends upon photosynthetic efficiency of producers, availability of solar energy as well as inorganic nutrients$.$

Net primary productivity

• 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$.$