Question

What is the remainder of Gross Primary Production (GPP) called after plants utilize a portion for maintenance (respiratory energy loss)?

• A. Secondary Production
• B. Net Primary Production (NPP)
• C. Tertiary Production
• D. Gross Productivity

Answer 1

Answer:

B. Net Primary Production (NPP)

• The amount of organic matter or biomass produced by an individual organism, population, community or ecosystem during a given period of time is called - Productivity

• The total amount of solar energy converted (fixed) into chemical energy by green plants is called Gross Primary Production (GPP)

• A certain portion of gross primary production is utilised by plants for maintenance (largely respiratory energy loss) and the remainder is called - Net Primary Production (NPP) (which appears as new plant biomass)