The available biomass after respiration of producers and other plant losses is __________.

Step-by-step solution

Gross primary productivity (GPP) of an ecosystem is the rate of production of organic matter during photosynthesis. A considerable amount of GPP is utilised by plants in respiration. Gross primary productivity minus respiration losses (R), is the net primary productivity (NPP). NPP = GPP - R Net primary productivity is the available biomass for the consumption to heterotrophs (herbivores and decomposers). Answer: Net primary productivity