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Question
The productivity that accumulates as biomass is:
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Solution
The correct option is B Net primary productivity
To make calculations of biomass and energy balance in ecosystems, productivity is divided into two main types - Net primary productivity (NPP) and gross primary productivity (GPP).
GPP is the rate at which energy is captured or organic matter is synthesised by the producers per unit time and area.
NPP is the measure of the remaining energy or biomass stored by the producers after meeting their cost of respiration and maintenance. This is the energy that is available for the consumers.
This relationship between NPP and GPP can be simplified by the following equation: NPP = GPP – R (R = respiration and other losses). Thus the productivity that accumulates as biomass is, what remains after respiratory losses, that is NPP.
To make calculations of biomass and energy balance in ecosystems, productivity is divided into two main types - Net primary productivity (NPP) and gross primary productivity (GPP).
GPP is the rate at which energy is captured or organic matter is synthesised by the producers per unit time and area.
NPP is the measure of the remaining energy or biomass stored by the producers after meeting their cost of respiration and maintenance. This is the energy that is available for the consumers.
This relationship between NPP and GPP can be simplified by the following equation: NPP = GPP – R (R = respiration and other losses). Thus the productivity that accumulates as biomass is, what remains after respiratory losses, that is NPP.
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