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Question

Rate of organic matter stored by producers in their bodies per unit time and area is called as:

A
GPP
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B
NPP
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C
Secondary productivity
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D
Ecological efficiency
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Solution

The correct option is B NPP
Amount of organic matter stored (after used up in respiration) by producers per unit time and per unit area is referred to as net primary productivity (NPP). It can be expressed as

NPP = GPP (Gross Primary Productivity) - R (Respiration Losses).

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