The rate of biomass production is called productivity . They are of two types : Gross primary productivity and Net primary productivity . How these two productivities are related ?

Explanation

To understand the relationship between Gross Primary Productivity (GPP) and Net Primary Productivity (NPP), we can break it down into the following steps:

### Step 1: Define Gross Primary Productivity (GPP)
Gross Primary Productivity (GPP) is defined as the total rate of biomass production by photosynthetic organisms in an ecosystem. It represents the total amount of organic matter produced through photosynthesis.

### Step 2: Define Net Primary Productivity (NPP)
Net Primary Productivity (NPP) is the rate of biomass production that remains after accounting for the energy used by the producers for respiration. It represents the actual amount of organic matter available for consumption by herbivores and decomposers.

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