Primary Productivity
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Gross Productivity (GP) – total gain in energy or biomass per unit time. PowerPoint PPT Presentation


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Primary Productivity – the production of energy by autotrophs , usually measured as biomass per unit time. Secondary Productivity – the biomass gained by heterotrophs as they feed. Usually measured as biomass per unit time.

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Gross Productivity (GP) – total gain in energy or biomass per unit time.

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Gross productivity gp total gain in energy or biomass per unit time

Primary Productivity – the production of energy by autotrophs, usually measured as biomass per unit time.

Secondary Productivity – the biomass gained by heterotrophs as they feed. Usually measured as biomass per unit time.


Gross productivity gp total gain in energy or biomass per unit time

Gross Productivity (GP) – total gain in energy or biomass per unit time.

Gross Primary Productivity (GPP) – gained through photosynthesis by producers.

Gross Secondary Productivity (GSP) – gained through absorption by consumers.


Gross productivity gp total gain in energy or biomass per unit time

Net Productivity (NP) – the gain in energy or biomass remaining after the deduction of losses from respiration (R). This is the biomass available to subsequent consumers.

Net Primary Productivity (NPP) – the gain by producers in energy or biomass minus respiratory losses (R).

Net Secondary Productivity (NSP) – the gain in energy or biomass by consumers minus respiratory losses (R).


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