Productivity

Gross Primary Productivity Rate of energy capture by plants (terrestrial) in photosynthesis

Gross Primary Productivity

Plant Respiration Recall that plants respire. This consumes some of the energy that they capture.

Plant Respiration

Net Primary Productivity Energy available to consumers

$$\text{NPP} = \text{GPP} - \text{Plant Respiration}$$ (3)

Net Primary Productivity

Comparative Net Primary Productivity by Ecosystem, World Average

Comparative Net Primary Productivity by Ecosystem, Per Unit Area

Human Appropriation of Net Primary Productivity

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