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Question
Write the relationship between productivity, gross primary productivity, net primary productivity, and secondary productivity.
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Solution
Productivity: It is the rate of production of biomass at any trophic level at any given interval of time.
Gross productivity: It is the rate of production of organic matter by green plants per unit time per unit area. In other words, it is the total amount of productivity.
Net primary productivity: It is the difference between gross primary productivity and the loss due to respiration. Net primary productivity is the difference between gross primary productivity and respiratory loss.
NPP = GPP - R
Secondary productivity is the rate of formation of organic matter by consumers.
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| Carnivores | 420 | 378 |
| Herbivores | 4490 | 4041 |
| Producers | 45000 | 40,367 |
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