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प्रश्न
State the relation between gross and net primary productivity.
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उत्तर
The relation between the gross and net primary productivity can be shown as:
Pn = Pg − R
where,
Pn = Net primary productivity
Pg = Gross primary productivity
R = Respiration
संबंधित प्रश्न
How are productivity, gross productivity, net primary productivity and secondary productivity interrelated ?
Distinguish between primary and secondary productivity.
Explain what does the equation given below show:
NPP = GPP – R
Write the relationship between productivity, gross primary productivity, net primary productivity, and secondary productivity.
Which one of the following ecosystem has the highest annual net productivity?
Productivity is the rate of production of biomass expressed in terms of ______.
Primary productivity varies from ecosystem to ecosystem. Explain?
Justify the following statement in terms of ecosystem dynamics. “Nature tends to increase the gross primary productivity, while man tends to increase the net primary productivity”.
Which of the following ecosystems will be more productive in terms of primary productivity? Justify your answer. A young forest, a natural old forest, a shallow polluted lake, alpine meadow.
Use the information provided in the table given below to answer the following questions:
| Tropic level | Net Production(KJm-2y-1) | Respiration (KJm-2y-1) |
| Top Carnivore | 50 | 35 |
| Carnivores | 420 | 378 |
| Herbivores | 4490 | 4041 |
| Producers | 45000 | 40,367 |
- Calculate the gross primary productivity.
- Analyze the trend in the Net Production from Producers to Top Carnivore. Give a reason for your observation.
