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प्रश्न
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”.
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उत्तर
Rate of production of organic matter in an ecosystem is called Gross Primary Productivity (GPP). When we subtract the respiratory losses (R) from GPP, we get Net Primary Productivity (NPP).
Nature provides various biotic and abiotic factors to enhance the rate of Gross Primary Productivity. Hence, it can be said that nature tends to increase the gross primary productivity.
But human beings need to make optimum utilization of the biomass produced. This is achieved in various ways; like harvesting the crop at the right time and plucking the fruits at the right time. If fruits will be left on the tree for a longer time, it will result in higher respiratory losses. A higher respiratory loss will reduce NPP. By plucking the fruits at the right time, man tries to increase the net primary productivity.
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संबंधित प्रश्न
Distinguish between primary and secondary productivity.
What is primary productivity?
Why does primary productivity vary in different types of ecosystems?
What is the primary productivity of an ecosystem and how is it expressed?
Explain what does the equation given below show:
NPP = GPP – R
The biomes energy available for consumption by herbivores is called ______.
How much of the net primary productively of a terrestrial ecosystem is eaten and digested by herbivores?
In the equation GPP − R = NPP R represents ______
Primary productivity varies from ecosystem to ecosystem. Explain?
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.
Which of the following is the unit of productivity of an Ecosystem?
Primary productivity in an ecosystem refers to the rate of generation of ______.
What is the relationship between Gross Primary Productivity (GPP) and Net Primary Productivity (NPP)?
In which standard units is productivity measured in terms of mass?
Which organismal category is responsible for producing primary productivity in ecosystems?
Which nutrient is essential for enzyme synthesis and chlorophyll production in plants?
How does plant species composition affect ecosystem productivity?
Which of the following correctly represents the energy flow in an ecosystem based on productivity concepts?
