Advertisements
Advertisements
प्रश्न
Distinguish between primary and secondary productivity.
Advertisements
उत्तर
| Sr. No. | Primary productivity | Secondary productivity |
| 1. | The rate at which producers convert energy from photosynthesis and chemosynthesis into organic compounds is called primary productivity. It is measured per unit time and area. | When the rate of energy accumulation is measured at the consumer level, it is called secondary productivity. |
| 2. | It can be divided into gross and net primary productivity. | This productivity is not divided into gross and net. |
| 3. | In comparison, it is quite high. | It is comparatively small. |
| 4. | It is caused by the synthesis of new organic matter from inorganic raw materials. | It is caused by the synthesis of organic material from organic matter. |
APPEARS IN
संबंधित प्रश्न
Write the equation that helps in deriving the net primary productivity of an ecosystem.
Why does primary productivity vary in different types of ecosystems?
What is the primary productivity of an ecosystem and how is it expressed?
Write the relationship between productivity, gross primary productivity, net primary productivity, and secondary productivity.
Secondary productivity is rote of formation of new organic matter by ______.
The biomes energy available for consumption by herbivores is called ______.
Which one of the following ecosystem is most productive in term of net primary production?
How much of the net primary productively of a terrestrial ecosystem is eaten and digested by herbivores?
Which one of the following ecosystem has the highest annual net productivity?
If A = Gross primary productivity, B = Net primary productivity and C = Respiration losses, then what will be the correct relation between them?
In the equation GPP − R = NPP R represents ______
Productivity is the rate of production of biomass expressed in terms of ______.
Which of the following ecosystems is most productive in terms of net primary production?
Why are oceans least productive?
Why is the rate of assimilation of energy at the herbivore level called secondary productivity?
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.
Which of the following is the unit of productivity of an Ecosystem?
