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प्रश्न
Distinguish between primary and secondary productivity.
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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. |
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संबंधित प्रश्न
How are productivity, gross productivity, net primary productivity and secondary productivity interrelated ?
State the relation between gross and net primary productivity.
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 ______.
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?
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?
Justify the pitcher plant as a producer.
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”.
The primary productivity in an ecosystem is expressed as ______.
- gm-2 yr-1
- gm-2 yr
- Kcal m-2 yr-1
- Kcal m-2
Which of the following is the unit of productivity of an Ecosystem?
In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100x(kcal m−2) yr−1, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
What is the rate at which biomass is synthesised by a trophic level per unit area per unit time called?
Which of the following best describes Net Primary Productivity (NPP)?
In which standard units is productivity measured in terms of mass?
Which type of productivity involves the transfer and assimilation of organic matter across consumer trophic levels?
Which nutrient is essential for enzyme synthesis and chlorophyll production in plants?
How does plant species composition affect ecosystem productivity?
Which human activity indirectly reduces ecosystem productivity?
Why is CO₂ concentration considered a factor affecting productivity?
Which of the following correctly represents the energy flow in an ecosystem based on productivity concepts?
