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प्रश्न
What is primary productivity?
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उत्तर
A plant’s primary productivity is the amount of biomass or organic matter produced per unit area over a given time period during photosynthesis. It is expressed in terms of weight (g/m2/yr) or energy (kcal/m2/yr). It is classified into two types: gross primary productivity and net primary productivity. The rate at which organic matter is produced during photosynthesis is known as an ecosystem’s gross primary productivity. Net primary productivity (NPP) is calculated by subtracting respiration losses (R) from gross primary productivity.
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संबंधित प्रश्न
Write the equation that helps in deriving the net primary productivity of an ecosystem.
Distinguish between primary and secondary productivity.
Why does primary productivity vary in different types of ecosystems?
Explain what does the equation given below show:
NPP = GPP – R
Answer the following question.
Describe the inter-relationship between productivity, gross primary productivity, and net 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?
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”.
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.
The primary productivity in an ecosystem is expressed as ______.
- gm-2 yr-1
- gm-2 yr
- Kcal m-2 yr-1
- Kcal m-2
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?
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?
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 of the following is a limiting factor for productivity in terrestrial ecosystems?
Which nutrient is essential for enzyme synthesis and chlorophyll production in plants?
How does plant species composition affect 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?
