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.
What is primary productivity?
Why does primary productivity vary in different types of ecosystems?
State the relation between gross and net primary productivity.
What is the primary productivity of an ecosystem and how is it expressed?
Answer the following question.
Describe the inter-relationship between productivity, gross primary productivity, and net productivity.
Write the relationship between productivity, gross primary productivity, net primary productivity, and secondary productivity.
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?
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?
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?
What is the relationship between Gross Primary Productivity (GPP) and Net Primary Productivity (NPP)?
Which organismal category is responsible for producing primary productivity in ecosystems?
Which type of productivity involves the transfer and assimilation of organic matter across consumer trophic levels?
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?
Which human activity indirectly reduces ecosystem productivity?
