Advertisements
Advertisements
प्रश्न
Explain why a progressive decline is seen in the population size from the first to the fourth trophic level in the above pyramid.
उत्तर
In the above example, the primary producers can support less number of primary consumers, which in turn support lesser number of secondary and tertiary consumers. In a food chain, as the size of an organism at any trophic level increases, its number decreases. This happens because according to the 10% law, only 10% of the energy is transferred from one trophic level to the next. So in order to sustain life, the number of organisms keeps decreasing at each trophic level. Thus, there is a progressive decline in the population size from the first to the fourth trophic level in the above pyramid.
APPEARS IN
संबंधित प्रश्न
Correct and rewrite the following statement and justify your correction.
Plants in an ecosystem are called primary consumers.
State the law which governs the energy flow in an ecosystem.
What do you understand by the term hydroelectric power?
Consider the amount of organic matter at the different trophic levels in an ecosystem given below:
| Trophic Level | Amount of organic matter (in Kg) |
| Tertiary consumers | 250 |
| Primary consumers | 150 |
| Primary producers | 100 |
| Secondary Consumers | 200 |
On the basis of the data provided above, construct an ecological pyramid. Comment upon its nature giving at least one example of the type of organism occupying each of the above mentioned trophic levels.
Which of the statement is incorrect?
A wolf has just eaten a lamb. When tiger saw the wolf, it attacked on the wolf. The tiger in ecological terms is
Read the following statements and select the correct ones:
- A given species may occupy more than one trophic level in the same ecosystem at the same time
- Productivity of an aquatic ecosystem is less than that of a terrestrial ecosystem
- Producers constitute of the first trophic level of a detritus food chain
“The energy flow in the ecosystem follows the second law of thermodynamics.” Explain.
What will happen to an ecosystem if all top carnivore population is removed?
Study the food chain given below and answer the question that follows:
Is it possible to have 2 more trophic levels in this food chain just before the fourth trophic level? Justify your answer.
