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प्रश्न
Distinguish between upright and inverted pyramids.
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उत्तर
| Sr. No. | Upright pyramid | Inverted pyramid |
| 1. | In an upright pyramid (e.g., a grassland and cropland ecosystem), biomass, the number of organisms, or the amount of energy decreases as the organism moves to upper trophic levels. | In an inverted pyramid (e.g., a tree ecosystem), these quantities tend to increase as one moves to successive trophic levels. |
| 2. | In an upright pyramid, the producers are more in number than the herbivores. | In the inverted pyramid, the number of producers is less, and the number of consumers is more than the number of producers. |
| 3. | The pyramid of energy is always upright. | The pyramid of numbers and the pyramid of biomass can be inverted. |
| 4. | The base bar, which includes producers, is the largest, while the bar at the vertex of the pyramid, which includes top consumers, is the smallest. | The base bar for producers is the smallest, while the vertex bar for top consumers is the highest. |
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संबंधित प्रश्न
Why the pyramid of energy is always upright? Explain.
In a food chain, the herbivores are represented by
(A) producers
(B) primary consumers
(C) secondary consumers
(D) decomposers
Explain energy pyramid
“The pyramid of biomass is not always upright.” Explain the statement.
Answer the following question.
Write any two limitations of ecological pyramids.
Give an example of an ecosystem that shows an inverted pyramid of numbers.
Give an example of an ecosystem that shows an inverted pyramid of biomass.
Distinguish between the upright and inverted pyramid of biomass.
Which ecosystem has the maximum biomass?
In a tree ecosystem the pyramid of numbers is:
Which one of the following is not used for construction of ecological pyramids?
In a pyramid of biomass, if the total dry weight (kgm-2) of primary produces is about 809, it well increases at tertiary consumer level up to ______.
Pyramid of biomass in terrestrial ecosystem shows sharp decline in
In an aquatic ecosystem, a mollusc typically belongs to-
Which of the following statements is not correct?
Name any two organisms which can occupy more than one trophic level in an ecosystem.
Organisms at a higher trophic level have less energy available. Comment.
What are the shortcomings of ecological pyramids in the study of ecosystems?
Write a short note on pyramid of numbers and pyramid of biomass.
(a) Draw a pyramid of numbers where a large number of insects are feeding on the leaves of a tree. What is the shape of this pyramid?
(b) Will the pyramid of energy be also of the same shape in this situation? Give a reason for your response.
The biomass of a standing crop of phytoplankton is 4 kg/m2, which supports a large standing crop of zooplankton having a biomass of 11 kg/m2. This is consumed by small fishes having a biomass of 25 kg/m2, which are then consumed by large fishes with a biomass of 37 kg/m2.
Draw an ecological pyramid indicating the biomass at each stage and also name the trophic levels. Mention whether it is an upright or inverted pyramid.
Give a scientific reason:
The pyramid of energy is always upright.
| In a forest ecosystem, a large population of insect feeds upon a banyan tree. Several small birds feed upon these insects. The small birds are fed upon by big-sized birds. |
- With respect to this ecosystem, draw a pyramid for each biomass and a pyramid of number.
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If 20,000 Kcal energy is available at the level of insects, calculate the amount of energy available at the level of big-sized birds.
