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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.
Distinguish between a food chain and a food web.
Describe with examples of pyramids of number and biomass.
Explain energy pyramid
Answer the following question.
What is an ecological pyramid? Compare the pyramids of energy, biomass, and numbers.
Answer the following question.
Write any two limitations of ecological pyramids.
Explain with the help of labelled diagrams, the difference between an upright pyramid of biomass and an inverted pyramid of biomass.
Give an example of an ecosystem that shows an inverted pyramid of biomass.
Define ecological pyramids.
In a tree ecosystem the pyramid of numbers is:
Pyramid of energy in grassland and pond ecosystem is always ______.
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 ______.
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
Pyramid of biomass in terrestrial ecosystem shows sharp decline in
Which of the following statements is not correct?
Pyramid of numbers is ______.
What does the base tier of the ecological pyramid represent?
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.
The number of trophic levels in an ecosystem are limited. Comment.
Write a short note on pyramid of numbers and pyramid of biomass.
(a) Given below is a pyramid of biomass in an ecosystem where each bar represents the standing crop available in the trophic level. With the help of an example explain the conditions where this kind of pyramid is possible in nature.
(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.
