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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
Give diagrammatic representation of pyramid of numbers.
“It is often said that the pyramid of energy is always upright. On the other hand, the pyramid of biomass can be both upright and inverted.” Explain with the help if examples and sketches.
In an ecosystem dominated by trees, the pyramid (of numbers) is ______ type.
Describe with examples of pyramids of number and biomass.
In a food chain, the herbivores are represented by
(A) producers
(B) primary consumers
(C) secondary consumers
(D) decomposers
Which organisms constitute the last trophic level?
With reference to the levels of an organisation, differentiate between living organisms and non-living objects.
'The pyramid of energy is always upright.' Explain
Secondary consumers are __________.
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.
Define ecological pyramids.
Which ecosystem has the maximum biomass?
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?
Which of the following organism form the decomposers?
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
What does the base tier of the ecological pyramid represent?
What are the three types of ecological pyramids? What information is conveyed by each pyramid with regard to structure, function and energy in the ecosystem?
(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.
A graphic representation of the biomass relationship between the producer and consumer in an ecosystem is called ______.
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.
