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प्रश्न
“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.
उत्तर
Pyramid of energy is a graphical representation of amount of accumulated energy per unit area in different trophic levels of a food chain. An energy pyramid is always upright because there is a gradual decrease in energy at successive trophic levels. This happens according to the 10% law of energy transfer, where only 10% of the total energy is transferred from one trophic level to another. The energy is the highest at the producer level, and it gradually decreases on moving from herbivores to carnivores.
Pyramid of biomass is a graphic representation of biomass present per unit area in different trophic levels. It can be both upright and inverted. Examples: In a grassland forest ecosystem, there is a gradual decrease in biomass of organisms at successive trophic levels from producers to top carnivores which shows a straight or upright pyramid.
In a pond ecosystem, the pyramid is inverted as there is a gradual increase in biomass of organisms at successive trophic levels from producers to top carnivores. The producers are the smallest organisms, while the carnivores are larger in size.
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संबंधित प्रश्न
In a food chain, the herbivores are represented by
(A) producers
(B) primary consumers
(C) secondary consumers
(D) decomposers
“The pyramid of biomass is not always upright.” Explain the statement.
'The pyramid of energy is always upright.' Explain
Explain with the help of labelled diagrams, the difference between an upright pyramid of biomass and an inverted pyramid of biomass.
Secondary consumers are __________.
Give an example of an ecosystem that shows an inverted pyramid of biomass.
Which of the following statements is not correct?
(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 ______.
Describe pyramid of energy with the help of diagram.
