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प्रश्न
Describe pyramid of energy with the help of diagram.
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उत्तर
- A pyramid of energy is always upright. It can never be inverted because when energy flows from a particular trophic level, only 10% passes on as net energy to the next trophic level, and a large amount of energy is always lost as heat at each step.
- In smaller food chains, more energy is available than in the longer food chains.
- There are chain limitations of ecological pyramids. It assumes a simple food chain, something that almost never exists in nature.
- It does not accommodate a food web. Moreover, saprophytes are not given any place in ecological pyramids, even though they play a vital role in the ecosystem.
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संबंधित प्रश्न
Distinguish between a food chain and a food web.
With reference to the levels of an organisation, differentiate between living organisms and non-living objects.
Write any two limitations of ecological pyramids.
In a tree ecosystem the pyramid of numbers is:
Pyramid of energy in grassland and pond ecosystem is always ______.
Which of the following organism form the decomposers?
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 ______.
The number of trophic levels in an ecosystem are limited. Comment.
Draw a diagram of pyramid of energy.
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.
