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प्रश्न
What are the shortcomings of ecological pyramids in the study of ecosystem?
उत्तर
The ecological pyramid assumes a simple food chain and does not accommodate food webs. Thereby, it does not take into account the fact that species may belong to two or more trophic levels at a time. Also saprophytes despite their vital role in ecosystem are given no place in the ecological pyramids.
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संबंधित प्रश्न
Distinguish between food chain and food web.
Explain energy pyramid
Answer the following question.
What is an ecological pyramid? Compare the pyramids of energy, biomass, and numbers.
Give an example of an ecosystem that shows an inverted pyramid of numbers.
In a tree ecosystem the pyramid of numbers is:
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 ______.
Organisms at a higher trophic level have less energy available. Comment.
Write a short note on pyramid of numbers and pyramid of biomass.
Describe pyramid of energy with the help of diagram.
| 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.
