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Why is the length of a food chain in an ...

Why is the length of a food chain in an ecosystem generally limited to 3-4 trophic levels?

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As 90% energy is lost in the form of heat from one trophic level to another, residual energy decreases drastically within 2-3 trophic levels.
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OSWAAL PUBLICATION-ECOSYSTEM-TOPIC-2 : Energy Flow and Ecological Pyramids (Short Answer Type Questions-I)
  1. The number of trophic levels in an ecosystem is limited. Comment.

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  2. Flow of energy through various trophic levels in an ecosystem is unid...

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  3. Is it possible to achieve .zero population growth rate? If yes, what k...

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  4. Depict a simple grazing food chain.

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  5. Write a note on detritus food chain.

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  6. Cite an example of an inverted ecological pyramid. What kind of pyrami...

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  7. What are decomposers? Write their function.

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  8. Why is the length of a food chain in an ecosystem generally limited to...

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  9. Differentiate: detritus and grazing food chains.

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  10. What is food chain? Give an example.

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  11. "Flow of energy is unidirectional but nutrient flow is in a cycle" Giv...

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  12. Some organisms are called top carnivores. Why? Give some examples.

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  13. Give an example of an ecological pyramid which is always upright. Just...

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  14. What are the limitations of ecological pyramids?

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  15. State the difference between the first trophic levels of detritus food...

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  16. How are standing crop and biomass related to each other?

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  17. Differentiate between a detrivore and a decomposer giving an example o...

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  18. Why is measurement of bio-mass in terms of dry weight more accurate th...

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  19. How is a detritivore different from a decomposer? Give one example for...

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  20. Expand PAR. How much PAR is used in gross primary productivity?

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