CBSE Class 12-science Answered
Which of the following Pyramids always shows a steeper vertical gradient i.e. UPWARD
1 PYRAMID OF NUMBER
2 PYRAMID OF NUTRIENTS
3 PYRAMID OF BBIOMASS
4 PYRAMID OF ENERGY
Asked by pardeepkumar2281 | 16 Jan, 2019, 06:42: AM
Expert Answer
Steep vertical gradient is nothing but an upright pyramid. And upright pyramid is always the pyramid of energy.
- The ecological pyramid is always upright because the distribution of energy and biomass is always reducing as the trophic level becomes higher (from primary producer to tertiary consumer).
- The total amount of energy available for utilization in the layers above is less than the energy available in the lower levels.
- This happens because according to 10% law of energy transfer. Only 10% of the total energy is transferred from one trophic level to another.
- Some energy is always lost as heat at each step. Finally it is lost to atmosphere and never goes back to Sun.
- As the amount of energy decreases at each trophic level, the pyramid of energy is always upright
Answered by Sivanand Patnaik | 16 Jan, 2019, 09:33: AM
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