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The pyramid of energy is always upright because energy is lost as heat at each trophic level, making energy transfer inefficient.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecological Pyramids - Number Biomass Energy
The pyramid of energy is always upright because energy is lost as heat at each trophic level, making energy transfer inefficient.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecological Pyramids - Number Biomass Energy
Primary consumers receive less energy than producers because energy is lost as heat at each trophic level.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecological Pyramids - Number Biomass Energy
Kilojoules are a standard SI unit for energy pyramids, usually reported as kJ m⁻² yr⁻¹ or an equivalent spatial and temporal flux. However, kilocalories are also legitimate energy units and have been widely used in ecological studies, so the keyed choice is not scientifically unique. Grams measure mass and individuals measure abundance, but both listed energy units can express the same quantity after conversion. The key should therefore be retained only as a unit-preference convention and flagged as an ambiguous mismatch. A snapshot may differ seasonally, especially in plankton or annual veget
Ref: Fundamentals of Ecology, Odum & Barrett, 5th Ed., Ch. 3
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