Question
Give the scientific reason : Energy flow is always unidirectional in an ecosystem.
✓
Answer
- The solar energy enters in an ecosystem through the process of photosynthesis performed by green plants.
- The energy that is captured by green plants does not revert back to the sun.
- From green plants energy passes to upper trophic levels of consumers.
- Energy obtained by herbivores does not come back to the green plants.
- As it moves progressively through the various trophic levels it is no longer available to the previous level.
- Thus, energy flow is always unidirectional in an ecosystem.
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