| Grazing Food Chain $(GFC)$ | Detritus Food Chain $(DFC)$ |
|---|---|
| $1$. It begins with producers (green plants) and moves to consumers. | $1$. It begins with dead organic matter (detritus). |
| $2$. It derives energy directly from the sun. | $2$. It derives energy from organic remains. |
| $3$. It is the major conduit for energy flow in an aquatic ecosystem. | $3$. It is the major conduit for energy flow in a terrestrial ecosystem. |
| $4$. It is usually larger in size. | $4$. It is usually smaller in size but plays a vital role in nutrient cycling. |
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