In aquatic system, detritus food chain and in terrestrial ecosystem, grazing food chain are responsible for flow of larger fraction of energy.
| S. No. |
Grazing food chain (GFC) |
Detritus food chain (DFC) |
| (i) |
It starts with green plants called producers as first trophic level. |
It begins with dead organic matter and decomposers called saprophytes as first trophic level. |
| (ii) |
A much less fraction of energy flows through this type of food chain. |
A much large fraction of energy flows through this type of food chain. |
| (iii) |
Energy for food chain comes from sun. |
Energy for the food chain comes from organic remain or detritus. |
