Grazing food chain starts with green plants which are the producers. The green plants or producers are grazed by herbivorous animals which are further eaten by carnivores.
Primary producers (Autotrophs)-> Primary consumers (Herbivores)-> Secondary Consumers (Carnivores)
1. The chain begins with green plants (producers) at the first trophic level
2. Energy for this food chain comes from the sun
3. Food chain adds energy into the ecosystem
4. The food chain fixes inorganic nutrients
5. It consists of all macroscopic organisms
Detritus food chain starts with dead organic matter which is eaten by animals which in turn are eaten by other animals in the soil. a large amount of energy flows through the detritus food chain. ultimately the organic matter is decomposed.
1. The chain begins with detritivores (decomposers) at the first trophic level
2. Energy for this food chain comes from remains of detritus
3. This food chain take up energy from the detritus, ensuring maximum utilization and minimum wastage
4. The food chain helps in fixing inorganic nutrients
5. It consists of sub soil organisms