Answer : The detritus food chain begins with dead organic materials is called a detritus food chain. Dead organic matter and the organisms feeding on the dead and decaying matter are referred to as detritivores or decomposers. These detritivores are eaten by predators. The detritus food chain produces a large amount of energy to the ecosystem. Detritus food chains are found in a variety of places such as the bottom of the ocean, sea, ponds and also in lakes.