dead organisms are the source of nutrients for decomposers & survivor respiration preserve ->  rotting organisms are a source of nutrients for decomposers  a toadstool is a mean of mold & in the food chain process fungi have the role of decomposer -> in the food chain process mushrooms have the role of decomposer in the food chain process mushrooms have the role of decomposer  highlands sugars are a sink of zygotes for decomposers & in the food chain process mushrooms have the role of decomposer -> rotting organisms are a source of food for mushrooms