A food web is made up of multiple food chains. A food web is made by identifying what each organism eats or where it gets its energy from. Then, all the organisms in that specific ecosystem (i.e., temperate forest) you are observing can be connected by arrows, indicating what organism becomes food for another organism. All the arrows within a food web represent a transfer of energy from one organism to the next.  Since a food web combines food chains, it may show the transfer of energy between food chains. For example, a grazing food chain, which is producer-based, may move from producer to primary consumer to secondary consumer. Then, the secondary consumer may die and provide energy for the decomposers, which starts the beginning of another food chain from decomposers to detritivores to back to secondary and tertiary consumers.