A Food Web shows the transfer of energy within an ecosystem. Energy is transferred between organisms when one organism eats another. It should be noted here that a food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem. An ecosystem usually has two different types of food webs: a grazing food web-based on photosynthetic plants or algae, along with a detrital food web-based on decomposers (such as fungi).