Food Chain

food web, pyramid-shaped structure illustrating the feeding order in nature wherein each organism feeds upon the next lowest creature, feeding relationships between predators and prey wherein animals and plants get food in an ecosystem; supermarket franchise

Food chains, food webs and/or food networks describe the feeding relationships between species in an ecological community. They graphically represent the transfer of material and energy from one species to another within an ecosystem. Organisms are connected to the organisms they consume by arrows representing the direction of biomass transfer. Typically a food chain or food web refers to a graph where only connections are recorded, and a food network or ecosystem network refers to a network where the connections are given weights representing the quantity of nutrients or energy being transferred.
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E·col·o·gy n. 1. The branch of science that is concerned with the relationships between organisms and their environments. 2. [more]Food chain - Community and Resources

Noun
1. (ecology) a community of organisms where each member is eaten in turn by another member
(hypernym) organic phenomenon
(part-holonym) food web, food cycle
(classification) ecology, bionomics, environmental science

A sequence of organisms, each of which uses the next, lower member of the sequence as a food source.