Why are food chains important in an ecosystem? Objective The student will be able to define common terms used in the study of ecosystems and compare/contrast characteristics of the natural environment in Fort Matanzas with the environment in which they live. Background A food chain shows the feeding relationship between different living species in a particular environment or habitat. In other words, it is the transfer of energy from one species to another as every living thing on this planet requires energy in one or other form for their growth and health. Organisms that make their own food ar Duration: 60 Minutes.