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Food Chain

Food Chain.

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Food Chain

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  1. Food Chain

  2. Food chains, also called food webs, food networks and/or trophic networks, describe the feeding relationships between 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.

  3. The source of all food is the activity of autotrophs, mainly photosynthesis by plants

  4. They are called producers because only they can manufacture food from inorganic raw materials. • This food feeds herbivores, called primary consumers. • Carnivores that feed on herbivores are called secondary consumers. • Carnivores that feed on other carnivores are tertiary (or higher) consumers

  5. Each level of consumption in a food chain called a trophic level.

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