Food chain

Food chains and food webs or food networks describe the feeding relationships between species in a biotic community. In other words, they show the transfer of material and energy from one species to another within an ecosystem.

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As usually diagrammed, an organism is connected to another organism for which it is a source of food energy and material by an arrow representing the direction of biomass transfer. Organisms are grouped into trophic levels—from the Greek for nourishment, trophikos—based on how many links they are removed from the primary producers. Primary producers, or autotrophs, are species capable of producing complex organic substances (essentially "food") from an energy source and inorganic materials. These organisms are typically photosynthetic plants or algae, but in rares cases, like those organisms forming the base of deep-sea vent food webs, can be chemotrophic.

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Biotic community: REDIRECT Biocoenosis...

Ecosystem: In ecology, an ecosystem is a naturally occurring assemblage of organisms (plant, animal and other living organisms—also referred to as a biotic community or biocoenosis) living together with their environment (or biotope), functioning as a loose unit....

Organism: In biology and ecology, an organism (in Greek organon = instrument) is an assembly of organs that influence each other in such a way that they function as a more or less stable whole and have properties of life....

Food chain related Images and Photos (experimental)

Food Prep	Chain Lightning	Chain Lightning	Chain Mail Coif
Chain Mail Coif	Chain Mail Coif	Chain Mail Shirt	Chain of Fools (DVD)
Chain of Command (DVD)	Good Food arrow	Carmen 'Chain' Poster	Cutting Food Box