When a zebra eats the grass, it does not obtain all of the energy the grass has When a lion eats a zebra, it does not get all of the energy from the.

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Presentation transcript:

When a zebra eats the grass, it does not obtain all of the energy the grass has When a lion eats a zebra, it does not get all of the energy from the zebra

The energy flow from one trophic level to the other is know as a food chain A food chain is simple and direct It involves organisms at separate trophic levels

Notice that the direction the arrow points  the arrow points in the direction of the energy transfer The arrow indicates “is eaten by”

The linkages in a food web illustrate the feeding pathways The food web is an illustration of the various feeding methods that links an ecosystem into a unified system of exchange. If “something happens” to one member of the food web, it will affect the entire ecosystem.

Niche: the role the organism has in an ecosystem Niches exist in food webs; if more than one species occupies the same niche in a food web, they will eventually need to compete to resources.