• Food webs

    Food webs Food webs
    Who's munchin Who??
     

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    A food web consists of all the food chains in a single ecosystem. Each living thing in an ecosystem is part of multiple food chains. Each food chain is one possible path that energy and nutrients may take as they move through the ecosystem. All of the interconnected and overlapping food chains in an ecosystem make up a food web.

    Herbivore - an animal that eats plants.
    Carnivore - an animal that eats other animals.
    Omnivore - an animal that eats both plants and animals eg bears and humans.

    Producer - usually a green plant that produces its own food by photosynthesis
    Primary Consumer - Animals that consume only plant matter. They are herbivores - eg rabbits, caterpillars, cows, sheep, and deer.
    Secondary Consumer - Animals that eat primary consumers (herbivores).
    Tertiary Consumer - Animals that eat secondary consumers ie carnivores that feed on other carnivores.

    Predators - kill for food. They are either secondary or tertiary consumers - eg polar bears, golden eagles
    Prey - are the organisms that predators feed on. Examples of predator and prey species are: fox and rabbit; blue tit and caterpillar; wolf and lamb

    Scavenger - a consumer that eats dead animals (e.g. crab, crow, vulture, buzzard and hyena. )
    Detritivore - a consumer that obtains its nutrients from detritus
    Decomposer - an organism such as bacteria and fungi that breaks down dead organisms and their wastes. . (They do not 'eat' the food like scavengers, as they have no mouth-parts. Instead they break down solid matter into liquids which they can absorb.) Examples: bacteria and some fungi.

    Web Site links:
    http://www.brainpop.com/games/foodfight/
    http://www.brainpop.com/games/foodchaingame/
    http://www.cserc.org/main/games/buildafoodchain/page1-1.html
    http://www.enchantedlearning.com/subjects/foodchain/

     

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