FOOD WEBS FOOD CHAINS Food ChainA sequence of

FOOD WEBS FOOD CHAINS  Food ChainA sequence of

FOOD WEBS FOOD CHAINS Food ChainA sequence of organisms that eat one another in an ecosystem.

FOOD WEBS Food Web- A diagram that shows all the feeding relationships in an ecosystem. WHOS INVOLVED Food Webs have 3 groups of organisms that are involved.

Producers Consumers Decomposers PRODUCERS Producer- An organism that is able to make its own food through photosynthesis.

Food webs always start out with the producers in an ecosystem. CONSUMERS Consumer- An organism that eats other organisms Primary Consumer- Eats producers

Secondary Consumers- Eat primary consumers Tertiary Consumers- Eat secondary consumers PRIMARY CONSUMERS SECONDARY COMSUMERS

TERTIARY COMSUMERS CONSUMERS Primary, Secondary, and Tertiary consumers often have more than one type of feeding relationship that may make them hard to fit into just one group.

Example: Trout Secondary Consumer Trout Primary Consumer

Mayfly Producer Planktonic Algae

DECOMPOSERS Decomposer- An organism that consumes part of dead organisms and decaying matter. Food webs like the one below can

sometimes be confusing. Tertiary Consumers Human Snake

Eagle Frog Trout Salamander

Primary Consumers Dragonfly Producers Phytoplankton

Mayfly Decomposers Secondary Consumers ENERGY ARROWS

Arrows on a food web are always drawn FROM food source TO food consumer. TYPES OF CONSUMERS Herbivore- Organism that eats ONLY PLANTS Will always be a primary consumer.

Carnivore- Organism that eats ONLY MEAT Carnivores that eat Herbivores are secondary consumers Carnivores that eat other Carnivores are tertiary consumers Omnivore- Organisms that eat BOTH plants and meat.

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