FOOD WEBS FOOD CHAINS Food Chain A sequence

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FOOD WEBS

FOOD WEBS

FOOD CHAINS § Food Chain. A sequence of organisms that eat one another in

FOOD CHAINS § Food Chain. A sequence of organisms that eat one another in an ecosystem.

FOOD WEBS § Food Web- A diagram that shows all the feeding relationships in

FOOD WEBS § Food Web- A diagram that shows all the feeding relationships in an ecosystem.

WHO’S INVOLVED § Food Webs have 3 groups of organisms that are involved. §

WHO’S 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

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

CONSUMERS § Consumer- An organism that eats other organisms § Primary Consumer- Eats producers § Secondary Consumers- Eat primary consumers § Tertiary Consumers- Eat secondary consumers

PRIMARY CONSUMERS

PRIMARY CONSUMERS

SECONDARY COMSUMERS

SECONDARY COMSUMERS

TERTIARY COMSUMERS

TERTIARY COMSUMERS

CONSUMERS § Primary, Secondary, and Tertiary consumers often have more than one type of

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.

DECOMPOSERS § Decomposer- An organism that consumes part of dead organisms and decaying matter.

§ Food webs like the one below can sometimes be confusing.

§ Food webs like the one below can sometimes be confusing.

Tertiary Consumers Human Snake Eagle Frog Trout Salamander Primary Consumers Dragonfly Producers Phytoplankton Mayfly

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

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

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.