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Producers

Consumers

Decomposers

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Organism that can make its own food through photosynthesis they are the source of all the food in an ecosystem

Plants, algae, some bacteria

In some ecosystems, some producers obtain energy from sources other than the sun – chemosynthetic bacteria

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Cannot make their own food

Can be one of 4 types

Herbivores

Carnivores

Omnivores

Scavengers

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Consumers that eat only plants

Vegetarians, deer, rabbits, grasshoppers, cows, caterpillars

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Consumers that eat only meat

Owls, lions, hawks, spiders

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Consumers that eat both plants and animals

Most humans, some birds like crows and bluebirds, goats

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Feeds on the bodies of dead organisms

Catfish, hyena, raven

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Break down wastes and bodies of dead organisms

If we didn’t have decomposers all the dead bodies in the world would start stacking up and we couldn’t recycle the raw materials

Fungus, bacteria

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A series of events in which one organism eats another

Grass grasshopper

snake hawk bacteria

Energy goes in the direction of the arrow

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We use other terms for consumers in food chains

Primary consumer (1o) – eats producers

Secondary consumer (2o) – eats herbivores or omnivores

Tertiary consumer (3o) – eats carnivores or omnivores

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Many overlapping food chains

Just like you don’t eat the same food every single day – some animals don’t eat the same food every single day

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A diagram that shows the amount of energy that moves from one feeding level to another

At each higher level there is less and less energy available

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In any food web, energy is lost each time one organism eats another.

there are more plants than there are plant-eaters.

There are more autotrophs than heterotrophs, and more plant-eaters than meat-eaters.

Each level has about 10% less energy available to it because some of the energy is lost as heat at each level.

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