Producers Consumers Decomposers - Science @ Rogene Worley Middle
Transcript of Producers Consumers Decomposers - Science @ Rogene Worley Middle
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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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