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Herbivore  An organism that only eats plants (cow, caterpillar)  Are human vegetarians herbivores? Why or why not?

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Presentation on theme: "Herbivore  An organism that only eats plants (cow, caterpillar)  Are human vegetarians herbivores? Why or why not?"— Presentation transcript:

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2 Herbivore  An organism that only eats plants (cow, caterpillar)  Are human vegetarians herbivores? Why or why not?

3 Carnivore  An organism that eats only meat (lion, eagle)  What are some other examples of carnivores?

4 Omnivore  An organisms that eats both plants and animals (chimpanzees, turtles)

5 Detrivore  An organism that eats dead plant and animal remains (snails, earthworms)  Can you think of any other examples?

6 Now, you are going to make your very own FOOD WEB!  List all the PLANTS in the bottom section.  Write all the names of the HERBIVORES in the next section, above the plants.  Write all the names of the OMNIVORES in the next section, above the herbivores  Write all the names of the CARNIVORES in the next section, above the omnivores  Leave the last section blank

7 It will look something like this:

8 Now, EXPAND your web!  After you have all the names of plants and animals organized, draw arrow from the organisms that provide energy to the organisms that receive energy  *they should show the DIRECTION OF ENERGY, not who was eaten*  Think of other organisms that might compete with you for your food. List them on a separate piece of paper. Then, add them to the appropriate level of your food web. Add correct arrows to and from these new organisms, in the direction of energy flow

9 Other Food Webs:

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11 What do all the organisms in the bottom section of your food web have in common?  What kind of organisms are they?  What do they eat?  Where do they get their energy?

12 Autotrophs  Auto = Self-made  example: Automatic, Automobile  Troph = Eater / Food  Example: trophy (prizes in competitions used to be food!)  So, AUTOTROPHS make their own food  Plants make their own food by converting sunlight, CO2, and Water into Glucose.  Plants get ALL their energy from the sun, but all the plants on Earth use only about 1% of the sunlight that hits the planet

13 Producers  AUTOTROPHS are the same thing as PRODUCERS  Plants all also called PRODUCERS because they produce their own energy / food  They use photosynthesis to create food (Glucose) from Sunlight, CO2, and Water.  What would happen if there were no producers?

14 What do all the organisms in the second section of your food web have in common?  What do they eat?  Where do they get their energy?  Are they carnivores, herbivores or omnivores?

15 Heterotrophs  Hetero = differentTroph = food  HETEROTROPH is an animal that can’t make it’s own food and must eat another organism to survive  Heterotrophs are ALL organisms that eat other organisms  They are herbivores, carnivores, omnivores, and detrivores. ALL of these animals cannot make their own food, and must eat someone else FOR food!

16 Consumers  CONSUMERS are the same thing as HETEROTROPHS  They consume energy (food) rather than produce it  Consumers are divided into groups:  PRIMARY CONSUMERS eat autotrophs (eat plants)  SECONDARY CONSUMERS eat primary consumers that eat producers (eat animals that eat plants)  TERTIARY (3 rd ) CONSUMERS eat heterotrophs that eat heterotrophs that eat autotrophs (animals that eat animals that eat plants)

17 Consumers  Are PRIMARY CONSUMERS herbivores, carnivores, or omnivores?  They are HERBIVORES  Looking at your food web, can you name a primary consumer?  Are SECONDARY CONSUMERS herbivores, carnivores, or omnivores?  They can be either CARNIVORES or OMNIVORES  Looking at your food web, can you name a secondary consumer?  How about TERTIARY CONSUMERS?  They can be either CARNIVORES or OMNIVORES  Do you have any tertiary consumers on your food web?

18 Decomposers  DECOMPOSERS are heterotrophs that eat dead things and in the process return nutrients to the soil.  DECOMPOSERS are always DETRIVORES  Detrivore specifies that they eat dead things  Decomposer specifies that they break down dead things and return nutrients to the soil  What are some examples of DECOMPOSERS?

19 DECOMPOSERS  Bacteria  Fungi  Flies  Maggots  Hyenas  Dung Beetles  Worms  Mold

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