2. Different types of consumers
• REVIEW: What is a consumer?
• Consumer is any organism that eats other
organisms for energy
– Herbivore
• Eats plants only
– Carnivore
• Eats other animals only
– Omnivore
• Eats plants and animals
3. Food Chains
• How energy (food) passes from one organism
to another
• Usually have 3 – 4 links
• Many food chains in any ecosystems
4. Food Chains
• First link is a producer
– Gets energy from the
sun
• Second link of a food
chain is usually a
herbivore
– Eats producers
• Third link of a food
chain is usually a
carnivore
– Animal that eats other
animals
5. Food Chains
continued…
• Fourth link is a top
carnivore
– Eats other carnivores
• When an organism dies
in an ecosystem,
decomposers feed on
the dead organism
– Returns nutrients to the
soil
– Ex: bacteria and fungi
6. Food Webs
• Includes many groups
of food chains that
overlap
• Shows how energy
moves through an
ecosystem
Hinweis der Redaktion
Today we are going to be learning about food chains and how different organisms are organized depending on what they eat.
This is a picture that I took in Alaska two summers ago, when I went on a camping/fishing trip. As you can see, this grizzly bear is searching for food in the river. What do you think he is looking for?
