This presentation is all about the flow of energy in an ecosystem.

1. By: Albin N. Lodor
Energy Flow in Ecosystem

2. Arrange the following organisms to show
who eats whom:
– Frog
– Hawk
– Grass
– Snake
– grasshopper

3.  What might happen to the other organisms
if grass were removed from this group?
 What might happen if the hawk were
removed?
 Are there any organisms in this group that
eat more than one kind of food?

4. Energy Flow in Ecosystems

5. All organisms play a role in their
ecosystem:
Producer (Autotroph)
– Make their own food (usually
through photosynthesis)

6. All organisms play a role in their
ecosystem:
 Consumers (Heterotroph)
– Can’t make its own food
– Gets energy from eating other organisms
1. Herbivores – eats plants
2. Carnivores – eats animals
3. Omnivores – eats plants & animals
• Scavengers – eats dead animals

7. All organisms play a role in their
ecosystem:
 Decomposers
– Break down waste and dead organisms to
return raw materials to the environment
Ex: bacteria, fungi, worms

8. A world with no decomposers?

9. Producer or Consumer?
Venus flytrap – producer
Fly - consumer

10. Producer or Consumer?
Consumer (herbivore)

11. Producer or Consumer?
Producer

12. Producer or Consumer?
Consumer (omnivore)

13. Producer or Consumer?
Consumer (carnivore)

14. Energy enters an ecosystem as…
SUNLIGHT!!!
Source
of
energy!

15. Food Chain
 Food chain – shows one path of the flow of
energy in an ecosystem
 Order of the food chain:
1.Sun – energy source
2.Producer
3.1st
level Consumer – eats producers
4.2nd
level Consumer – eats 1st
level consumers
5.Decomposer – recycles materials for use by
producers

17. Food web
– a model that shows the
energy flow through different
organisms in an ecosystem.
consists of many overlapping
food chains in an ecosystem

19. FOOD WEB VS FOOD CHAIN

20. Short quiz...
1. A model that shows the energy flow
through different organisms in an
ecosystem.
2. Break down waste and dead
organisms to return raw materials to
the environment.
3. It can make their own food.

21. 4. It can’t make its own food.
5. It shows one path of the flow of
energy in an ecosystem.
6-8. What are the three roles that
organisms play in an ecosystem.
Describe each.
9-10. What are two examples of a
decomposer?