PowerPoint describing food chains and food webs

1. Feeding
Relationships
How energy gets transferred

2. Feeding Relationships
Organisms within an ecosystem are
interconnected by theirfeeding
relationships.

4. Producers
 Some organisms, known as autotrophs,
create their own food through
photosynthesis.
 They get energy from the sun and
nutrients from their surroundings (soil,
water, etc.) that they in turn pass on to
the organisms that eat them.

5. Examples:
Plants
Algae
Photosynthetic Bacteria

6. Consumers
 Some organisms, known as
heterotrophs, get their food by eating
other organisms.
 Sunlight energy is passed through the
food chain when a producer is eaten.
 There are different levels: Primary
consumers, secondary consumers, etc…

7. Examples:
Mouse
Eagle
Fox

8. Ultimately Photosynthesis
makes energy within the
ecosystem

9. Food chains illustrate simplified feeding
relationships among organisms.
100 KJ
producer
Primary
Consumer
10 KJ
Secondary
Consumer
1 KJ
Tertiary
Consumer
Due to heat and other metabolic losses, energy
decreases by 90% at eachtrophic level.

10. This is why there are far more producers
than consumers.

11. We can categorize animals
by what they eat as well.
Carnivores eat meat only
Omnivores eat both meat and plants
Herbivores eat plants only

12. Draw the path of sunlight and label
according to the notes

13. Autotroph
1st level
consumer

14. Decomposers help release nutrients and gain energy
from waste or dead autotrophs and heterotrophs.
They recycle vital
nutrients
•Carbon
•Nitrogen
•Phosphorus

15. Food webs demonstrate a more realistic
representation of how feeding relationships
connect organisms in an ecosystem.

16. Label the food web with the following: Producers, Carnivores, Omnivores,
and Herbivores