1. Energy Flow in an Ecosystem

2. Learning Targets:
Learning Target: I can state the ultimate source of energy in any ecosystem.
Learning Target: I can identify producers, primary consumers, secondary consumers, tertiary consumers and the decomposers in a food web.
Learning Target: I can look at a food web and state who eats who.
Learning Target: I can explain the importance of decomposers in an ecosystem.
Learning Target: I can use a food web to show how energy stored in one organism can be transferred to another.

3. Energy Flow Energy in an ecosystem originally comes from the sun
Energy flows through ecosystems from producers to consumers
Producers (make food)
Consumers (get food by eating producers or other consumers)

4. Producers
Sunlight is the ultimate source of energy for most life on earth.
Producers contain chlorophyll & can use energy directly from the sun

5. Autotrophs (auto=self; troph=food)
An autotroph is any organism that can produce its own food supply!
Autotrophs are also called Producers
Plants, algae, some protists, & some bacteria are examples

6. Photoautotroph (photo=light)
Producer that captures energy from the sun by:
Photosynthesis
Adds Oxygen to the atmosphere
Removes Carbon Dioxide from the atmosphere
Algae

7. Habitat of Photoautotrophs
On Land
Plants
In The Sea
Algae
Tidal Flats & Salt Marshes
Cyanobacteria

8. Consumers
Heterotrophs (hetero=different) eat other organisms to obtain energy. (e.g. animals)
Herbivores
Eat Only Plants
Carnivores
Eat Only Other Animals

9. Heterotrophs eat other organisms to obtain energy.
Consumers
Heterotrophs eat other organisms to obtain energy.
Omnivores (Humans)
Eat Plants & Animals
Detritivores
Feed On Dead Plant & Animal Remains
Earthworms and slugs are an examples
Decomposers
Break down dead plant and animal remains
Extremely important for recycling of nutrients.
Fungi & Bacteria are examples

10. Feeding Relationships
Energy flows through an ecosystem in one direction
from producers to various levels of consumers
- An arrow is used to show the flow of energy.

11. Feeding Relationships
Food Chain
Single pathway of energy through an ecosystem

12. Name the producer, consumer, herbivore, carnivore in the food chain (can be more than 1)

13. Food Chain Producer (trapped sunlight & stored food)
Tertiary consumer- Eat secondary consumers
Secondary Consumer – Eat primary consumers
Primary Consumer – Eat producers
Quaternary Consumer-Eat tertiary consumers
Producer (trapped sunlight & stored food)

14. Feeding Relationships
Food Web
All the feeding relationships between organisms in an ecosystem

15. What are producer, primary, secondary, tertiary consumers, quaternary consumers?

16. Trophic Levels
Each level in a food chain or food web is a Trophic Level.
Producers
Always the first trophic level
How energy enters the system
Herbivores (primary consumer)
Second trophic level

17. Each level depends on the one below it for energy.
Trophic Levels
Carnivores/Omnivores (secondary, tertiary, quaternary consumers)
Make Up The Remaining Trophic Levels
Each level depends on the one below it for energy.

18. Energy Lost
-Energy is lost from one trophic level (energy level) to the next level can be represented by a pyramid
-Each level above only gets 10% of the energy from below
- The other 90% is lost as heat.

19. copyright cmassengale

20. Energy Pyramid

21. Exit Ticket What is the ultimate source of energy in any ecosystem?
The ultimate source of energy is _______________.
What is the difference between a producer and a consumer?
A producer is _________________ while a consumer is _________________.