1. What happens when an organisms cannot get enough energy?

2. Feeding Relationships
Food Web – network of all the food chains in an ecosystem
Arrows point to where the energy goes!

3. Food Web

4. Autotrophs vs. Heterotrophs
Autotrophs – make their own food so they are called PRODUCERS
Heterotrophs – get their food from another source so they are called CONSUMERS

5. Omnivores- eat plants AND animals Feeds on plant and animal remains
Types of Consumers
Omnivores- eat plants AND animals
Herbivores- only eat plants
Carnivores - only eat animals
Decomposers
Feeds on plant and animal remains

6. PRODUCERS- produce their own energy -plants do this through photosynthesis

7. CONSUMERS – consume other organisms for energy

8. Consumers that eat producers to get energy:
Are primary consumers
Are herbivores (plant-eaters)

9. Most of the energy the primary consumer gets from the producer is used by the consumer.

10. Some of that energy moves into the atmosphere as heat.

11. Some energy in the primary consumer is STORED This energy is available for another consumer (predator).

12. A Consumer that Eats Another Consumer for Energy:
Secondary Consumers

13. Most of the energy the secondary consumer gets from the primary consumer is used by the secondary consumer.

14. -Some of the energy is lost as heat -some energy is stored and can be passed on to another consumer.

15. A consumer that eats a consumer that already ate a consumer:
Tertiary Consumer

16. Checkpoint
Using the food web below, predict what would happen if the mouse went extinct. Explain your reasoning

17. How does that energy flow through an ecosystem?
Energy flows through an ecosystem in ONE direction
sun or chemicals
autotrophs
heterotrophs

18. Energy Pyramids
Amount of available energy decreases for higher consumers
Amount of available energy decreases down the food chain (or as you go up in the pyramid)

19. Energy Pyramids
It takes a large number of producers to support a small number of primary consumers
It takes a large number of primary consumers to support a small number of secondary consumers

20. Ecological Pyramids
Trophic Level – each step in a food chain or food web
Biomass Pyramid
Energy Pyramid
Pyramid of Numbers

21. Pyramid of Energy – amount of energy available at each trophic level
Only 10% of the energy from each trophic level is passed on to the next level
Most of the energy is used by the organisms for life processes
Some of the energy is lost as heat

23. Why are nutrients important ?
Every living organism needs nutrients to build tissues and carry out essential life functions.
95% of your body is made of…
OXYGEN
CARBON
HYDROGEN
NITROGEN

24. Exit Ticket (Assessment Grade)
Explain why only 10% of the energy from an organism gets transferred to the next level in an energy pyramid
Use complete sentences!!!