Warm up…

1. Warm up… • Arrange the following organisms to show who eats whom: • killer whale • cod fish • krill shrimp • algae • leopard seal

2. Warm up…continued • What might happen to the other organisms if algae were removed from this group? • What might happen if the killer whales were removed? • Are there any organisms in this group that eat more than one kind of food?

3. Energy Flow in Ecosystems

4. All organisms play a role in their ecosystem: • Producer (aka: Autotroph [self-feeder]) • Make their own food (usually through photosynthesis) • Ex: plants (even the Venus Flytrap!)

5. All organisms play a role in their ecosystem: • Consumers (aka: Heterotrophs [different feeders]) • Can’t make its own food • Gets energy from eating other organisms • Herbivores – eats plants • Carnivores – eats animals • Omnivores – eats plants & animals • Scavengers – eats dead plants & animals

6. 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

7. A world with no decomposers?

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

9. Producer or Consumer? Consumer (herbivore)

10. Producer or Consumer? Producer

11. Producer or Consumer? Consumer (omnivore)

12. Producer or Consumer? Consumer (carnivore)

13. Food Chains

14. Energy enters an ecosystem as… SUNLIGHT!!!

15. Food Chain • Food chain – a diagram that shows how energy in food flows from one organism to another. • Order of the food chain: • Sun – energy source • Producer • 1st Level (Primary) Consumer – eats producers (herbivore or omnivore) • 2nd Level (Secondary) Consumer – eats 1st level consumers (carnivore or omnivore) • Decomposer – recycles materials for use by producers • Arrows show the direction of the flow of energy!

17. Most organisms do not eat the same thing every day, so they are part of more than one food chain. Food web - a diagram that shows the feeding relationships between organisms in an ecosystem Food webs

18. Food Web

19. Food webs • What happens if we remove an organism?

20. Summary • 3 – What are the three roles that organisms play in an ecosystem. Describe each. • 2 – What are two examples of a decomposer? • 1 – Create a food chain that includes & ends with you.

21. Energy & Matter

22. Flow of energy • When an organism eats, it obtains energy, then uses a lot of energy in life process like growth and movement. • This means that only part of their energy is available to the next organism in the food web.

23. Energy Pyramid • Energy pyramid - a diagram that shows an ecosystem’s loss of energy • What is the purpose? • To show the amount of energy that moves from one feeding level to another in a food web • Facts: • The greatest amount of energy is available at the producer level • The least amount of energy available to going to be a the top of the food chain. • Energy Pyramid Video Clip

24. Energy Pyramids

25. Energy Pyramid

26. Energy Pyramid Model • Follow my directions to make the pyramid. • The following information should be on each side of your pyramid: • Side 1: “Key” for an Energy Pyramid • Side 2: Food Chain with 3 levels of consumers • Side 3: Energy Pyramid for your Food Chain

27. Side 1: Key for an Energy Pyramid Label each level with the type of organism (producer, 1st level consumer, etc.) and amount of energy. 1 kcal 10% 3rd Level or Tertiary Consumers 10 kcal 2nd Level or Secondary Consumers 10% 1st Level or Primary Consumers 100 kcal 10% Producers 1000 kcal

28. Side 2: Food Chain Illustrate a food chain that includes 3 levels of consumers. Food Chain: ? ? ? ?

29. Side 3: Energy Pyramid for your Food Chain Illustrate an energy pyramid for your food chain.