1. 1 Warm-up Draw a food chain using these organisms: Millipede Salamander Garter Snake Sharp Shinned Hawk Big Leaf Maple

2. 2 Food Chain MillipedeSalamanderGarter Snake Sharp Shinned Hawk Big Leaf Maple Today’s objective: Using a food web to illustrate and analyze how energy flows through an ecosystem.

3. 3 It’s all about ENERGY! Arrows show direction of ENERGY flow: NOT direction of eating: GrassCow GrassCow

4. 4 Food Web Insert the following organisms into your diagram to convert your food chain into a food web: Bullfrog Shrew Banana Slug Club Moss

5. 5 Food Web MillipedeSalamander Garter Snake Sharp Shinned Hawk Big Leaf Maple Banana Slug Bullfrog Shrew Food CHAIN Food WEB Club Moss

6. 6 Check in 1.How does a food web differ from a food chain? 2.Is a food web a network? Explain your answer.

7. 7 Producers Place a star next to all the organisms that are producers in your food web.

8. 8 Classifying organisms by energy intake Producer- Gets energy from the sun. Consumer- Gets energy from eating other organisms. Herbivore- eats plants Carnivore- eats animals Omnivore- eats plants and animals

9. 9 Primary, Secondary, Tertiary & Quaternary Consumers Place a “1°” next to any consumer that can act as a primary consumer… A “2°” next to any consumer that can act as a secondary consumer… A “3°” for tertiary consumers… And a “4°” for quaternary consumers.

10. 10 Trophic levels Trophic level- An organism’s position in food chain. All organisms in the same position in a food chain are in the same trophic level. MillipedeSalamanderSnakeHawkMaple Producer (1°) Primary Consumer (2°) Secondary Consumer (3°) Tertiary Consumer (4°) Quaternary Consumer

11. 11 Check-in 3.In a food web, what is the difference between a consumer and a producer? 4.If all the shrews in our food web died, could this cause a change in the hawk population? Explain.

12. 12 Abiotic Factor Add the following abiotic node to your network: –Sunlight NOTE: Use a different shape to show that this node is different from the previous biotic nodes. Draw a key for your network to identify both types of nodes and your edges.

13. 13 Biotic & Abiotic Factors Biotic Factors – The living components of an ecosystem. –Plants, animals, bacteria, etc. Abiotic factors– the non-living components of an ecosystem –Sunlight, Water, Temperature, Minerals, Salinity (salt content), Space, Rocks/soil

14. 14 ECOSYSTEMS Ecosystems include both living (biotic) and non-living (abiotic) components