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Warm-up. Draw a food chain using these organisms: . Big Leaf Maple. Millipede. Salamander. Sharp Shinned Hawk. Garter Snake. Food Chain. Sharp Shinned Hawk. Big Leaf Maple. Millipede. Salamander. Garter Snake. Today’s objective:
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Warm-up Draw a food chain using these organisms: Big Leaf Maple Millipede Salamander Sharp Shinned Hawk Garter Snake
Food Chain Sharp Shinned Hawk Big Leaf Maple Millipede Salamander Garter Snake Today’s objective: Using a food web to illustrate and analyze how energy flows through an ecosystem.
It’s all about ENERGY! Arrows show direction of ENERGY flow: NOT direction of eating: Grass Cow Cow Grass
Food Web • Insert the following organisms into your diagram to convert your food chain into a food web: Shrew Club Moss Banana Slug Bullfrog
Food Web Shrew Food WEB Sharp Shinned Hawk Big Leaf Maple Garter Snake Millipede Salamander Food CHAIN Banana Slug Club Moss Bullfrog
Check in • How does a food web differ from a food chain? • Is a food web a network? Explain your answer.
Producers • Place a star next to all the organisms that are producers in your food web.
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
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.
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. Maple Millipede Salamander Snake Hawk (1°) Primary Consumer (2°) Secondary Consumer (3°) Tertiary Consumer (4°) Quaternary Consumer Producer
Check-in • In a food web, what is the difference between a consumer and a producer? • If all the shrews in our food web died, could this cause a change in the hawk population? Explain.
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.
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
ECOSYSTEMS Ecosystems include both living (biotic) and non-living (abiotic) components