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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
Warm-up

Draw a food chain using these organisms:

Big Leaf

Maple

Millipede

Salamander

Sharp

Shinned

Hawk

Garter

Snake

food chain
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
It’s all about ENERGY!

Arrows show direction of ENERGY flow:

NOT direction of eating:

Grass

Cow

Cow

Grass

food web
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 web1
Food Web

Shrew

Food WEB

Sharp

Shinned

Hawk

Big Leaf

Maple

Garter

Snake

Millipede

Salamander

Food CHAIN

Banana

Slug

Club

Moss

Bullfrog

check in
Check in
  • How does a food web differ from a food chain?
  • Is a food web a network? Explain your answer.
producers
Producers
  • Place a star next to all the organisms that are producers in your food web.
classifying organisms by energy intake
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
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 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 in1
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
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 & 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

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