Transcript ENERGY TRANSFER - Olympic High School

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