Warm up What is an ecosystem? What is a community?
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Transcript of Warm up What is an ecosystem? What is a community?
![Page 1: Warm up What is an ecosystem? What is a community?](https://reader035.fdocuments.in/reader035/viewer/2022062314/56649f165503460f94c2b9d3/html5/thumbnails/1.jpg)
Warm up
• What is an ecosystem?
• What is a community?
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Warm up
• What is an ecosystem?• What is a community?– One of the main points about an ecosystem is the
interaction between biotic and abiotic factors. – A community is groups of populations interacting
with one another.
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Investigation 4, Part 2
Mono Lake Food Web
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Objective
• Students will understand food webs as evidenced by completing an accurate portrayal of the Mono Lake Food web
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Mono Lake
• One way the organisms in the Mono Lake system interact is by eating each other. (Nom, nom….Lunch!)
• This is called a feeding relationship.• I have sets of cards of important organisms from Mono
Lake.• Each card contains:
– Photo– Common and scientific name– Life cycle and population dynamics– How it gets food– It’s role in the ecosystem
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Mono Lake Cards
• Organize the cards, picture side up.• Use the arrow strips to show feeding
relationships between the organisms. (Who eats who?)
• Every organism should be included in this chart.
• If an organism is involved in more than one feeding relationship, indicate that with more than one arrow
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Arrow Direction
• Do spiders and flies have a feeding relationship?
• Who gets eaten?
• How do you represent that relationship?
– Fly Spider
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Arrow Direction
• Do spiders and flies have a feeding relationship? – Yes
• Who gets eaten?– The spider eats the fly
– Fly Spider
– The arrow goes from the fly to the spider even though the spider eats the fly. The arrow represents the energy of the fly going into the spider.
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You may begin
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This is what your web should have displayed
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Food Chain
• In an ecosystem, many organisms survive by eating other organisms.
• The benefits of the food eaten by one organism can then move to one and then another organism as each one is eaten.
• The path that food takes from one to another organism is called a food chain.
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• Draw the arrows in:
• Planktonic aglae Brine shrimp
• California Gull Coyote
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Food Web
• I saw lots of organisms in your groups that were connected by more than one arrow.
• Some organisms like phalaropes eat more than one organism.
• Some organisms like brine shrimp are eaten by many organisms.
• When you connect all the arrows, the arrows cross each other in complicated ways.
• A diagram that shows all the feeding relationships is called a food web.
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Types of Organisms Questions
• What types of organisms do not eat other organisms?
• How do they survive with out eating?
• Organisms that make their own food are producers. They make food that is consumed in an ecosystem.
• In the Mono Lake ecosystem, the producers are algae.
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Types of Organisms Answers
• What types of organisms do not eat other organisms?– The two kinds of algae
• How do they survive with out eating?– All living things need food/energy to survive, so they
must make their own. • Organisms that make their own food are producers.
They make food that is consumed in an ecosystem.• In the Mono Lake ecosystem, the producers are
algae.
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Types of Organisms
• Producers like algae make their own food, but animals like brine shrimp and gulls do not.
• How do brine shrimp and gulls get food?
• Organisms that eat other organisms are called consumers.
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There are many types of Consumers:
• Take out your journal and jot some notes about these:
• Primary or first level consumers• Secondary or second level consumers• Tertiary or third level consumers• Fourth Level consumers
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Types of Consumers
• Consumers that eat producers are primary or first-level consumers.
• Which animal is the primary consumer?
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• Consumers that eat primary or first-level consumers are secondary of second-level consumers.
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• Consumers that eat secondary or second-level consumers are tertiary or third-level consumers.
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• Consumers that eat tertiary or third-level consumers are fourth-level consumers.– And so on……..
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Another Type of organism
• Some things never get eaten. • They die natural deaths.• These dead organisms are broken down and
consumed by microorganisms called decomposers.
• Bacteria and fungi are decomposers. • Everything that is not eaten by a consumer is
eventually eaten by a decomposer.
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Revisit your Food Web
• This time show the LEVEL of the organisms in your web.
• Producers on the bottom.• Primary consumers are the next level up, etc…
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Some are Tricky
• Red-necked phalaropes– Eat both brine shrimp and brine flies making them
secondary consumers.– Also eat planktonic algae making them primary
consumers.
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Another Tricky example
• California gulls– Eat mostly brine shrimp and flies.– Given the chance will eat eggs and chicks of snowy
plovers and Caspian terns.
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Question:
– How can we show these dual roles on our charts?– What about decomposers? How should we show
them?
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Finish up Lab sheet 21.
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Wrap up
• Let’s talk about the questions on the sheet