Podcast
Questions and Answers
What process describes the accumulation of a substance in an organism's body over its lifetime?
What process describes the accumulation of a substance in an organism's body over its lifetime?
- Biomagnification
- Bioaugmentation
- Biodegradation
- Bioaccumulation (correct)
Which process explains the increasing concentration of a substance as it moves up the food chain?
Which process explains the increasing concentration of a substance as it moves up the food chain?
- Biomagnification (correct)
- Bioremediation
- Bioaccumulation
- Biodiversity
In the example provided, which organism would have the highest concentration of DDT?
In the example provided, which organism would have the highest concentration of DDT?
- Cormorant (correct)
- Algae
- Fish
- Shrimp
What is the unit 'ppm' used to measure in the context of DDT concentration?
What is the unit 'ppm' used to measure in the context of DDT concentration?
Which of the following is a factor that contributes to bioaccumulation?
Which of the following is a factor that contributes to bioaccumulation?
What type of substance is DDT?
What type of substance is DDT?
In what decade was DDT first produced?
In what decade was DDT first produced?
What is a major reason why DDT was initially used?
What is a major reason why DDT was initially used?
What negative effect does DDT have on birds, as described in Silent Spring?
What negative effect does DDT have on birds, as described in Silent Spring?
What happens to DDT when it enters an animal's body?
What happens to DDT when it enters an animal's body?
What is the process called where a substance builds up in an organism's body over its lifetime?
What is the process called where a substance builds up in an organism's body over its lifetime?
What happens to the concentration of DDT as you move up the food chain?
What happens to the concentration of DDT as you move up the food chain?
Which organism in the provided food chain is likely to have the highest concentration of DDT?
Which organism in the provided food chain is likely to have the highest concentration of DDT?
What does 'ppm' stand for when measuring DDT concentration?
What does 'ppm' stand for when measuring DDT concentration?
In the activity described, what do the red tokens represent?
In the activity described, what do the red tokens represent?
Which process describes the increasing concentration of toxins in organisms at higher trophic levels?
Which process describes the increasing concentration of toxins in organisms at higher trophic levels?
What type of organism initially takes up DDT from the water in the example provided?
What type of organism initially takes up DDT from the water in the example provided?
In the described activity, what role does the 'eagle' play?
In the described activity, what role does the 'eagle' play?
Flashcards
Bioaccumulation
Bioaccumulation
The process where harmful substances accumulate in an organism over time.
Biomagnification
Biomagnification
The increase in concentration of harmful substances as you move up the food chain.
Food Chain
Food Chain
A sequence showing how energy and nutrients flow from one organism to another.
Parts per million (ppm)
Parts per million (ppm)
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DDT
DDT
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Persistent Chemical
Persistent Chemical
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DDT's Impact on Birds
DDT's Impact on Birds
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Rachel Carson
Rachel Carson
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DDT Transportation
DDT Transportation
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DDT in Ecosystems
DDT in Ecosystems
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Ecosystem Feeding Activity
Ecosystem Feeding Activity
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Mean Number of Tokens
Mean Number of Tokens
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Impact of DDT on Ecosystems
Impact of DDT on Ecosystems
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Study Notes
Bioaccumulation and Biomagnification
- DDT is sprayed onto water, killing mosquitos
- Tiny algae take in some of the DDT
- Shrimp eat the algae, and fish eat the shrimps
- Cormorants eat the fish
- DDT accumulates in each organism over its lifetime
- The longer the organism lives, the more DDT it takes in
- DDT in all the shrimp a fish eats accumulates in the fish's body
- In the cormorant's body, the DDT from all the fish it eats accumulates
Biomagnification
- The concentration of DDT in an animal's body increases as you go up the food chain
- This is called biomagnification
- The next diagram shows how the concentration of DDT in the bodies of species increases in the food chain
- The concentration is measured in parts per million (ppm).
- This is the number of grams of DDT in one million grams of the organisms
Questions
- How many times greater is the concentration of DDT in a cormorant's body than in a minnow's body?
- Explain, in your own words, why the concentration in the cormorant is greater than in a minnow?
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Description
Explore bioaccumulation, where toxins like DDT accumulate in organisms over their lifespan. Understand biomagnification, where toxin concentration increases up the food chain. Learn how DDT levels rise from algae to cormorants.
