Podcast
Questions and Answers
What process describes the increasing concentration of a substance, like DDT, in an organism over its lifetime?
What process describes the increasing concentration of a substance, like DDT, in an organism over its lifetime?
- Biodegradation
- Bioaugmentation
- Biomagnification
- Bioaccumulation (correct)
Which of the following best describes biomagnification?
Which of the following best describes biomagnification?
- The dilution of pollutants in the environment.
- The increase in concentration of a substance as it moves up the food chain. (correct)
- The process of an organism adapting to pollutants.
- The breakdown of pollutants by bacteria.
In the example provided, which organism would likely have the highest concentration of DDT?
In the example provided, which organism would likely have the highest concentration of DDT?
- Shrimp
- Algae
- Cormorant (correct)
- Minnow
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 an example of bioaccumulation?
Which of the following is an example of bioaccumulation?
What is DDT primarily used for?
What is DDT primarily used for?
In what decade was DDT first produced?
In what decade was DDT first produced?
Which book raised awareness about the harmful effects of DDT?
Which book raised awareness about the harmful effects of DDT?
What is a characteristic of DDT that makes it persist in the environment?
What is a characteristic of DDT that makes it persist in the environment?
What is one specific effect of DDT on birds?
What is one specific effect of DDT on birds?
What process describes the buildup of DDT in an organism's body over its lifetime?
What process describes the buildup of DDT in an organism's body over its lifetime?
What happens to the concentration of DDT as you move up a food chain?
What happens to the concentration of DDT as you move up a food chain?
What unit is used to measure the concentration of DDT in organisms in the example?
What unit is used to measure the concentration of DDT in organisms in the example?
In the example food chain, which organism would have the highest concentration of DDT?
In the example food chain, which organism would have the highest concentration of DDT?
DDT is sprayed onto water, then taken up by algae, what eats the algae?
DDT is sprayed onto water, then taken up by algae, what eats the algae?
Which of the following is the proper food chain order according to the text?
Which of the following is the proper food chain order according to the text?
What is DDT?
What is DDT?
Flashcards
Bioaccumulation
Bioaccumulation
The process where toxins build up in an organism's body over time.
Biomagnification
Biomagnification
The increase in toxin concentration as it moves up the food chain.
DDT
DDT
A synthetic pesticide known for its harmful environmental effects.
Food Chain
Food Chain
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Parts per million (ppm)
Parts per million (ppm)
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Persistent chemical
Persistent chemical
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Toxic effects of DDT
Toxic effects of DDT
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Rachel Carson
Rachel Carson
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Mean number of tokens
Mean number of tokens
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Algae in food chain
Algae in food chain
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Consequences of DDT
Consequences of DDT
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Study Notes
Bioaccumulation and Biomagnification
- DDT is sprayed onto water to kill mosquitos
- Tiny algae take up some of the DDT
- Shrimps eat the algae, and fish eat the shrimps
- Cormorants (fish-eating birds) eat the fish
- DDT accumulates in all of the shrimps that a fish eats over its lifetime
- The longer the organism lives, the more DDT it gets in its body
- All of the DDT in all of the shrimps that a fish eats accumulates in the fish's body
- Eventually, all the DDT in all of the fish that a cormorant eats in its lifetime accumulates in the cormorant's body
- This process is called bioaccumulation
- The concentration of DDT in an animal's body increases as you go up the food chain
- This is called biomagnification
- The concentration of DDT in the bodies of species in a food chain increases along the 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 how toxins like DDT accumulate in organisms. Learn about bioaccumulation, the build-up of toxins in an organism's lifetime, and biomagnification, the increasing concentration of toxins up the food chain. Understand how these processes affect ecosystems.
