HBio - Energy Transfer and Biomagnification

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What is biomagnification?

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Biomagnification is the process by which the concentration of toxic substances increases in organisms at each successive level of the food chain.

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What is bioaccumulation?

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Bioaccumulation refers to the accumulation of substances, such as pesticides or other chemicals, in an organism. It occurs when an organism takes in chemicals faster than it can eliminate them.

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What is the difference between bioaccumulation and biomagnification?

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Bioaccumulation is the build-up of chemicals in a single organism, while biomagnification is the increase in concentration of these chemicals as they move up the food chain.

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What is an example of biomagnification?

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An example of biomagnification is when phytoplankton absorb mercury, small fish eat the phytoplankton, and larger fish eat the small fish, leading to higher mercury concentrations in the larger fish.

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What chemical historically caused eggshell thinning in birds?

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DDT (Dichloro-Diphenyl-Trichloroethane) caused eggshell thinning in birds.

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What happens to toxic chemicals as they move up the food chain?

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Toxic chemicals tend to accumulate and become more concentrated as they move up the food chain, a process known as biomagnification.

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What is a key cause of bioaccumulation?

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A key cause of bioaccumulation is taking in chemicals faster than a living organism can break them down and use them.

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What is an example of bioaccumulation?

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An example of bioaccumulation is a fish that accumulates mercury from the water faster than it can excrete it.

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What is the impact of pesticides on aquatic ecosystems?

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Pesticides can wash into water bodies, where they are absorbed by plankton and can lead to bioaccumulation and biomagnification in aquatic food chains.

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What is the role of phytoplankton in biomagnification?

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Phytoplankton can absorb toxic substances from the water, which can then be consumed by small fish, leading to biomagnification.