Which process leads to higher pollutant concentrations in organisms higher on the food chain?

Which process leads to higher pollutant concentrations in organisms higher on the food chain?

• A. Bioaccumulation
• B. Biomagnification
• C. Point source pollution
• D. Terrestrial ecosystem

Answer: (B)

Biomagnification occurs when pollutants that persist in the environment and resist breakdown become more concentrated as they move up the food chain. These substances often accumulate in fatty tissues, and because predators eat many contaminated prey and excrete little of the pollutant, the amount in each successive trophic level increases. This is what leads to higher concentrations in organisms higher on the chain. Bioaccumulation describes buildup within a single organism from its surroundings or diet, not the increasing concentration across multiple organisms in a food web. Point source pollution refers to a single identifiable source of pollution, not the process of concentrating through feeding relationships. A terrestrial ecosystem is simply a land-based ecological system, not a process. So the best answer is biomagnification.

Biomagnification occurs when pollutants that persist in the environment and resist breakdown become more concentrated as they move up the food chain. These substances often accumulate in fatty tissues, and because predators eat many contaminated prey and excrete little of the pollutant, the amount in each successive trophic level increases. This is what leads to higher concentrations in organisms higher on the chain.

Bioaccumulation describes buildup within a single organism from its surroundings or diet, not the increasing concentration across multiple organisms in a food web. Point source pollution refers to a single identifiable source of pollution, not the process of concentrating through feeding relationships. A terrestrial ecosystem is simply a land-based ecological system, not a process. So the best answer is biomagnification.