What does biological magnification refer to?

Study for the Pennsylvania Junior Envirothon Test. Explore environment-related topics through interactive quizzes, detailed explanations, and hints. Get ready for your exam!

Biological magnification refers to the process by which toxic substances accumulate in increasing concentrations as they move up the food chain. When small organisms or plants absorb pollutants or toxins from their environment, they may have relatively low concentrations of these substances. However, as larger animals consume these smaller organisms, the toxins become more concentrated in their bodies. This occurs because the larger predators do not excrete these toxins efficiently, leading to higher levels in their tissues. Consequently, top predators can have significantly higher concentrations of toxins than those found in the organisms lower in the food chain. This process poses serious threats to wildlife and ecosystems, as well as potential health risks to humans when they consume affected species.

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