---
title: "Biomagnification: Definition & Examples | Model Diplomat"
description: "Biomagnification is the increase of toxic substances like mercury in higher trophic levels, crucial for understanding environmental impact in policy studies."
url: "https://modeldiplomat.com/learn/glossary/biomagnification"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- Biomagnification is the progressive increase in concentration of a persistent toxic substance in organisms at successively higher trophic levels of a food chain.
- How does biomagnification differ from bioaccumulation?
- Which substances biomagnify and which do not?
- Which international treaties address biomagnifying pollutants?
- Why is biomagnification relevant to Indian environmental policy?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

Biomagnification is the progressive increase in concentration of a persistent toxic substance in organisms at successively higher trophic levels of a food chain.

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Example

In 1962, Rachel Carson's Silent Spring documented how DDT biomagnified up the food chain to thin the eggshells of bald eagles and peregrine falcons, prompting the US EPA to ban agricultural DDT in 1972.

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