Biomagnification is the increase in the buildup of toxins within substances that happens at each stage of the food chain.

Biomagnification is caused by the following factors:

• When a substance cannot be broken down by environmental processes

• Substances concentration increases progressively as it moves up the food chain

• Low or non-existent rate of internal degradation or excretion of the toxic substance

For more relevant articles refer to the links given below:

• UPSC Environment and Ecology Questions
• Conservation of Biodiversity
• UPSC Environment and Ecology