Toxins Building Up in Food Chains

Description

Explain how organisms affect and are affected by their environment, including the bioaccumulation of toxic materials (e.g. pesticides, heavy metals) through food chains

Mastery Evidence

• ✓ Defines bioaccumulation and explains why toxins increase in concentration higher up the food chain
• ✓ Gives a real example of bioaccumulation (e.g. DDT in peregrine falcons, mercury in tuna)
• ✓ Explains how organisms can change their habitat (e.g. earthworms aerating soil, beavers creating wetlands)
• ✓ Discusses why top predators are most at risk from bioaccumulation