Students familiarize themselves with the Simplified Arctic Ocean Food Web . Consider how these dangerous substances biomagnify as they rise from the bottom to the top of the food web. Students should keep their identities secret. Out of a class of 25 to 30 students, five or six should assume the roles of species at each trophic level in the food web. They will indicate what species they are by pantomiming their respective foraging behaviours, then capture each appropriate plant or animal, who must surrender a food token before being released.
Participants place tokens obtained in their own envelopes.
Level 5 producers demonstrate their feeding styles in a stationary squat position. A consumer can prey upon another individual only once. Participants who have lost all their original food tokens must sit out the rest of the activity. Discuss the outcome, noting that top predators will have collected the most contamination points. If time allows, repeat the simulation after repacking and redistributing envelopes.