Marine Ecosystems: Energy Flow

In the food chain, I was the Beleen Whale.  The Beleen Whale eats krill and Copepods, and the Phytoplankton is at the bottom of the food chain as a producer.  The trophic levels start with the producers, then the primary, secondary, tertiary, and then quaternary.  As the trophic levels go up, the energy decreases by 10%.  Biomagnification occurs when the concentration of a substance in an organism exceeds the background concentration of the substance in its diet.  Examples are mercury and DDT.