Bioamplification or biomagnification is a process in which there is an increase in the concentration of a certain compound(pollutant or pesticide) in the tissue of organisms as it travels up in the food chain.
The major cause of bioamplification is the release of agricultural wastes that contain insecticides, etc and industrial wastes that contain toxic metals like mercury, lead, cadmium, etc in the water. That is further accumulated in the animal tissues.
Final answer: Biomagnification is also known as bioamplification.