Algal blooms in aquatic bodies cause all of the following, except

Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted, and is thus passed on to the next higher trophic level.Algal blooms impart a distinct colour to the water bodies. They cause deterioration of the water quality and fish mortality and the decomposing remains increase the BOD.