Many marine organisms depend on upwelling to bring nutrients to the surface. how might el nino affect a fisherman's way of life? < < read less

It affects a lot because upwelling affects   the movement of animal  life   in the area.as the temperature of the water changes then the position of the animal life changes.for example  the developing forms of  many  fish and invertebrates are affected because it  can wash the larvae far offshore, endangering their survival.