Even when the supply of inorganic nutrients to the surface is high, due to for example upwelling, the absolute concentration of nutrients in the surface may still be low.

Question

Quizplus · Accepted Answer

Even when there is an abundant supply of inorganic nutrients to the surface due to upwelling, factors such as the rapid uptake and recycling of nutrients by phytoplankton can still result in low absolute concentrations of nutrients in the surface waters.

Even When the Supply of Inorganic Nutrients to the Surface