Sentences with phrase «productive coastal upwelling»

The most productive coastal upwelling area of the modern ocean is the Benguela upwelling system off south - western Africa, an area that is considered to represent an important modern analogue of petroleum source rocks deposited in the geological past.

Not exact matches

Since phytoplankton form the base of marine food webs, the world's most productive fisheries are located in areas of coastal upwelling that bring cold nutrient rich waters to the surface (especially in the eastern boundary regions of the subtropical gyres); about half the world's total fish catch comes from upwelling zones.