Name the three major types of plankton.Which of these is responsible for the majority of the primary productivity near the ocean surface?

Plankton

Small and often microscopic organisms that drift or float in water, forming the base of aquatic food webs.

Primary Productivity

The rate at which plants and other photosynthetic organisms produce organic compounds (such as carbohydrates) from carbon dioxide and water in the presence of sunlight, which serves as the basis for most food chains.