Question

In the open ocean, _____ are the main producers. A. zooplankton

B. phytoplankton C. ocean plants D. symbiotic algae

Answer 1

phytoplankton

Answer 2

Planktons primary importance to ocean ecosystems is primary production. This is exhibited with phytoplankton that is photosynthetic and provides energy for higher trophic level organisms such as nekton and bethos. They are essentially the plants of the marine ecosystem.