Answer:
Phytoplankton are the foundation of the ocean food web, providing organic matter for virtually all other marine creatures. Their primary productivity limits the growth of crustaceans, fish, sharks, porpoises and other marine creatures. They are responsible for half of the photosynthetic activity on the planet. Phytoplankton’s role in the global ecosystem has made them a target for controlling carbon-dioxide levels in the earth’s atmosphere.
Giant kelp is a type of brown algae that grows in shallow, nutrient-rich saltwater near coastal fronts around the world. It provides habitat and food for a variety of marine organisms. Kelp and other types of marine vegetation absorb an estimated 20 times more carbon dioxide per acre than forests on land, making it a powerful force in storing this persistent greenhouse gas and mitigating the effects of climate change.