Seaweeds play key roles in Earth processes and are the world’s largest mariculture crop. They are primary producers and links in the food webs of coastal and estuarine ecosystems, and are used in many applications that affect our everyday lives. About 220 species of seaweeds are cultivated worldwide, primarily in Asia. It has been estimated that the productivity of seaweed communities is equal to or greater than that of the most productive terrestrial plant communities.
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