Under climate scenarios, seaweed farming is now used globally as a promising approach for achieving carbon neutrality. Seaweed farming contributes substantial amounts of organic carbon to the ocean, part of which can be locked for a long time in the ocean and function as ocean carbon sequestration, and the other part can be converted to inorganic carbon through microbial mineralization and aerobic respiration, affecting the seawater carbonate system and carbon dioxide (CO2) sink/source effects (note that CO2 sink ≠ carbon sequestration).
