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km2 of coastal ocean removed of N inputs km−2 of seaweed farm
Seaweed Farm P Footprint area
km2 of coastal ocean removed of P inputs km−2 of seaweed farm
The seaweed farm N and P footprint area refers to the km2 of Chinese coastal waters receiving nutrient inputs equivalent to those removed by one km2 of seaweed farms. *The average tissue nutrient concentrations of Chinese seaweed, as weighted per species (Tables S2–3); **Nutrient input from the inventory integrating the riverine and atmosphere resources, weighted by area of East China Sea and Yellow Sea10,31.