Table 2: Summary of case studies on nutrient removal by seaweed aquaculture in China, showing local biogeochemical significance of seaweed farms.

From: Nutrient removal from Chinese coastal waters by large-scale seaweed aquaculture

 LocationSeaweed CultivationSeawater Nutrient Concentration Reduction EfficiencyRef
BayRegionLatitudeYearArea (km2)SpeciesNH4-N (%)NO3-N (%)PO4-P (%)
1Radial sandbank, JiangsuSouth Yellow Sea120°′30′–121°40′E, 31°30′–33°40′N2012–2013N/APyropia yezoensis44%49%45%Wu et al.20
2Xiangshan harbor, ZhejiangEast China Sea121°36′–121°37′ E, 29°32′ N20110.000054 (Cage study)Gracilariopsis longissima22–61%24–47%22–58%Huo et al.21
3Hangzhou Bay, ShanghaiEast China Sea121°18′ E, 30°42′ N2006–20070.075Gracilariopsis longissima54%75%49%Huo et al.33
4Lusi coast, JiangsuEast China Sea121°35′ E, 32°05′ N2002–20043.00Pyropia yezoensis50–94%21–38%42–67%He et al.22
Average53% ± 7%47% ± 10%47% ± 3%