Eutrophication assessment and bioremediation strategy using seaweeds co-cultured with aquatic animals in an enclosed bay in China.
Intensive mariculture results in a rise in nutrient concentrations, then leads to serious eutrophication in coastal waters. Based on the sampling data obtained between August 2012 and July 2013, the eutrophication status in Yantian Bay was assessed, and the proportion of marine animals co-cultured with seaweeds was evaluated. The nutritional quality index (NQI) ranged from 4.37 to 13.20, indicating serious eutrophication conditions. The annual average ratio of nitrogen/phosphorus (N/P) was 25.19, indicating a nitrogen surplus in this system. DIN was selected as the best parameter to balance seaweed absorption and marine animal DIN production. Gracilaria lemaneiformis and Laminaria japonica were selected as co-cultured seaweeds. The optimal proportion of G. lemaneiformis production was assessed as 20074.14 tonnes. The optimal proportion of L. japonica production was evaluated as 15890.68 tonnes. High-temperature adapted seaweeds should be introduced for removing nutrients releasing by farmed aquatic animals in the summer in Yantian Bay.
College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China; Marine Scientific Research Institute, Shanghai Ocean University, Shanghai 201306, China; Water Environment & Ecology Engineering Research Center of Shanghai Institution of Higher Education, Shanghai 201306, China.
Hailong
H
Wu
College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China; Marine Scientific Research Institute, Shanghai Ocean University, Shanghai 201306, China; Water Environment & Ecology Engineering Research Center of Shanghai Institution of Higher Education, Shanghai 201306, China.
Yuanzi
Y
Huo
College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China; Marine Scientific Research Institute, Shanghai Ocean University, Shanghai 201306, China; Water Environment & Ecology Engineering Research Center of Shanghai Institution of Higher Education, Shanghai 201306, China.
Ming
M
Hu
College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China; Marine Scientific Research Institute, Shanghai Ocean University, Shanghai 201306, China; Water Environment & Ecology Engineering Research Center of Shanghai Institution of Higher Education, Shanghai 201306, China.
Zhangliang
Z
Wei
College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai 201306, China; Marine Scientific Research Institute, Shanghai Ocean University, Shanghai 201306, China; Water Environment & Ecology Engineering Research Center of Shanghai Institution of Higher Education, Shanghai 201306, China. Electronic address: pmhe@shou.edu.cn.
Peimin
P
He
D000818:Animals; D017756:Aquaculture; D061006:Bays / Q000032:analysis; D001673:Biodegradation, Environmental; D002681:China; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D052918:Environmental Restoration and Remediation; D005068:Eutrophication; D005399:Fishes; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism; D010758:Phosphorus / Q000032:analysis; D012621:Seasons; D012624:Seaweed / Q000502:physiology*; D014874:Water Pollutants, Chemical / Q000032:analysis
D014874:Water Pollutants, Chemical; D002734:Chlorophyll; D010758:Phosphorus; D009584:Nitrogen; D000077194:Chlorophyll A
Bioremediation strategy; Eutrophication; Integrated multi-trophic aquaculture (IMTA); Mariculture; Seaweeds