TY - JOUR
T1 - Effect of cage culture on sedimentary heavy metal and water nutrient pollution
T2 - Case study in Sansha Bay, China
AU - Song, Yan
AU - Li, Maotian
AU - Fang, Yixuan
AU - Liu, Xiaoqiang
AU - Yao, Huikun
AU - Fan, Chun
AU - Tan, Zijie
AU - Liu, Yan
AU - Chen, Jing
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/11/15
Y1 - 2023/11/15
N2 - The aquaculture area in China's coastal waters has increased rapidly from 6000 km2 in 1990 to 22,000 km2 in 2020. Despite extensive research regarding the effect of coastal aquaculture on water and sediment pollution, evaluating the quantitative relationship between aquaculture and pollutants remains challenging. Sansha Bay, the world's largest cage aquaculture base for Pseudosciaena crocea, is a typical enclosed bay used for investigating aquaculture pollution. A cage culture database is established from 2000 to 2020 in Sansha Bay. Meanwhile, 236 sediment samples from 3 sediment cores and 67 water samples from 4 transects are obtained from the bay for experiments. The main indicators are five nutrients (NO3−, SiO32−, PO43−, NH4+, and NO2−) in the water samples, the grain size, the heavy metal (Zn, Cu, Pb, Cr, Cd, and As) content, and the 210Pb radioactivity in sediment samples. Based on data obtained and a new calculation method, the annual increment in Zn, Cu, As, Cd, Pb, and Cr contents in the cultured zone is shown to increase by 2137 %, 1881 %, 506 %, 300 %, 202 %, and 118 % in 2000–2018, respectively, as compared with the levels in a noncultured zone. The activities of the cage culture increased NO3− by 9 %, PO43− by 30 %, NH4+ by 115 %, and NO2− by 232 %, compared with natural conservative mixing processes, such as the mixing of SiO32−, in 2020. A novel quantitative approach with broad applicability is proposed to evaluate the magnitude of anthropogenically induced environmental contamination. The effectiveness of the proposed technique is demonstrated through a case study conducted in Sansha Bay, China.
AB - The aquaculture area in China's coastal waters has increased rapidly from 6000 km2 in 1990 to 22,000 km2 in 2020. Despite extensive research regarding the effect of coastal aquaculture on water and sediment pollution, evaluating the quantitative relationship between aquaculture and pollutants remains challenging. Sansha Bay, the world's largest cage aquaculture base for Pseudosciaena crocea, is a typical enclosed bay used for investigating aquaculture pollution. A cage culture database is established from 2000 to 2020 in Sansha Bay. Meanwhile, 236 sediment samples from 3 sediment cores and 67 water samples from 4 transects are obtained from the bay for experiments. The main indicators are five nutrients (NO3−, SiO32−, PO43−, NH4+, and NO2−) in the water samples, the grain size, the heavy metal (Zn, Cu, Pb, Cr, Cd, and As) content, and the 210Pb radioactivity in sediment samples. Based on data obtained and a new calculation method, the annual increment in Zn, Cu, As, Cd, Pb, and Cr contents in the cultured zone is shown to increase by 2137 %, 1881 %, 506 %, 300 %, 202 %, and 118 % in 2000–2018, respectively, as compared with the levels in a noncultured zone. The activities of the cage culture increased NO3− by 9 %, PO43− by 30 %, NH4+ by 115 %, and NO2− by 232 %, compared with natural conservative mixing processes, such as the mixing of SiO32−, in 2020. A novel quantitative approach with broad applicability is proposed to evaluate the magnitude of anthropogenically induced environmental contamination. The effectiveness of the proposed technique is demonstrated through a case study conducted in Sansha Bay, China.
KW - Effect of cage culture
KW - Heavy metals
KW - Marine ecology
KW - Nutrients
KW - Sansha Bay
UR - https://www.scopus.com/pages/publications/85165537059
U2 - 10.1016/j.scitotenv.2023.165635
DO - 10.1016/j.scitotenv.2023.165635
M3 - 文章
C2 - 37474074
AN - SCOPUS:85165537059
SN - 0048-9697
VL - 899
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 165635
ER -