Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South China
Heavy metal pollution in the mariculture areas is of considerable attention due to its potential ecological effects and public concern for seafood safety. A better understanding of the current contamination status and historical trend of heavy metals in the ecosystems of mariculture areas has an imp...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-06-01
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| Series: | Frontiers in Marine Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2022.923494/full |
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| author | Qibin Lao Qibin Lao Qibin Lao Shangjun Cai Shangjun Cai Shangjun Cai Peng Huang Peng Huang Peng Huang Fajin Chen Fajin Chen Fajin Chen Qizhong Su Xuetie Lei Xin Zhou Xin Zhou Xin Zhou Chunqing Chen Chunqing Chen Chunqing Chen Qingmei Zhu Qingmei Zhu Qingmei Zhu Xuan Lu Xuan Lu Xuan Lu Guoqiang Liu Guoqiang Liu |
| author_facet | Qibin Lao Qibin Lao Qibin Lao Shangjun Cai Shangjun Cai Shangjun Cai Peng Huang Peng Huang Peng Huang Fajin Chen Fajin Chen Fajin Chen Qizhong Su Xuetie Lei Xin Zhou Xin Zhou Xin Zhou Chunqing Chen Chunqing Chen Chunqing Chen Qingmei Zhu Qingmei Zhu Qingmei Zhu Xuan Lu Xuan Lu Xuan Lu Guoqiang Liu Guoqiang Liu |
| author_sort | Qibin Lao |
| collection | DOAJ |
| description | Heavy metal pollution in the mariculture areas is of considerable attention due to its potential ecological effects and public concern for seafood safety. A better understanding of the current contamination status and historical trend of heavy metals in the ecosystems of mariculture areas has an important implication for the sustainable development of marine ecosystems and for public health concerns. To assess the impact of human activities on heavy metal pollution in the mariculture area, seven metals (Cu, Pb, Zn, Cd, Hg, As, and Cr) and the environmental parameters were seasonally investigated in the surface seawater and sediments in Qinzhou Bay, a typical mariculture bay in South China. Seasonal variations in the concentration of heavy metals were found in both seawater and sediment, which are mainly influenced by seasonal hydrological change, biological activity, and human influence. The concentration of heavy metals in the seawater was at a relatively higher level than that of other mariculture areas in China, while a lower level was found in the sediment. The concentration of Cu increased in both seawater and sediment for the past decades (by nearly 2 times), which is mainly influenced by the mariculture and shipping activities. The concentration of Hg decreased significantly in the seawater for the past 40 years (decreased by 13 times) due to the decrease in production and usage of Hg. However, the concentrations of Pb, Zn, and Cd in seawater showed an increasing trend in the mariculture bay, while the concentrations of Pb, Zn, As, and Cr decreased in the sediment over the past decades. The decrease in pH value (decreasing by 4.7% for the past 20 years) was responsible for the different trend of those metals between seawater and sediment because the decrease in pH could re-release metals from sediments into the water column. Hg and As are the main ecological risk factors in the mariculture bay. This study suggests that environmental changes, such as ocean acidification, affect the distribution of metals in seawater and sediments, which we should be more vigilant and concerned about under the global climate change. |
| first_indexed | 2024-04-13T20:02:46Z |
| format | Article |
| id | doaj.art-1be8b5abd419405b8bcf8948398e2a37 |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-13T20:02:46Z |
| publishDate | 2022-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-1be8b5abd419405b8bcf8948398e2a372022-12-22T02:32:09ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452022-06-01910.3389/fmars.2022.923494923494Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South ChinaQibin Lao0Qibin Lao1Qibin Lao2Shangjun Cai3Shangjun Cai4Shangjun Cai5Peng Huang6Peng Huang7Peng Huang8Fajin Chen9Fajin Chen10Fajin Chen11Qizhong Su12Xuetie Lei13Xin Zhou14Xin Zhou15Xin Zhou16Chunqing Chen17Chunqing Chen18Chunqing Chen19Qingmei Zhu20Qingmei Zhu21Qingmei Zhu22Xuan Lu23Xuan Lu24Xuan Lu25Guoqiang Liu26Guoqiang Liu27College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, ChinaCollege of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, ChinaCollege of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, ChinaCollege of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, ChinaMarine Environmental Monitoring Centre of Beihai, State Oceanic Administration, Beihai, ChinaMarine Environmental Monitoring Centre of Beihai, State Oceanic Administration, Beihai, ChinaCollege of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, ChinaCollege of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, ChinaCollege of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, ChinaCollege of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory for Coastal Ocean Variation and Disaster Prediction, Guangdong Ocean University, Zhanjiang, ChinaKey Laboratory of Climate, Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong Province, Guangdong Ocean University, Zhanjiang, ChinaMarine Environmental Monitoring Centre of Beihai, State Oceanic Administration, Beihai, ChinaKey Laboratory of Marine Environmental Survey Technology and Application, Ministry of Natural Resources, Guangzhou, ChinaHeavy metal pollution in the mariculture areas is of considerable attention due to its potential ecological effects and public concern for seafood safety. A better understanding of the current contamination status and historical trend of heavy metals in the ecosystems of mariculture areas has an important implication for the sustainable development of marine ecosystems and for public health concerns. To assess the impact of human activities on heavy metal pollution in the mariculture area, seven metals (Cu, Pb, Zn, Cd, Hg, As, and Cr) and the environmental parameters were seasonally investigated in the surface seawater and sediments in Qinzhou Bay, a typical mariculture bay in South China. Seasonal variations in the concentration of heavy metals were found in both seawater and sediment, which are mainly influenced by seasonal hydrological change, biological activity, and human influence. The concentration of heavy metals in the seawater was at a relatively higher level than that of other mariculture areas in China, while a lower level was found in the sediment. The concentration of Cu increased in both seawater and sediment for the past decades (by nearly 2 times), which is mainly influenced by the mariculture and shipping activities. The concentration of Hg decreased significantly in the seawater for the past 40 years (decreased by 13 times) due to the decrease in production and usage of Hg. However, the concentrations of Pb, Zn, and Cd in seawater showed an increasing trend in the mariculture bay, while the concentrations of Pb, Zn, As, and Cr decreased in the sediment over the past decades. The decrease in pH value (decreasing by 4.7% for the past 20 years) was responsible for the different trend of those metals between seawater and sediment because the decrease in pH could re-release metals from sediments into the water column. Hg and As are the main ecological risk factors in the mariculture bay. This study suggests that environmental changes, such as ocean acidification, affect the distribution of metals in seawater and sediments, which we should be more vigilant and concerned about under the global climate change.https://www.frontiersin.org/articles/10.3389/fmars.2022.923494/fullheavy metalspHhistorical trendmariculture areaecological riskQinzhou Bay |
| spellingShingle | Qibin Lao Qibin Lao Qibin Lao Shangjun Cai Shangjun Cai Shangjun Cai Peng Huang Peng Huang Peng Huang Fajin Chen Fajin Chen Fajin Chen Qizhong Su Xuetie Lei Xin Zhou Xin Zhou Xin Zhou Chunqing Chen Chunqing Chen Chunqing Chen Qingmei Zhu Qingmei Zhu Qingmei Zhu Xuan Lu Xuan Lu Xuan Lu Guoqiang Liu Guoqiang Liu Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South China Frontiers in Marine Science heavy metals pH historical trend mariculture area ecological risk Qinzhou Bay |
| title | Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South China |
| title_full | Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South China |
| title_fullStr | Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South China |
| title_full_unstemmed | Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South China |
| title_short | Contaminant Characteristics and Influencing Factors of Heavy Metals in Seawater and Sediments in a Typical Mariculture Bay in South China |
| title_sort | contaminant characteristics and influencing factors of heavy metals in seawater and sediments in a typical mariculture bay in south china |
| topic | heavy metals pH historical trend mariculture area ecological risk Qinzhou Bay |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2022.923494/full |
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