Distribution Characteristics of Nutrients and Eutrophication Assessment in Yueqing Bay
Based on the Marine environment monitoring data of Yueqing Bay in spring, summer, autumn and winter from 2018 to 2019, the spatial and temporal distribution characteristics of nutrient salts (dissolved inorganic nitrogen, DIN) and active phosphate (DIP) in the sea were analyzed, and the pollution de...
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Editorial Office of Ocean Development and Management
2024-09-01
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| Series: | Haiyang Kaifa yu guanli |
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| author | YAO Kaixue YIN Rui WANG Yang CHEN Feng LI Zhenhua |
| author_facet | YAO Kaixue YIN Rui WANG Yang CHEN Feng LI Zhenhua |
| author_sort | YAO Kaixue |
| collection | DOAJ |
| description | Based on the Marine environment monitoring data of Yueqing Bay in spring, summer, autumn and winter from 2018 to 2019, the spatial and temporal distribution characteristics of nutrient salts (dissolved inorganic nitrogen, DIN) and active phosphate (DIP) in the sea were analyzed, and the pollution degree, eutrophication degree and nutrient structure of the sea area were evaluated by single factor index method, eutrophication index method and potential eutrophication model. The results showed that there were seasonal differences in nutrient concentration in Yueqing Bay, with the average DIN concentration in autumn>summer>spring>winter, and the average DIP concentration in autumn > winter = spring > summer. In terms of spatial distribution, DIN concentration showed a gradual upward trend from the mouth of the bay to the top of the bay, while DIP concentration showed different seasonal distribution trends. A few key aspects that affect the DIN distribution pattern include land source input, seawater cultivation, and engineering construction. The primary factors affecting the distribution pattern of DIP are sediment release, seawater culture, and power plant temperature drainage. The results of the single factor index method showed that the nutrient concentrations of most of the surveyed stations in the four seasons of Yueqing Bay did not meet the second and fourth types of seawater quality standards, and were mainly concentrated in the top and middle of the bay. The results of eutrophication index method showed that the sea area of Yueqing Bay was in a state of eutrophication to varying degrees throughout the year, and it was the most serious in autumn. The analysis of potential eutrophication patterns showed that the N/P ratio of most of the survey stations in this area was generally greater than that of the Redfield ratio (16), and the water were mainly in a phosphorus-restricted state in spring and summer, and unrestricted in autumn and winter. |
| format | Article |
| id | doaj-art-164e356ddd884b5db71f7b954a19598f |
| institution | Kabale University |
| issn | 1005-9857 |
| language | zho |
| publishDate | 2024-09-01 |
| publisher | Editorial Office of Ocean Development and Management |
| record_format | Article |
| series | Haiyang Kaifa yu guanli |
| spelling | doaj-art-164e356ddd884b5db71f7b954a19598f2025-02-08T03:43:31ZzhoEditorial Office of Ocean Development and ManagementHaiyang Kaifa yu guanli1005-98572024-09-014191211321005-9857(2024)09-0121-12Distribution Characteristics of Nutrients and Eutrophication Assessment in Yueqing BayYAO Kaixue0YIN Rui1WANG Yang2CHEN Feng3LI Zhenhua4Marine and Fishery Institute, Zhejiang Ocean University, Zhoushan 316021, ChinaZhejiang Institute of Marine Fisheries, Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds, Ministry of Agriculture, Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resources of Zhejiang Province, Zhoushan 316021, ChinaOcean and Fishery Bureau of Zhoushan, Zhoushan 316000, ChinaZhejiang Institute of Marine Fisheries, Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds, Ministry of Agriculture, Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resources of Zhejiang Province, Zhoushan 316021, ChinaZhejiang Institute of Marine Fisheries, Scientific Observing and Experimental Station of Fishery Resources for Key Fishing Grounds, Ministry of Agriculture, Key Laboratory of Sustainable Utilization of Technology Research for Fishery Resources of Zhejiang Province, Zhoushan 316021, ChinaBased on the Marine environment monitoring data of Yueqing Bay in spring, summer, autumn and winter from 2018 to 2019, the spatial and temporal distribution characteristics of nutrient salts (dissolved inorganic nitrogen, DIN) and active phosphate (DIP) in the sea were analyzed, and the pollution degree, eutrophication degree and nutrient structure of the sea area were evaluated by single factor index method, eutrophication index method and potential eutrophication model. The results showed that there were seasonal differences in nutrient concentration in Yueqing Bay, with the average DIN concentration in autumn>summer>spring>winter, and the average DIP concentration in autumn > winter = spring > summer. In terms of spatial distribution, DIN concentration showed a gradual upward trend from the mouth of the bay to the top of the bay, while DIP concentration showed different seasonal distribution trends. A few key aspects that affect the DIN distribution pattern include land source input, seawater cultivation, and engineering construction. The primary factors affecting the distribution pattern of DIP are sediment release, seawater culture, and power plant temperature drainage. The results of the single factor index method showed that the nutrient concentrations of most of the surveyed stations in the four seasons of Yueqing Bay did not meet the second and fourth types of seawater quality standards, and were mainly concentrated in the top and middle of the bay. The results of eutrophication index method showed that the sea area of Yueqing Bay was in a state of eutrophication to varying degrees throughout the year, and it was the most serious in autumn. The analysis of potential eutrophication patterns showed that the N/P ratio of most of the survey stations in this area was generally greater than that of the Redfield ratio (16), and the water were mainly in a phosphorus-restricted state in spring and summer, and unrestricted in autumn and winter.http://www.haiyangkaifayuguanli.com/hykfyglen/ch/reader/view_abstract.aspx?file_no=20240913&flag=1yueqing baydindipspatial and temporal distributioneutrophication |
| spellingShingle | YAO Kaixue YIN Rui WANG Yang CHEN Feng LI Zhenhua Distribution Characteristics of Nutrients and Eutrophication Assessment in Yueqing Bay Haiyang Kaifa yu guanli yueqing bay din dip spatial and temporal distribution eutrophication |
| title | Distribution Characteristics of Nutrients and Eutrophication Assessment in Yueqing Bay |
| title_full | Distribution Characteristics of Nutrients and Eutrophication Assessment in Yueqing Bay |
| title_fullStr | Distribution Characteristics of Nutrients and Eutrophication Assessment in Yueqing Bay |
| title_full_unstemmed | Distribution Characteristics of Nutrients and Eutrophication Assessment in Yueqing Bay |
| title_short | Distribution Characteristics of Nutrients and Eutrophication Assessment in Yueqing Bay |
| title_sort | distribution characteristics of nutrients and eutrophication assessment in yueqing bay |
| topic | yueqing bay din dip spatial and temporal distribution eutrophication |
| url | http://www.haiyangkaifayuguanli.com/hykfyglen/ch/reader/view_abstract.aspx?file_no=20240913&flag=1 |
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