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| Nutritional status and temporal spatial variations research in the Lianyungang coastal area |
| WANG Yi-bin1,2, SHAO Shuai3, MA Yong-xing2, LIU Jun2, RAN Xiang-bin2, ZHANG Ai-jun2, ZHOU De-shan3, GUO Pei-fang1, ZANG Jia-ye2 |
1. College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China;
2. First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;
3. Marine Environmental Monitoring and Forecasting Center of Lianyungang, Lianyungang 222000, China |
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Abstract Based on the data obtained in the coastal waters of the Lianyungang coastal area in Jiangsu Province from May 2009 to January 2010, the distribution of temperature, salinity, dissolved oxygen, COD, DIN, DIP and petroleum hydrocarbons were analyzed, and the temporal spatial variations of nutrient level and organic pollution situation were evaluated using methods such as water quality standards index, eutrophication index, nutrient quality index and water organic pollution evaluation index. Combined with historical data, and the trend of major pollution elements in this area and expound the present situation of marine environment were discussed. The environment quality of sea water was better in spring and summer, while the pollution degree increased in autumn and winter in the Lianyungang coastal area. Oils were the main pollution in autumn and winter. Eutrophication and organic pollution were observed in spring and summer based on eutrophication and organic pollution evaluation indexes. And there were some similarities between the eutrophication and organic pollution spatial distribution in spring and summer. The correlation analysis suggested there was a significant positive correlation between chlorophyll a and nutrient, and between chlorophyll a and COD, while negatively correlation between chlorophyll a and dissolved oxygen (P<0.01), implying the robust correlation between the growth of plankton and the content of environmental elements. This study will provide a basic support for the development and utilization of marine resources and environmental protection in Lianyungang coastal area, and a scientific basis for marine management to carry out ecosystem management based on marine resources.
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Received: 30 March 2017
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