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Seasonal and spatial variations in nutrients under the influence of natural and anthropogenic factors in coastal waters of the northern Yellow Sea, China. 2022

Xiyan Sun, and Zhijun Dong, and Wenjing Zhang, and Xiaohong Sun, and Chaowei Hou, and Yongliang Liu, and Chen Zhang, and Lei Wang, and Yujue Wang, and Jianmin Zhao, and Lingxin Chen
Muping Coastal Environmental Research Station, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, P.R. China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, Shandong 266071, PR China; Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, PR China.

Analysis of the common and most influential natural and anthropogenic activities on the spatiotemporal variation in nutrients at a multiannual scale is important. Eleven cruises from 2015 to 2017 were carried out to better elucidate the seasonal and spatial variations in nutrients, as well as the impact factors on dissolved inorganic nitrogen (DIN), phosphorus (DIP) and silicate (DSi). Both nutrient concentrations and forms showed similar and significant seasonal variations over the 3 years, and were closely related to the biomass and species of phytoplankton. Terrestrial inputs had significant effects on the spatial distribution of nutrients throughout the year, especially in the surface water, which showed DIN > DIP>DSi. In summer, shellfish aquaculture and hypoxia jointly affected the spatial distribution of nutrients. The bottom water nutrient concentrations in the aquaculture area were 1.1-2.3 times higher than those outside of the aquaculture area. Seasonal hypoxia can increase the release of DSi and NH4+ from the sediment to the water. In summary, anthropogenic activities and physical conditions jointly influenced the nutrient distributions.

UI MeSH Term Description Entries
D009584 Nitrogen An element with the atomic symbol N, atomic number 7, and atomic weight [14.00643; 14.00728]. Nitrogen exists as a diatomic gas and makes up about 78% of the earth's atmosphere by volume. It is a constituent of proteins and nucleic acids and found in all living cells.
D010758 Phosphorus A non-metal element that has the atomic symbol P, atomic number 15, and atomic weight 31. It is an essential element that takes part in a broad variety of biochemical reactions. Black Phosphorus,Phosphorus-31,Red Phosphorus,White Phosphorus,Yellow Phosphorus,Phosphorus 31,Phosphorus, Black,Phosphorus, Red,Phosphorus, White,Phosphorus, Yellow
D002681 China A country spanning from central Asia to the Pacific Ocean. Inner Mongolia,Manchuria,People's Republic of China,Sinkiang,Mainland China
D004784 Environmental Monitoring The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment. Monitoring, Environmental,Environmental Surveillance,Surveillance, Environmental
D000078622 Nutrients Various components of food that are required for nourishment. Macronutrients,Macronutrient,Nutrient
D000087602 Anthropogenic Effects Environmental alterations resulting from human activities. Anthropogenic Activities,Anthropogenic Disturbance,Anthropogenic Effect,Anthropogenic Factors,Anthropogenic Impact,Anthropogenic Impacts,Anthropogenic Pressure,Anthropogenic Pressures,Anthropogenic Stressor,Anthropogenic Stressors,Human Impact,Human Impacts,Activities, Anthropogenic,Activity, Anthropogenic,Anthropogenic Activity,Anthropogenic Disturbances,Anthropogenic Factor,Disturbance, Anthropogenic,Disturbances, Anthropogenic,Effect, Anthropogenic,Effects, Anthropogenic,Factor, Anthropogenic,Factors, Anthropogenic,Impact, Anthropogenic,Impact, Human,Impacts, Anthropogenic,Impacts, Human,Pressure, Anthropogenic,Pressures, Anthropogenic,Stressor, Anthropogenic,Stressors, Anthropogenic
D012621 Seasons Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Seasonal Variation,Season,Seasonal Variations,Variation, Seasonal,Variations, Seasonal
D012623 Seawater The salinated water of OCEANS AND SEAS that provides habitat for marine organisms. Sea Water,Sea Waters,Seawaters,Water, Sea,Waters, Sea

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