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DOI	10.1016/j.marpolbul.2020.111594
	Fractions and mineralization potential of the sediment organic nitrogen in Daya Bay; South China Sea: Anthropogenic influence and ecological implications
	Wu Y.; Gan M.; Huang X.; Jiang Z.; Liu S.
发表日期	2020
ISSN	0025326X
卷号	160
英文摘要	Nitrogen mineralization is a critical biogeochemical process that transfers organic nitrogen into inorganic forms using heterotrophic microorganisms. However, few studies have focused on this potential nutrient supplier. In this study, the composition of sediment organic nitrogen (SON) was studied, and nitrogen mineralization flux entering the water column was quantified. The results indicate that acid-hydrolyzable nitrogen (AHN) accounts for more than 40% of the SON, especially in the riverine input and marine aquaculture areas, which had significantly higher concentrations than the bay mouth area. Similar results were found for the ammonium nitrogen (AN), amino-sugar nitrogen (ASN), the total hydrolyzable amino acid (THAA), and unidentified hydrolyzable nitrogen (HUN). The mineralization rate in the marine aquaculture area was as high as 9.03 ± 1.33 mg·kg−1·d−1, while those of the riverine input (4.77 ± 1.55 mg·kg−1·d−1) and bay mouth (5.12 ± 1.42 mg·kg−1·d−1) areas were lower. The SON fractions, including the AHN, AN, ASN, and AAN, could obviously affect the mineralization of the SON. However, the extracellular enzymes, including proteinase and urease, are the predominant factors controlling the SON mineralization process. Anthropogenic activities, including riverine input and marine aquaculture, exert significant influences on the fractions and mineralization of the SON, and thus, they may increase the amount of dissolved inorganic nitrogen in the bottom of the water column in Daya Bay. © 2020 Elsevier Ltd
英文关键词	Anthropogenic effects; Fractions; Mineralization; Sediment organic nitrogen
语种	英语
scopus关键词	Aquaculture; Enzymes; Nitrogen; Anthropogenic activity; Anthropogenic influence; Biogeochemical process; Dissolved inorganic nitrogens; Extracellular enzymes; Mineralization potential; Mineralization process; Nitrogen mineralization; Mineralogy; acid hydrolyzable nitrogen; amino acid; amino sugar nitrogen; ammonia; ammonium nitrogen; nitrogen; organic nitrogen; proteinase; sea water; unclassified drug; urease; nitrogen; anthropogenic effect; coastal sediment; enzyme; marine pollution; mineralization; organic nitrogen; quantitative analysis; sediment pollution; water column; aquaculture; Article; chemical composition; concentration (parameter); correlation analysis; enzyme activity; marine environment; nitrogen mineralization; nutrient loading; oxidation reduction potential; sediment; South China Sea; water sampling; bay; China; environmental monitoring; sediment; China; Daya Bay; Guangdong; Pacific Ocean; South China Sea; Aquaculture; Bays; China; Environmental Monitoring; Geologic Sediments; Nitrogen
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/148581
作者单位	Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China; Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou, 510301, China; Sichuan Academy of Environmental Science, Chengdu, 610041, China; University of Chinese Academy of Sciences, Beijing, 100049, China
推荐引用方式 GB/T 7714	Wu Y.,Gan M.,Huang X.,et al. Fractions and mineralization potential of the sediment organic nitrogen in Daya Bay; South China Sea: Anthropogenic influence and ecological implications[J],2020,160.
APA	Wu Y.,Gan M.,Huang X.,Jiang Z.,&Liu S..(2020).Fractions and mineralization potential of the sediment organic nitrogen in Daya Bay; South China Sea: Anthropogenic influence and ecological implications.Marine Pollution Bulletin,160.
MLA	Wu Y.,et al."Fractions and mineralization potential of the sediment organic nitrogen in Daya Bay; South China Sea: Anthropogenic influence and ecological implications".Marine Pollution Bulletin 160(2020).