Origin and Dynamics of Dissolved Organic Matter in a Mariculture Area Suffering From Summertime Hypoxia and Acidification
Zhang, Yong; Gao, Xuelu; Guo, Weidong; Zhao, Jianmin; Li, Yanfang
Source PublicationFRONTIERS IN MARINE SCIENCE
2018-09-27
Volume5Pages:UNSP 325
Keywordmariculture hypoxia acidification dissolved organic carbon chromophoric dissolved organic matter Northern Yellow Sea
MOST Discipline CatalogueEnvironmental Sciences & Ecology ; Marine & Freshwater Biology
DOI10.3389/fmars.2018.00325
Contribution Rank[Zhang, Yong] Shandong Univ, Inst Marine Sci & Technol, Dept Marine Chem, Qingdao, Peoples R China; [Zhang, Yong; Gao, Xuelu; Zhao, Jianmin; Li, Yanfang] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Environm Remediat, Yantai, Peoples R China; [Gao, Xuelu] Univ Chinese Acad Sci, Dept Marine Chem, Beijing, Peoples R China; [Guo, Weidong] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen, Peoples R China
Department海岸带信息集成与综合管理实验室
AbstractBased on six cruises from March to September in 2016, we investigated monthly distributions of dissolved organic matter (DOM) and ancillary water chemistry parameters in a mariculture area in the Northern Yellow Sea, where summertime hypoxia and seawater acidification were observed. The most severe oxygen depletion (hypoxia covered approximately one-third of the aquaculture area) and the largest pH decrease (8.07 +/- 0.05 in surface layer vs. 7.66 +/- 0.07 in bottom layer) were revealed in August. Concentration of dissolved organic carbon (DOC) and the absorption properties of chromophoric DOM (CDOM) were used to characterize DOM. Results showed that DOM mainly originated from marine in situ processes. In March, a DOM pool with the lowest DOC concentration of 211 +/- 23 mu mol L-1 and nearly uniform optical characteristics were presented in the well-mixed water column. In August, however, DOC increased to 361 +/- 29 mu mol L-1 in the surface layer and 342 +/- 25 mu mol L-1 in the bottom layer. Two non-linear relationships between the absorption coefficient at 355 nm [a(CDOM)(355)] and the absorption spectral slope over 275-295 nm (S275-295) were revealed. According to modeling results, the non-linear relationships were mostly caused by the conservative mixing of a refractory CDOM pool with a freshly produced CDOM pool. Apparent oxygen utilization in August was positively related to DOC, but not to acoom(355) and S-275(-2)95, presumably due to multiple sources of CDOM in bottom waters. Both a(CDOM)(355) and S275-295 respond largely to decreasing pH; however, they would be less affected by ocean acidification since this process leads to a limited pH decline.
SubtypeArticle
Indexed BySCI
Language英语
WOS KeywordEAST CHINA SEA ; COASTAL WATERS ; YELLOW SEA ; MICROBIAL TRANSFORMATION ; ABSORPTION-COEFFICIENTS ; GLOBAL DISTRIBUTION ; OPTICAL-PROPERTIES ; MOLECULAR-WEIGHT ; SISHILI BAY ; CDOM
WOS Research AreaEnvironmental Sciences ; Marine & Freshwater Biology
WOS IDWOS:000457237800001
Funding OrganizationStrategic Priority Research Program of the Chinese Academy of Sciences [XDA11020702] ; National Natural Science Foundation of China [91751207] ; Fundamental Research Funds of Shandong University
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/24533
Collection中科院海岸带环境过程与生态修复重点实验室_海岸带信息集成与战略规划研究中心
Affiliation1.Shandong Univ, Inst Marine Sci & Technol, Dept Marine Chem, Qingdao, Peoples R China;
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Environm Remediat, Yantai, Peoples R China;
3.Univ Chinese Acad Sci, Dept Marine Chem, Beijing, Peoples R China;
4.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yong,Gao, Xuelu,Guo, Weidong,et al. Origin and Dynamics of Dissolved Organic Matter in a Mariculture Area Suffering From Summertime Hypoxia and Acidification[J]. FRONTIERS IN MARINE SCIENCE,2018,5:UNSP 325.
APA Zhang, Yong,Gao, Xuelu,Guo, Weidong,Zhao, Jianmin,&Li, Yanfang.(2018).Origin and Dynamics of Dissolved Organic Matter in a Mariculture Area Suffering From Summertime Hypoxia and Acidification.FRONTIERS IN MARINE SCIENCE,5,UNSP 325.
MLA Zhang, Yong,et al."Origin and Dynamics of Dissolved Organic Matter in a Mariculture Area Suffering From Summertime Hypoxia and Acidification".FRONTIERS IN MARINE SCIENCE 5(2018):UNSP 325.
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