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The use of amino sugars for assessing seasonal dynamics of particulate organic matter in the Yangtze River estuary
Ren, Chengzhe1,3; Yuan, Huamao1,2,4,5; Song, Jinming1,2,4,5; Duan, Liqin1,2,4,5; Li, Xuegang1,2,4,5; Li, Ning1,2,4,5; Zhou, Bu1,4
2020-03-20
Source PublicationMARINE CHEMISTRY
ISSN0304-4203
Volume220Pages:11
Corresponding AuthorYuan, Huamao(yuanhuamao@qdio.ac.cn) ; Song, Jinming(jmsong@qdio.ac.cn)
AbstractThe particulate amino sugars (PAS), organic carbon (POC) and nitrogen (PN), the chlorophyll a (Chl-a), and the heterotrophic bacterial cell count (HBC) in the Yangtze River Estuary (YRE) were determined to study the biological source, bioavailability and bacterial contribution of particulate organic matter (POM) under the influence of algal bloom during the spring and autumn of 2017. The contents of PAS were 2.6-69.6 nmol/(mg dw) and made up 5.29 +/- 2.55% of POC and 5.39 +/- 2.77% of PN. The strong positive correlations between Chl-a and POC, PN and PAS and their similar distributions indicated that phytoplankton was a major source of POM and PAS in the YRE. When algal blooms occurred, the high ratios of glucosamine to galactosamine (GlcN/GalN) (similar to 10.9) and the high carbon and nitrogen normalized yields of PAS (%PAS-POC and %PAS-PN, respectively) clearly indicated the planktonic (especially zooplankton) source of POM, although the high muramic acid (Mur) contents implying high contents of fresh bacterial organic matter (OM) were also found. Additionally, the high proportion of fresh planktonand bacterial-derived OM indicated that the POM was more labile when algal bloom occurred. In contrast, when the primary production was low, the lower %PAS-POC and GlcN/GalN ratios (< 3) in the POM demonstrated the decreased contribution of planktonic OM and the relatively elevated contribution of bacterial OM. In addition, the higher %PAS-PN and the lower DO concentrations in seawater indicated that the POM experienced some degree of degradation but was still at an early stage in the nearshore site in autumn. In spring, the Changjiang diluted water (CDW) carried considerable plankton-derived POM into the estuary and influenced the distribution of POM. In autumn, the terrestrial OM might become more bacterial-derived and had less influence on the bulk POM of the estuary. The bacterial OM estimated by the Mur accounted for an average of 10.8 +/- 3.7% and 40.5 +/- 19.1% of the POC in spring and autumn, respectively, which was approximately two times higher than the results based on the heterotrophic bacterial cell count (HBC), indicating that most of the bacterial OM in the POM was detritus. In summary, the content, source and bioavailability of POM were significantly affected by algal bloom and the CDW, and the amino sugars represent a reliable tool to indicate the source and bioavailability of POM.
KeywordAmino sugars Particulate organic matter Source Bacteria Yangtze River estuary
DOI10.1016/j.marchem.2020.103763
Indexed BySCI
Language英语
Funding ProjectKey Science and Technology Innovation Program ; Shandong Province ; Qingdao National Laboratory for Marine Science and Technology[2018SDKJ0504-1] ; Key Project of Center for Ocean Mega-Science of the Chinese Academy of Sciences[COMS2019Q12] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23050501] ; National Natural Science Foundation of China[41676068] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2016191]
WOS Research AreaChemistry ; Oceanography
WOS SubjectChemistry, Multidisciplinary ; Oceanography
WOS IDWOS:000518877700004
PublisherELSEVIER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/165865
Collection海洋生态与环境科学重点实验室
Corresponding AuthorYuan, Huamao; Song, Jinming
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
3.Zhejiang Ocean Univ, Coll Marine Sci & Technol, Zhoushan 316004, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences;  Center for Ocean Mega-Science, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ren, Chengzhe,Yuan, Huamao,Song, Jinming,et al. The use of amino sugars for assessing seasonal dynamics of particulate organic matter in the Yangtze River estuary[J]. MARINE CHEMISTRY,2020,220:11.
APA Ren, Chengzhe.,Yuan, Huamao.,Song, Jinming.,Duan, Liqin.,Li, Xuegang.,...&Zhou, Bu.(2020).The use of amino sugars for assessing seasonal dynamics of particulate organic matter in the Yangtze River estuary.MARINE CHEMISTRY,220,11.
MLA Ren, Chengzhe,et al."The use of amino sugars for assessing seasonal dynamics of particulate organic matter in the Yangtze River estuary".MARINE CHEMISTRY 220(2020):11.
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