The use of amino sugars for assessing seasonal dynamics of particulate organic matter in the Yangtze River estuary

doi:10.1016/j.marchem.2020.103763

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋生态与环境科学重点实验室

	The use of amino sugars for assessing seasonal dynamics of particulate organic matter in the Yangtze River estuary
	Ren, Chengzhe 1,4; Yuan, Huamao 1,2,3,5; Song, Jinming 1,2,3,5; Duan, Liqin 1,2,3,5; Li, Xuegang 1,2,3,5; Li, Ning 1,2,3,5; Zhou, Bu 1,3
刊名	MARINE CHEMISTRY
	2020-03-20
卷号	220 页码:11
关键词	Amino sugars Particulate organic matter Source Bacteria Yangtze River estuary
ISSN号	0304-4203
DOI	10.1016/j.marchem.2020.103763
通讯作者	Yuan, Huamao(yuanhuamao@qdio.ac.cn) ; Song, Jinming(jmsong@qdio.ac.cn)
英文摘要	The 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.
资助项目	Key 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研究方向	Chemistry ; Oceanography
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000518877700004
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/165864]
专题	海洋研究所_海洋生态与环境科学重点实验室
通讯作者	Yuan, Huamao; Song, Jinming
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Zhejiang Ocean Univ, Coll Marine Sci & Technol, Zhoushan 316004, Peoples R China 5.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China
推荐引用方式 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.