Amino sugars as indicator of organic matters source and diagenesis in the surface sediments of the East China Sea

doi:10.1016/j.ecolind.2018.10.011

	Amino sugars as indicator of organic matters source and diagenesis in the surface sediments of the East China Sea
	Ren, Chengzhe1,2 ; Yuan, Huamao1,2,3 ; Song, Jinming1,2,3 ; Duan, Liqin 1,3; Li, Xuegang 1,2,3; Li, Ning 1,3; Zhou, Bu1,2
	2019-02-01
发表期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
卷号	97 页码:111-119
通讯作者	Yuan, Huamao([email protected]) ; Song, Jinming([email protected])
摘要	Amino sugars (AS) were investigated to study the source, reactivity and bacterial contribution of organic matters (OM) in surface sediments of the East China Sea (ECS) both in summer and autumn in 2016, within and after the algae bloom, respectively. The content of AS was 0.48-7.23 mu mol/(g dw) with a higher concentration in nearshore than that in offshore area and lower concentration in summer than that in autumn, which on average made up 3.65 +/- 1.66% of TOC and 4.49 +/- 1.98% of TN in the ECS surface sediments. The low average ratio of glucosamine/galactosaminc (GlcN/GalN) (1.16 +/- 0.15) indicated a major bacterial source of AS pool of the investigated area. Higher GlcN/GaIN (1.30 +/- 0.15 in summer and 1.21 +/- 0.09 in autumn) and muramic acid (Mur) (8.8 +/- 3.8 nmol/(mg C) in summer and 20.5 +/- 10.3 nmol/(mg C) in autumn) and together with lower GIcN/Mur (29 +/- 8 in summer and 16 +/- 4 in autumn) content in nearshore than those in offshore area (GIcN/ Ga1N: 1.11 +/- 0.14 in summer and 1.09 +/- 0.13 in autumn; Mur: 5.2 +/- 1.7 nmol/(mg C) in summer and 10.4 +/- 5 nmol/(mg C) in autumn; GIcN/Mur: 36 +/- 9 in summer and 34 +/- 11 in autumn) indicated more plankton detritus and a more labile nature of OM, and also relatively higher fresh bacteria contribution to OM in nearshore area, which was consistent with the higher concentrations of Chl-a in corresponding surface water. The transformation of plankton to bacteria source of OM from summer to autumn was revealed by the increased total hydrolysable amino sugars (THAS) and Mur concentration, C- and N-normalized yield of THAS, and also the decreased ratios of GIcN/GalN and GlcN/Mur in sediments in autumn. The correlation between Mur in sediments and Chl-a in surface water suggested that the real-time settling plankton detritus was one of the major food sources for benthic bacteria in summer but contributed little in autumn. Based on Mur, the relatively fresh bacteria OM contribution to TOC were 13.1% in summer and 28.5% in autumn. In summary, the composition of AS in the ECS surface sediments showed a major bacteria origin of OM and the bioavailability decreased from nearshore to offshore and also from summer to autumn. As the algae bloom decline, the flux of plankton detritus decreased and the OM source transformed from plankton to bacteria.
关键词	Amino sugars Organic matter East China Sea Surface sediment Reactivity Seasonal trend Bacteria
DOI	10.1016/j.ecolind.2018.10.011
收录类别	SCI
语种	英语
资助项目	National Key research and development Plan of Sino-Australian Centre for Healthy Coasts[2016YFE0101500]###2542; National Natural Science Foundation[U1406404]###2543; Shandong Province[U1406404]###2544; National Natural Science Foundation of China[41676068]###760; National Key research and development Plan of Sino-Australian Centre for Healthy Coasts[2016YFE0101500]; National Natural Science Foundation[U1406404]; Shandong Province[U1406404]; National Natural Science Foundation of China[41676068]
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS记录号	WOS:000464891000013
出版者	ELSEVIER SCIENCE BV
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/161153
专题	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, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, Qingdao 266071, Shandong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Qingdao Natl Lab Marine Sci & Technol, Funct Lab Marine Ecol & Environm Sci, Qingdao 266237, Shandong, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Ren, Chengzhe,Yuan, Huamao,Song, Jinming,et al. Amino sugars as indicator of organic matters source and diagenesis in the surface sediments of the East China Sea[J]. ECOLOGICAL INDICATORS,2019,97:111-119.
APA	Ren, Chengzhe.,Yuan, Huamao.,Song, Jinming.,Duan, Liqin.,Li, Xuegang.,...&Zhou, Bu.(2019).Amino sugars as indicator of organic matters source and diagenesis in the surface sediments of the East China Sea.ECOLOGICAL INDICATORS,97,111-119.
MLA	Ren, Chengzhe,et al."Amino sugars as indicator of organic matters source and diagenesis in the surface sediments of the East China Sea".ECOLOGICAL INDICATORS 97(2019):111-119.