Vertical variations of bacteriohopanepolyols near the Changjiang Estuary waters: Implications for marine hypoxia and bacterial activities

doi:10.1016/j.chemgeo.2024.122013

	Vertical variations of bacteriohopanepolyols near the Changjiang Estuary waters: Implications for marine hypoxia and bacterial activities
	Yin, Meiling 1,2,3,4; Duan, Liqin 1,2,3,4; Song, Jinming1,2,3,4 ; Kan, Jiawei 1,2,3,4; Yuan, Huamao 1,2; Li, Xuegang 1,2,3,4; Wang, Yingxia 1,5
	2024-04-20
发表期刊	CHEMICAL GEOLOGY
ISSN	0009-2541
卷号	651 页码:14
通讯作者	Duan, Liqin([email protected]) ; Song, Jinming([email protected])
摘要	Bacteriohopanepolyols (BHPs) are widespread in bacteria and are used as lipid biomarkers for specific bacterial activities and environmental changes. However, deposition and degradation dynamics of BHPs are still poorly constrained in marine settings, thereby affecting their reliability as biomarkers. Here, we investigated BHPs in the water columns and sediments near the Changjiang Estuary to evaluate their origins, preservation and responses to seawater hypoxia and bacterial activities. Results indicated that bacteriohopanetetrol stereoisomer (BHT-isomer) in this area was predominantly BHT-x produced by Ca. Scalindua, present in hypoxic bottom seawater. 2-Methyl BHT and nitrogen-fixing cyanobacteria showed similar vertical distribution in the water column, as did amnio-BHPs (aminotetrol and aminopentol) and the aerobic methane oxidation (AMO) gene pmoA. 2-Methyl BHT, aminotetrol and aminopentol were thought to primarily derive from cyanobacteria and aerobic methanotrophs in seawater, respectively, despite other potential sources. Depth profiles suggest that insitu production in sediments is not a major contribution to sedimentary BHPs, compared to the export and deposition from the water column. The abundances of unsaturated BHT and amino-BHPs in surface sediments were decreased compared with those in the water column, indicating that unsaturated BHT and amino-BHPs appear to undergo a certain degree of early diagenetic degradation. BHT-isomer and 2-Methyl BHT preserved preferentially over amino-BHPs. Additionally, BHT-isomer significantly correlated with anammox functional gene amx-16S rRNA, and 2-Methyl BHT significantly correlated with nitrogen-fixing functional gene nifH. This indicated that BHT-isomer and 2-Methyl BHT are suitable as biomarkers for anammox and cyanobacterial nitrogen fixation. The BHT-isomer ratio accurately reflects the situation in the water column and appears to be a very appropriate proxy for hypoxia. Conversely, sedimentary aminotetrol and aminopentol underestimate the importance of aerobic methane oxidation in seawater, as these are more rapidly degraded upon deposition to the sea floor.
关键词	Bacteriohopanepolyols (BHPs) Preservation Seawater hypoxia Anammox Functional genes The Changjiang Estuary waters
DOI	10.1016/j.chemgeo.2024.122013
收录类别	SCI
语种	英语
资助项目	Taishan Scholars Program[tsqn202211256]; Shandong Provincial Natural Science Foundation[ZR2020YQ28]; National Natural Science Foundation of China[41976037]; National Key Research and Development Program of China[2023YFE0106200]; Laoshan Laboratory Science and Technology Innovation Project[LSKJ202205003]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23050501]; Yantai Double Hundred Plan Funding Project; Open research cruise of the National Natural Science Foundation of China[NORC2020-03]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001202515500001
出版者	ELSEVIER
WOS关键词	ORGANIC-MATTER ; 2-METHYLHOPANOID PRODUCTION ; METHANOTROPHIC BACTERIA ; LIPID BIOMARKER ; HOPANOIDS ; SEA ; AMMONIUM ; COLUMN ; PRESERVATION ; OXIDATION
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/185134
专题	海洋生态与环境科学重点实验室
通讯作者	Duan, Liqin; Song, Jinming
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Laoshan Lab, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Publ Technol Serv Ctr, Qingdao 266071, Peoples R China
第一作者单位	海洋生态与环境科学重点实验室
通讯作者单位	海洋生态与环境科学重点实验室
推荐引用方式 GB/T 7714	Yin, Meiling,Duan, Liqin,Song, Jinming,et al. Vertical variations of bacteriohopanepolyols near the Changjiang Estuary waters: Implications for marine hypoxia and bacterial activities[J]. CHEMICAL GEOLOGY,2024,651:14.
APA	Yin, Meiling.,Duan, Liqin.,Song, Jinming.,Kan, Jiawei.,Yuan, Huamao.,...&Wang, Yingxia.(2024).Vertical variations of bacteriohopanepolyols near the Changjiang Estuary waters: Implications for marine hypoxia and bacterial activities.CHEMICAL GEOLOGY,651,14.
MLA	Yin, Meiling,et al."Vertical variations of bacteriohopanepolyols near the Changjiang Estuary waters: Implications for marine hypoxia and bacterial activities".CHEMICAL GEOLOGY 651(2024):14.