Nonconservative behavior of dissolved molybdenum and its potential role in nitrogen cycling in the Bohai and Yellow Seas

doi:10.3389/fmars.2022.1094846

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

	Nonconservative behavior of dissolved molybdenum and its potential role in nitrogen cycling in the Bohai and Yellow Seas
	Fan, Jinqi 1,2,3,4; Duan, Liqin 1,2,3,4; Yin, Meiling 1,2,3,4; Yuan, Huamao 1,2,3,4; Li, Xuegang 1,2,3,4
刊名	FRONTIERS IN MARINE SCIENCE
	2022-12-14
卷号	9 页码:14
关键词	dissolved molybdenum nonconservative behavior biological uptake N-2 fixation nitrate reduction
DOI	10.3389/fmars.2022.1094846
通讯作者	Duan, Liqin(duanliqin@qdio.ac.cn)
英文摘要	Molybdenum plays an important role in marine biological activity, especially in nitrogen cycling as a cofactor for N-2 fixation and nitrate reductase. However, the dissolved Mo (dMo) behavior and its interaction with N cycling in the coastal waters is still unclear. In this study, the dMo concentrations and parameters related to Mo distribution and N cycling in surface and bottom seawaters of the Bohai (BS) and Yellow Seas (YS) were examined. The results showed that dMo concentrations ranged from 36.4 nmol L-1 to 125.0 nmol L-1, most of which deviated significantly from the conservative line, indicating nonconservative behavior of Mo relative to salinity. The highest dMo concentrations occurring in 36 degrees N section of north of the South YS (SYS), were close to conservative value (105 nmol L-1). Significant depletion up to 40-50 nmol L-1 of dMo mainly appeared in the BS, NYS and south of the SYS, suggesting the possible removal of dMo by biological utilization and particle adsorption. Particularly, the increasing dMo concentrations away the Yellow River estuary indicated that freshwater dilution was one of reasons for dMo distributions in the BS. The similar spatial distribution of dMo and dissolved Mn concentrations suggested the possible scavenging by MnOx phases for Mo removal. The negative correlation between dMo and chlorophyll-a (Chl-a) concentrations in surface seawaters suggested that biological uptake was involved in dMo removal. The depleted dMo in most of sites corresponded with the higher nitrite concentrations, implying the possible involvement of nitrate reduction process. Although the highest N-2 fixation rates and relative abundances of cyanobacteria appeared in 36 degrees N section, corresponding with the conservative dMo, suggesting that Mo may play a minor role in N-2 fixation process there. The ten-folds of relative abundance of bacteria with nitrate reduction function than that with N-2 fixation function suggested that dMo seems to play more important role in nitration reduction than nitrogen fixation in the BS and YS.
资助项目	National Natural Science Foundation of China[41976037] ; National Natural Science Foundation of China[41906035] ; Shandong Provincial Natural Science Foundation[ZR2020YQ28] ; Taishan Scholars Program, Wenhai Program of QNLM[2021WHZZB0903] ; Yantai Double Hundred Plan funding project ; NSFC Shiptime Sharing Project[42049901]
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000904782400001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/181381]
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	Duan, Liqin
作者单位	1.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Fan, Jinqi,Duan, Liqin,Yin, Meiling,et al. Nonconservative behavior of dissolved molybdenum and its potential role in nitrogen cycling in the Bohai and Yellow Seas[J]. FRONTIERS IN MARINE SCIENCE,2022,9:14.
APA	Fan, Jinqi,Duan, Liqin,Yin, Meiling,Yuan, Huamao,&Li, Xuegang.(2022).Nonconservative behavior of dissolved molybdenum and its potential role in nitrogen cycling in the Bohai and Yellow Seas.FRONTIERS IN MARINE SCIENCE,9,14.
MLA	Fan, Jinqi,et al."Nonconservative behavior of dissolved molybdenum and its potential role in nitrogen cycling in the Bohai and Yellow Seas".FRONTIERS IN MARINE SCIENCE 9(2022):14.