High hydrostatic pressure stimulates microbial nitrate reduction in hadal trench sediments under oxic conditions

doi:10.1038/s41467-024-46897-2

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地球物理与资源研究室

	High hydrostatic pressure stimulates microbial nitrate reduction in hadal trench sediments under oxic conditions
	Yang, Na 5,6,7; Lv, Yongxin 5,6,7; Ji, Mukan 4; Wu, Shiguo 3; Zhang, Yu 1,2,5,6,7
刊名	NATURE COMMUNICATIONS
	2024-03-19
卷号	15 期号:1 页码:12
DOI	10.1038/s41467-024-46897-2
英文摘要	Hadal trenches are extreme environments situated over 6000 m below sea surface, where enormous hydrostatic pressure affects the biochemical cycling of elements. Recent studies have indicated that hadal trenches may represent a previously overlooked source of fixed nitrogen loss; however, the mechanisms and role of hydrostatic pressure in this process are still being debated. To this end, we investigate the effects of hydrostatic pressure (0.1 to 115 MPa) on the chemical profile, microbial community structure and functions of surface sediments from the Mariana Trench using a Deep Ocean Experimental Simulator supplied with nitrate and oxygen. We observe enhanced denitrification activity at high hydrostatic pressure under oxic conditions, while the anaerobic ammonium oxidation - a previously recognized dominant nitrogen loss pathway - is not detected. Additionally, we further confirm the simultaneous occurrence of nitrate reduction and aerobic respiration using a metatranscriptomic dataset from in situ RNA-fixed sediments in the Mariana Trench. Taken together, our findings demonstrate that hydrostatic pressure can influence microbial contributions to nitrogen cycling and that the hadal trenches are a potential nitrogen loss hotspot. Knowledge of the influence of hydrostatic pressure on anaerobic processes in oxygenated surface sediments can greatly broaden our understanding of element cycling in hadal trenches. Hadal trenches are the deepest oceanic ecosystems, with water depth over 6000 m, and are among the least explored habitats on Earth. This research demonstrates that high hydrostatic pressure enhances denitrification activity under oxic conditions, potentially making hadal trenches fixed nitrogen loss hotpots.
资助项目	National Natural Science Foundation of China (National Science Foundation of China)[92251303] ; National Natural Science Foundation of China (National Science Foundation of China)[42122043] ; National Natural Science Foundation of China (National Science Foundation of China)[42188102] ; National Natural Science Foundation of China (National Science Foundation of China)[91951117] ; National Natural Science Foundation of China[21TQ1400201] ; Shanghai Pilot Program for Basic Research-Shanghai Jiao Tong University[2023YFC2812800] ; National Key Research and Development Program of China
WOS关键词	ORGANIC-MATTER ; DENITRIFICATION ; ANAMMOX ; COMMUNITY ; GENOME ; FUTURE ; CLASSIFICATION ; ENVIRONMENTS ; COVERAGE ; TOOLS
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:001187872900006
资助机构	National Natural Science Foundation of China (National Science Foundation of China) ; National Natural Science Foundation of China ; Shanghai Pilot Program for Basic Research-Shanghai Jiao Tong University ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/10977]
专题	深海科学研究部_深海地球物理与资源研究室
通讯作者	Zhang, Yu
作者单位	1.Shanghai Jiao Tong Univ, Yazhou Bay Inst Deepsea Sci Tech, Sanya, Peoples R China 2.Minist Nat Resources, Polar Res Inst China, Lab Polar Sci, Shanghai, Peoples R China 3.Chinese Acad Sci, Inst Deep sea Sci & Engn, Sanya, Peoples R China 4.Lanzhou Univ, Ctr Pan 3 Pole Environm, Lanzhou, Peoples R China 5.Shanghai Jiao Tong Univ, MOE Key Lab Polar Ecosyst & Climate Change, Shanghai, Peoples R China 6.Shanghai Jiao Tong Univ, Shanghai Key Lab Polar Life & Environm Sci, Shanghai, Peoples R China 7.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Yang, Na,Lv, Yongxin,Ji, Mukan,et al. High hydrostatic pressure stimulates microbial nitrate reduction in hadal trench sediments under oxic conditions[J]. NATURE COMMUNICATIONS,2024,15(1):12.
APA	Yang, Na,Lv, Yongxin,Ji, Mukan,Wu, Shiguo,&Zhang, Yu.(2024).High hydrostatic pressure stimulates microbial nitrate reduction in hadal trench sediments under oxic conditions.NATURE COMMUNICATIONS,15(1),12.
MLA	Yang, Na,et al."High hydrostatic pressure stimulates microbial nitrate reduction in hadal trench sediments under oxic conditions".NATURE COMMUNICATIONS 15.1(2024):12.