A bacteriohopanetetrol stereoisomer in Western Pacific oxycline indicates anammox-driven nitrogen loss and warm eddy dynamics
文献类型：期刊论文
| 作者 | Duan, Liqin1,2,3,4; Song, Jinming1,2,3,4; Yin, Meiling1,3; Wang, Xiaowei3,4,5; Liu, Chuanyu3,4,5; Kan, Jiawei1,3; Wang, Zhuoyue3,4,5; Zhao, Feng3,4,6; Li, Xuegang1,2,3,4; Yuan, Huamao1,2,3,4 |
| 刊名 | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| 出版日期 | 2026-03-01 |
| 卷号 | 416页码:265-278 |
| 关键词 | Bacteriohopanetetrol isomer (BHT x ) Anammox Warm eddies Oxycline The Western Pacific |
| ISSN号 | 0016-7037 |
| DOI | 10.1016/j.gca.2026.01.025 |
| 通讯作者 | Duan, Liqin(duanliqin@qdio.ac.cn) |
| 英文摘要 | A unique bacteriohopanetetrol isomer (BHT-x) serves as a distinctive biomarker for marine anammox, a critical process in oceanic nitrogen loss. While anammox has been well-studied in extreme oxygen-deficient zones, its occurrence in moderately oxygen-deficient waters remains less explored. Here, we investigated anammox in the Western Pacific (WP) based on vertical and latitudinal distributions of the anammox-specific 16S rRNA gene (amx-16S rRNA gene) and BHT-x. Both the amx-16S rRNA gene and BHT-x were detected across the study region, indicating the presence of anammox in these moderately oxygen-deficient waters. The amx-16S rRNA gene copy numbers peaked in the oxycline or core oxygen minimum depths (OMDs; 60-100 mu mol/L O 2 ), whereas BHT-x abundance reached maxima in the core or lower OMDs, generally at greater depths. The vertical offset suggests that BHT-x produced by marine anammox bacteria in the oxycline or core OMDs is transported downward via particle association. This downward transport appears to be enhanced by warm eddies within the North Equatorial Counter Current (NECC) region. BHT-x ratios (BHT-x/total BHT) at stations outside the NECC, where hydrodynamic conditions are more stable, exhibited a stronger negative correlation with dissolved oxygen levels than at all stations combined. This confirms the utility of the BHT-x ratio as a more reliable redox proxy in marine regions with minimal eddy influence. |
| WOS关键词 | ANAEROBIC AMMONIUM OXIDATION ; OXYGEN MINIMUM ZONE ; WATER COLUMN ; OXIDIZING BACTERIA ; LADDERANE LIPIDS ; PARTICLE FLUXES ; N-2 PRODUCTION ; SEA ; BIOMARKERS ; HOPANOIDS |
| 资助项目 | National Natural Science Foundation of China[42476037] ; National Natural Science Foundation of China[41976037] ; Taishan Scholars Program[tsqn202211256] ; National Key Research and Development Program of China[2023YFE0106200] ; Shandong Provincial Natural Science Foundation[ZR2020YQ28] ; Jing-Jin-Ji Regional Integrated Environmental Improvement-National Science and Technology Major Project of Ministry of Ecology and Environment of China[2025ZD1201000] ; Jing-Jin-Ji Regional Integrated Environmental Improvement-National Science and Technology Major Project of Ministry of Ecology and Environment of China[NORC2022-09] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001689376700001 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204751]  |
| 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, Inst Oceanol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Qingdao Marine Sci & Technol Ctr, Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 6.Chinese Acad Sci, Inst Oceanol, Lab Marine Organism Taxon & Phylogeny, Qingdao, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan, Liqin,Song, Jinming,Yin, Meiling,et al. A bacteriohopanetetrol stereoisomer in Western Pacific oxycline indicates anammox-driven nitrogen loss and warm eddy dynamics[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2026,416:265-278. |
| APA | Duan, Liqin.,Song, Jinming.,Yin, Meiling.,Wang, Xiaowei.,Liu, Chuanyu.,...&Yuan, Huamao.(2026).A bacteriohopanetetrol stereoisomer in Western Pacific oxycline indicates anammox-driven nitrogen loss and warm eddy dynamics.GEOCHIMICA ET COSMOCHIMICA ACTA,416,265-278. |
| MLA | Duan, Liqin,et al."A bacteriohopanetetrol stereoisomer in Western Pacific oxycline indicates anammox-driven nitrogen loss and warm eddy dynamics".GEOCHIMICA ET COSMOCHIMICA ACTA 416(2026):265-278. |
入库方式： OAI收割
来源：海洋研究所
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