Bacteria as Passive Passengers in the Equatorial Pacific Biological Carbon Pump
文献类型：期刊论文
| 作者 | Guo, Jinqiang1,2,4,5; Yuan, Huamao3; Gao, Yao1,5; Achterberg, Eric P.4; Le Moigne, Frederic A. C.2; Kiko, Rainer4; Shen, Yuan1,5 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2026-04-10 |
| 卷号 | 53期号:8页码:10 |
| 关键词 | biological carbon pump bacteria carbon export amino acids equatorial Pacific |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2025GL119613 |
| 通讯作者 | Shen, Yuan(yuanshen@xmu.edu.cn) |
| 英文摘要 | Bacteria are important agents modulating the efficiency of the ocean's biological carbon pump (BCP). The long-standing view considers bacteria as degraders of sinking particulate organic carbon (POC), yet underappreciates their contribution to carbon export. Here, using in situ pump sampling, particle imaging, and bacterial biomarker analysis across the equatorial Pacific, we show that bacteria primarily accompany carbon flux passively, rather than actively attenuating it. Despite rapid attenuation of POC flux with depth in large sinking particles, chemical signatures suggest minimal bacterial remineralization. Nevertheless, bacterial material constituted similar to 30% of the POC flux. Bacterial-mediated POC attenuation was only similar to 35% of the bacterial POC export. Such a pattern can be explained by rapid particle sinking and steep vertical temperature gradients, which limit bacterial metabolism but facilitate bacterial biomass export. Our findings reveal that bacteria serve as passive passengers in the BCP, largely contributing to rather than attenuating carbon flux. |
| WOS关键词 | PARTICULATE ORGANIC-CARBON ; MARINE SNOW ; COMMUNITY STRUCTURE ; AMINO-ACID ; OCEAN ; MATTER ; FLUX ; SINKING ; EXPORT ; PARAMETERIZATIONS |
| 资助项目 | Fundamental Research Funds for the Central Universities[20720250002] ; National Natural Science Foundation of China[42322602] ; National Natural Science Foundation of China[42276038] ; Scientific Research Innovation Capability Support Project for Young Faculty[ZYGXQNJSKYCXNLZCXM-O3] ; German Science Foundation[KI 1387/5-1] ; German Federal Ministry of Education and Research[03G0298A] ; French Agence Nationale de la Recherche[ANR-19-MPGA-0012] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001736992300001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/204955]  |
| 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 | Shen, Yuan |
| 作者单位 | 1.Xiamen Univ, Coll Ocean & Earth Sci, Xiamen, Peoples R China 2.Univ Brest, CNRS, IRD, IFREMER,Lab Sci Environm, Plouzane, France 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao, Peoples R China 4.GEOMAR Helmholtz Ctr Ocean Res Kiel, Marine Biogeochem Div, Kiel, Germany 5.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Jinqiang,Yuan, Huamao,Gao, Yao,et al. Bacteria as Passive Passengers in the Equatorial Pacific Biological Carbon Pump[J]. GEOPHYSICAL RESEARCH LETTERS,2026,53(8):10. |
| APA | Guo, Jinqiang.,Yuan, Huamao.,Gao, Yao.,Achterberg, Eric P..,Le Moigne, Frederic A. C..,...&Shen, Yuan.(2026).Bacteria as Passive Passengers in the Equatorial Pacific Biological Carbon Pump.GEOPHYSICAL RESEARCH LETTERS,53(8),10. |
| MLA | Guo, Jinqiang,et al."Bacteria as Passive Passengers in the Equatorial Pacific Biological Carbon Pump".GEOPHYSICAL RESEARCH LETTERS 53.8(2026):10. |
入库方式： OAI收割
来源：海洋研究所
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