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DOI | 10.1073/pnas.1912367117 |
Nitrifier adaptation to low energy flux controls inventory of reduced nitrogen in the dark ocean | |
Zhang, Yao1,2; Qin, Wei3; Hou, Lei1,2; Zakem, Emily J.4; Wan, Xianhui1; Zhao, Zihao5; Liu, Li1,2; Hunt, Kristopher A.6; Jiao, Nianzhi1,2; Kao, Shuh-Ji1,2; Tang, Kai1,2; Xie, Xiabing1; Shen, Jiaming1,2; Li, Yufang1,2; Chen, Mingming1,2; Dai, Xiaofeng1,2; Liu, Chang1,2; Deng, Wenchao1; Dai, Minhan1,2; Ingalls, Anitra E.3; Stahl, David A.6; Herndl, Gerhard J.5,7 | |
2020-03-03 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:9页码:4823-4830 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA; Austria; Netherlands |
英文摘要 | Ammonia oxidation to nitrite and its subsequent oxidation to nitrate provides energy to the two populations of nitrifying chemo-autotrophs in the energy-starved dark ocean, driving a coupling between reduced inorganic nitrogen (N) pools and production of new organic carbon (C) in the dark ocean. However, the relationship between the flux of new C production and the fluxes of N of the two steps of oxidation remains unclear. Here, we show that, despite orders-of-magnitude difference in cell abundances between ammonia oxidizers and nitrite oxidizers, the two populations sustain similar bulk N-oxidation rates throughout the deep waters with similarly high affinities for ammonia and nitrite under increasing substrate limitation, thus maintaining overall homeostasis in the oceanic nitrification pathway. Our observations confirm the theoretical predictions of a redox-informed ecosystem model. Using balances from this model, we suggest that consistently low ammonia and nitrite concentrations are maintained when the two populations have similarly high substrate affinities and their loss rates are proportional to their maximum growth rates. The stoichiometric relations between the fluxes of C and N indicate a threefold to fourfold higher C-fixation efficiency per mole of N oxidized by ammonia oxidizers compared to nitrite oxidizers due to nearly identical apparent energetic requirements for C fixation of the two populations. We estimate that the rate of chemoautotrophic C fixation amounts to similar to 1 x 10(13) to similar to 2 x 10(13) mol of C per year globally through the flux of similar to 1 x 10(14) to similar to 2 x 10(14) mol of N per year of the two steps of oxidation throughout the dark ocean. |
英文关键词 | nitrification dark ocean nitrogen flux carbon fixation homeostasis |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000518473500056 |
WOS关键词 | AMMONIA OXIDATION-KINETICS ; NITRITE-OXIDIZING BACTERIA ; COMPLETE NITRIFICATION ; NITRIFYING ARCHAEA ; ISOTOPIC ANALYSIS ; OXYGEN MINIMUM ; NITRATE ; DIVERSITY ; SEAWATER ; PACIFIC |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249745 |
专题 | 资源环境科学 |
作者单位 | 1.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361101, Peoples R China; 2.Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361101, Peoples R China; 3.Univ Washington, Sch Oceanog, Seattle, WA 98195 USA; 4.Univ Southern Calif, Dept Biol Sci, Los Angeles, CA 90089 USA; 5.Univ Vienna, Ctr Funct Ecol, Dept Limnol & Biooceanog, A-1090 Vienna, Austria; 6.Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98195 USA; 7.Univ Utrecht, Royal Netherlands Inst Sea Res, Dept Marine Microbiol & Biogeochem, NL-1790 AB Den Burg, Netherlands |
推荐引用方式 GB/T 7714 | Zhang, Yao,Qin, Wei,Hou, Lei,et al. Nitrifier adaptation to low energy flux controls inventory of reduced nitrogen in the dark ocean[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(9):4823-4830. |
APA | Zhang, Yao.,Qin, Wei.,Hou, Lei.,Zakem, Emily J..,Wan, Xianhui.,...&Herndl, Gerhard J..(2020).Nitrifier adaptation to low energy flux controls inventory of reduced nitrogen in the dark ocean.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(9),4823-4830. |
MLA | Zhang, Yao,et al."Nitrifier adaptation to low energy flux controls inventory of reduced nitrogen in the dark ocean".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.9(2020):4823-4830. |
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