Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2886 |
Iron-dependent nitrogen cycling in a ferruginous lake and the nutrient status of Proterozoic oceans | |
Michiels, Celine C.1,2; Darchambeau, Francois3; Roland, Fleur A. E.3; Morana, Cedric4; Lliros, Marc5,6; Garcia-Armisen, Tamara7; Thamdrup, Bo8; Borges, Alberto V.3; Canfield, Donald E.8; Servais, Pierre7; Descy, Jean-Pierre9; Crowe, Sean A.1,2 | |
2017-03-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:3 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Belgium; Spain; Denmark |
英文摘要 | Nitrogen limitation during the Proterozoic has been inferred from the great expanse of ocean anoxia under low-O-2 atmospheres, which could have promoted NO3- reduction to N-2 and fixed N loss from the ocean. The deep oceans were Fe rich (ferruginous) during much of this time, yet the dynamics of N cycling under such conditions remain entirely conceptual, as analogue environments are rare today. Here we use incubation experiments to show that a modern ferruginous basin, Kabuno Bay in East Africa, supports high rates of NO3- reduction. Although 60% of this NO3- is reduced to N-2 through canonical denitrification, a large fraction (40%) is reduced to NH4+ , leading to N retention rather than loss. We also find that NO3- reduction is Fe dependent, demonstrating that such reactions occur in natural ferruginous water columns. Numerical modelling of ferruginous upwelling systems, informed by our results from Kabuno Bay, demonstrates that NO3- reduction to NH4+ could have enhanced biological production, fuelling sulfate reduction and the development of mid-water euxinia overlying ferruginous deep oceans. This NO3- reduction to NH4+ could also have partly off set a negative feedback on biological production that accompanies oxygenation of the surface ocean. Our results indicate that N loss in ferruginous upwelling systems may not have kept pace with global N fixation at marine phosphorous concentrations (0.04-0.13 mu M) indicated by the rock record. We therefore suggest that global marine biological production under ferruginous ocean conditions in the Proterozoic eon may thus have been P not N limited. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000395791400015 |
WOS关键词 | OXYGEN-MINIMUM-ZONE ; REDUCTION ; CHEMISTRY ; OXIDATION ; AMMONIUM ; WATERS ; RESPIRATION ; PHOSPHORUS ; PACIFIC ; CARBON |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/34892 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ British Columbia, Microbiol & Immunol Dept, Vancouver, BC V6T 1Z3, Canada; 2.Univ British Columbia, Earth Ocean & Atmospher Sci Dept, Vancouver, BC V6T 1Z3, Canada; 3.Univ Liege, Chem Oceanog Unit, B-4000 Liege, Belgium; 4.Katholieke Univ Leuven, Dept Earth & Environm Sci, B-3001 Leuven, Belgium; 5.Univ Autonoma Barcelona, Dept Genet & Microbiol, E-08193 Barcelona, Spain; 6.Catholic Univ Louvain, Inst Life Sci ISV, B-1348 Louvain La Neuve, Belgium; 7.Univ Libre Bruxelles, Ecol Syst Aquat, B-1050 Brussels, Belgium; 8.Univ Southern Denmark, Nord Ctr Earth Evolut, Inst Biol, DK-5230 Odense, Denmark; 9.Univ Namur, Res Unit Environm & Evolutionary Biol URBE, B-5000 Namur, Belgium |
推荐引用方式 GB/T 7714 | Michiels, Celine C.,Darchambeau, Francois,Roland, Fleur A. E.,et al. Iron-dependent nitrogen cycling in a ferruginous lake and the nutrient status of Proterozoic oceans[J]. NATURE GEOSCIENCE,2017,10(3). |
APA | Michiels, Celine C..,Darchambeau, Francois.,Roland, Fleur A. E..,Morana, Cedric.,Lliros, Marc.,...&Crowe, Sean A..(2017).Iron-dependent nitrogen cycling in a ferruginous lake and the nutrient status of Proterozoic oceans.NATURE GEOSCIENCE,10(3). |
MLA | Michiels, Celine C.,et al."Iron-dependent nitrogen cycling in a ferruginous lake and the nutrient status of Proterozoic oceans".NATURE GEOSCIENCE 10.3(2017). |
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