Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO2847 |
N-2 production rates limited by nitrite availability in the Bay of Bengal oxygen minimum zone | |
Bristow, L. A.1,2,3; Callbeck, C. M.3; Larsen, M.1,2; Altabet, M. A.4; Dekaezemacker, J.3; Forth, M.1,2; Gauns, M.5; Glud, R. N.1,2; Kuypers, M. M. M.3; Lavik, G.3; Milucka, J.3; Naqvi, S. W. A.5; Pratihary, A.5; Revsbech, N. P.6; Thamdrup, B.1,2; Treusch, A. H.1,2; Canfield, D. E.1,2 | |
2017 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark; Germany; USA; India |
英文摘要 | A third or more of the fixed nitrogen lost from the oceans as N-2 is removed by anaerobic microbial processes in open ocean oxygen minimum zones. These zones have expanded over the past decades, and further anthropogenically induced expansion could accelerate nitrogen loss. However, in the Bay of Bengal there has been no indication of nitrogen loss, although oxygen levels are below the detection level of conventional methods (1 to 2 mu M). Here we quantify the abundance of microbial genes associated with N-2 production, measure nitrogen transformations in incubations of sampled seawater with isotopically labelled nitrogen compounds and analyse geochemical signatures of these processes in the water column. We find that the Bay of Bengal supports denitrifier and anammox microbial populations, mediating low, but significant N loss. Yet, unlike other oxygen minimum zones, our measurements using a highly sensitive oxygen sensor demonstrate that the Bay of Bengal has persistent concentrations of oxygen in the 10 to 200 nM range. We propose that this oxygen supports nitrite oxidation, thereby restricting the nitrite available for anammox or denitrification. If these traces of oxygen were removed, nitrogen loss in the Bay of Bengal oxygen minimum zone waters could accelerate to global significance. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394117300009 |
WOS关键词 | WATER-COLUMN ; NITROGEN LOSS ; OXIDATION ; NORTH ; SEASONALITY ; AMMONIUM ; SHELF ; CYCLE |
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/34874 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Southern Denmark, Dept Biol, DK-5230 Odense M, Denmark; 2.Univ Southern Denmark, Nord Ctr Earth Evolut NordCEE, DK-5230 Odense M, Denmark; 3.Max Planck Inst Marine Microbiol, Celsiusstr 1, D-28359 Bremen, Germany; 4.Univ Massachusetts Dartmouth, Sch Marine Sci & Technol, 706 South Rodney French Blvd, New Bedford, MA 02744 USA; 5.CSIR, Natl Inst Oceanog, Panaji 403004, Goa, India; 6.Aarhus Univ, Dept Biosci, Bldg 1540, DK-8000 Aarhus C, Denmark |
推荐引用方式 GB/T 7714 | Bristow, L. A.,Callbeck, C. M.,Larsen, M.,et al. N-2 production rates limited by nitrite availability in the Bay of Bengal oxygen minimum zone[J]. NATURE GEOSCIENCE,2017,10(1). |
APA | Bristow, L. A..,Callbeck, C. M..,Larsen, M..,Altabet, M. A..,Dekaezemacker, J..,...&Canfield, D. E..(2017).N-2 production rates limited by nitrite availability in the Bay of Bengal oxygen minimum zone.NATURE GEOSCIENCE,10(1). |
MLA | Bristow, L. A.,et al."N-2 production rates limited by nitrite availability in the Bay of Bengal oxygen minimum zone".NATURE GEOSCIENCE 10.1(2017). |
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