globalchange  > 气候变化事实与影响
DOI: 10.1002/2015GB005326
Scopus记录号: 2-s2.0-84978438784
论文题名:
Basin-wide N2 fixation in the deep waters of the Mediterranean Sea
作者: Benavides M; , Bonnet S; , Hernández N; , Martínez-Pérez A; M; , Nieto-Cid M; , Álvarez-Salgado X; A; , Baños I; , Montero M; F; , Mazuecos I; P; , Gasol J; M; , Osterholz H; , Dittmar T; , Berman-Frank I; , Arístegui J
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期:6
起始页码: 952
结束页码: 961
语种: 英语
英文关键词: diazotrophy
Scopus关键词: chlorophyll ; deep water ; euphotic zone ; nitrifying bacterium ; nitrogen fixation ; nutrition ; organic matter ; peptide ; water column ; water mass ; Mediterranean Sea
英文摘要: Recent findings indicate that N2 fixation is significant in aphotic waters, presumably due to heterotrophic diazotrophs depending on organic matter for their nutrition. However, the relationship between organic matter and heterotrophic N2 fixation remains unknown. Here we explore N2 fixation in the deep chlorophyll maximum and underneath deep waters across the whole Mediterranean Sea and relate it to organic matter composition, characterized by optical and molecular methods. Our N2 fixation rates were in the range of those previously reported for the euphotic zone of the Mediterranean Sea (up to 0.43 nmol N L−1 d−1) and were significantly correlated to the presence of relatively labile organic matter with fluorescence and molecular formula properties representative for peptides and unsaturated aliphatics and associated with the presence of more oxygenated ventilated water masses. Finally, and despite that the aphotic N2 fixation contributes largely to total water column diazotrophic activity (>50%), its contribution to overall nitrogen inputs to the basin is negligible (<0.5%). ©2016. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77841
Appears in Collections:气候变化事实与影响

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作者单位: Mediterranean Institute of Oceanography-IRD/CNRS/Aix-Marseille University, Noumea, New Caledonia; Instituto de Oceanografía y Cambio Global, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain; Instituto de Investigacións Mariñas, CSIC, Vigo, Spain; Departamento de Ecología, Instituto del Agua, Universidad de Granada, Granada, Spain; Institut de Ciències del Mar, CSIC, Barcelona, Spain; Research Group for Marine Geochemistry, Institute for Chemistry and Biology of the Marine Environment, University of Oldenburg, Oldenburg, Germany; Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Ramat Gan, Israel

Recommended Citation:
Benavides M,, Bonnet S,, Hernández N,et al. Basin-wide N2 fixation in the deep waters of the Mediterranean Sea[J]. Global Biogeochemical Cycles,2016-01-01,30(6)
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