Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/316585
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Contribution of N2 fixation to new production and excess nitrogen in the subtropical northeast Atlantic margin |
Autor: | Benavides, M.; Arístegui, J.; Agawin, N.S.R.; Álvarez-Salgado, Xosé Antón CSIC ORCID; Álvarez-Rodríguez, Marta CSIC ORCID; Troupin, Charles CSIC ORCID | Palabras clave: | Medio Marino Centro Oceanográfico de A Coruña |
Fecha de publicación: | 2013 | Citación: | Deep-Sea Research Part I-Oceanographic Research Papers, 81. 2013: 36-48 | Resumen: | We used 15N-labeled substrates to measure dinitrogen (N2) fixation, nitrate and ammonium uptake, regeneration and associated dissolved organic nitrogen (DON) release in a coastal upwelling system (Cape Ghir, ∼31°N) and an open ocean grid (bounded between 25°–42°N and 20°W) in the Canary Current region during the summer of 2009. New production (Pnew= uptake+N2 fixation+DON released from uptake− regeneration) was higher in the upwelling than in the open ocean zone (0.126 and 0.014 µmol N L−1 h−1, respectively), while regenerated production (Preg= uptake+DON released from uptake+ regeneration) was similar in both zones (0.157 and 0.133 µmol N L−1 h−1, respectively). The resulting f-ratio (Pnew/Pnew+Preg) for the open ocean and upwelling zones was 0.08 and 0.48, respectively. The availability of nitrogen in excess of that expected from Redfield stoichiometry is generally attributed to N2 fixation. A previous study indicated that our open ocean grid zone had an excess nitrogen production rate of 40±22×1010 mol N yr−1. We revisited this budget including new dissolved organic matter and fluxes through the Strait of Gibraltar and estimated a revised nitrogen excess rate of 22±19×1010 mol N yr−1. The average volumetric rate of N2 fixation for this zone was only 1.3×10−3 nmol N L−1 d−1, indicating that its influence in Pnew and nitrogen excess production in this part of the Atlantic is negligible. | URI: | http://hdl.handle.net/10261/316585 | DOI: | 10.1016/j.dsr.2013.07.004 |
Aparece en las colecciones: | (IEO) Artículos |
Mostrar el registro completo
CORE Recommender
SCOPUSTM
Citations
15
checked on 19-may-2024
WEB OF SCIENCETM
Citations
15
checked on 23-feb-2024
Page view(s)
11
checked on 29-may-2024
Google ScholarTM
Check
Altmetric
Altmetric
Este item está licenciado bajo una Licencia Creative Commons