Articles | Volume 12, issue 21
https://doi.org/10.5194/bg-12-6515-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/bg-12-6515-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
13 Nov 2015
Research article |
| 13 Nov 2015
Production regime and associated N cycling in the vicinity of Kerguelen Island, Southern Ocean
A. J. Cavagna
CORRESPONDING AUTHOR
Analytical, Environmental and Geo-Chemistry dept. (AMGC), Earth System Sciences Research Group, Vrije Universiteit Brussel, Brussels, Belgium
F. Fripiat
Analytical, Environmental and Geo-Chemistry dept. (AMGC), Earth System Sciences Research Group, Vrije Universiteit Brussel, Brussels, Belgium
M. Elskens
Analytical, Environmental and Geo-Chemistry dept. (AMGC), Earth System Sciences Research Group, Vrije Universiteit Brussel, Brussels, Belgium
P. Mangion
Centre for Coastal Biogeochemistry Research, Southern Cross University, Lismore, Australia
L. Chirurgien
Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM110, 13288, Marseille, CEDEX 09, France
I. Closset
Sorbonne Universités, UPMC, LOCEAN Laboratory, 4 place Jussieu, 75005 Paris, France
M. Lasbleiz
Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM110, 13288, Marseille, CEDEX 09, France
L. Florez-Leiva
Program of Oceanography, University of Antioquia, Medellin, Colombia
Program of Biology, University of Magdalena, Santa Marta, Colombia
D. Cardinal
Sorbonne Universités, UPMC, LOCEAN Laboratory, 4 place Jussieu, 75005 Paris, France
K. Leblanc
Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM110, 13288, Marseille, CEDEX 09, France
C. Fernandez
Department of Oceanography, COPAS SurAustral program and Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, Chile
Sorbonne Universités, UPMC, UMR7621, Laboratoire d'Océanographie Microbienne, Observatoire Océanologique, 66650 Banyuls/mer, France
D. Lefèvre
Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM110, 13288, Marseille, CEDEX 09, France
L. Oriol
Sorbonne Universités, UPMC, UMR7621, Laboratoire d'Océanographie Microbienne, Observatoire Océanologique, 66650 Banyuls/mer, France
S. Blain
Sorbonne Universités, UPMC, UMR7621, Laboratoire d'Océanographie Microbienne, Observatoire Océanologique, 66650 Banyuls/mer, France
B. Quéguiner
Aix-Marseille Université, Université de Toulon, CNRS/INSU, IRD, MIO, UM110, 13288, Marseille, CEDEX 09, France
F. Dehairs
Analytical, Environmental and Geo-Chemistry dept. (AMGC), Earth System Sciences Research Group, Vrije Universiteit Brussel, Brussels, Belgium
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Latest update: 08 Nov 2025
Short summary
Primary production, NO3- and NH4+ uptake, and nitrification rates were measured during the KEOPS 2 cruise (austral spring 2011) in the Kerguelen Plateau area. Natural iron fertilization stimulated primary production which is much higher in the fertilized areas compared to the HNLC site. We report high rates of nitrification in the mixed layer below the euphotic zone. We conclude that high productivity in deep mixing system stimulates the N cycle by increasing both assimilation and regeneration.
Primary production, NO3- and NH4+ uptake, and nitrification rates were measured during the KEOPS...
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