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Data from the DIAPICNA cruise: Diazotrophic pico-cyanobacteria in the North Atlantic open ocean: their abundance and importance as a source of new nitrogen at the Azores Current Front
Citeerbaar als data publicatie
Riou, V.; Martins A.; Dehairs, F.; Prakya S. R.; Loureiro, C.; Santos, M; Alves, A. V.; (2015): Data from the DIAPICNA cruise: Diazotrophic pico-cyanobacteria in the North Atlantic open ocean: their abundance and importance as a source of new nitrogen at the Azores Current Front. https://doi.org/10.14284/40
Contact:
Dehairs, Frank Beschikbaarheid:
 Deze dataset valt onder een Creative Commons Naamsvermelding 4.0 Internationaal-licentie.Beschrijving
The data from this dataset was collected with the R/V NRP Dom Carlos I during Cruise No. DIAPICNA-OCE-2011-V01, which aimed at unfolding the inter-linkages between N2 and CO2 fixation mediated by diazotrophs in an area of the North Atlantic Ocean where Biological N2 Fixation (BNF) is suspected to be important meer
The Azores Current region close to the Mid-Atlantic Ridge, an oligotrophic area where contrasting conditions are found at the interface between temperate and subtropical waters, was investigated from the surface to 200m depth for geochemical indicators of N2-fixation as well as for the instantaneous N2 -fixation and CO2 -fixation rates, and the presence of unicellular diazotrophic cyanobacteria (UCYN), suspected to perform most of the N2 -fixation in the area. A South-North transect including 5 geographical sampling stations was sampled to evaluate the extent of biological N2 -fixation in the Azores Current/Front system (AzC/AzF), and to detect a potential influence of the nearby iron-rich "Rainbow" deep sea hydrothermal system. The results indicate that N2-fixation would support a large part of the CO2 -fixation in the whole area, and that the UCYN abundance may not be related with N2 -fixation activity. Diapycnal diffusion of nutrients and plankton seems enhanced by the numerous eddies generated in this area, probably regulating the growth and activity of C- and N2 -fixers Scope Thema's: Watersamenstelling > Nutrienten Kernwoorden: Marien/Kust, Fytoplankton, Unicellular Cyanobacteria (UCYN), ANE, Azores Geografische spreiding ANE, Azores [Marine Regions] Spreiding in de tijd
25 Juli 2011 - 3 Augustus 2011 Parameters
Abundance of N2 fixers per size fraction Methode
Ammonium Methode Carbon uptake (primary production) Methode Dinitrogen uptake (N2 fixation) Methode Fosfaat (PO43-) Methode Nitraat (NO3-) Methode Opgeloste zuurstof Methode Particulaire organische koolstof Methode Particulate organic nitrogen (PON) Methode Saliniteit Methode Silicic acid Methode Stable C (d13C) isotopic composition of suspended organic matter Methode Stable N (d15N) isotopic composition of suspended organic matter Methode Watertemperatuur Methode Abundance of N2 fixers per size fraction: Fluorescence In Situ Hybridization (FISH) Ammonium: Colorimetry; QUAATRO analyser Ammonium: Colorimetry; QUAATRO analyser Carbon uptake (primary production): Isotope enrichment experiments Carbon uptake (primary production): Isotope enrichment experiments Dinitrogen uptake (N2 fixation): Isotope enrichment experiments Fosfaat (PO43-): Colorimetry; QUAATRO analyser Fosfaat (PO43-): Colorimetry; QUAATRO analyser Nitraat (NO3-): Colorimetry; QUAATRO analyser Nitraat (NO3-): Colorimetry; QUAATRO analyser Opgeloste zuurstof: Winkler Method Particulaire organische koolstof: Elemental Analysis Isotope Ratio Mass Spectrometry (EA-IRMS) Particulate organic nitrogen (PON): Elemental Analysis Isotope Ratio Mass Spectrometry (EA-IRMS) Saliniteit: CTD measurements Silicic acid: Colorimetry; QUAATRO analyser Stable C (d13C) isotopic composition of suspended organic matter: Elemental analyser - isotope ratio mass spectrometer Stable N (d15N) isotopic composition of suspended organic matter: Elemental analyser - isotope ratio mass spectrometer Watertemperatuur: CTD measurements Bijdrage door
Vrije Universiteit Brussel (VUB), meer, data creator
The National Center for Scientific Research; Institut National de Science de l'Univers; Centre d'Océanologie de Marseille; Mediterranean Institute of Oceanography (MIO), meer, data creator
University of the Azores (UAC), meer, data creator
Marinha Portuguesa, meer, data creator
Project
DIAPICNA: Diazotrophic pico-cyanobacteria in the North Atlantic open ocean: their abundance and importance as a source of new nitrogen at the Azores Current Front, meer
Publicatie
Gebaseerd op deze dataset
Riou, V. et al. (2016). Importance of N2-fixation on the productivity at the north-western Azores current/front system, and the abundance of diazotrophic unicellular cyanobacteria. PLoS One 11(3): e0150827. https://dx.doi.org/10.1371/journal.pone.0150827, meer
Beschrijft deze dataset
Riou, V. et al. (2011). EUROFLEETS Cruise Summary Report. Project DIAPICNA: DIAzotrophic PIco-Cyanobacteria in the North Atlantic open ocean: their abundance and importance as a source of new nitrogen at the Azores Front/Current. R/V NRP Dom Carlos I, Cruise No. DIAPICNA-OCE-2011-V01, 25/07/2011 – 03/08/2011, Horta (Portugal). Vrije Universiteit Brussel/Universidade dos Açores: Brussel, Horta. 13 pp., meer
Dataset status: Afgelopen
Data type: Data
Data oorsprong: Onderzoek: veldonderzoek
Metadatarecord aangemaakt: 2015-10-26
Informatie laatst gewijzigd: 2016-07-01
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