Bienvenue dans l'archive ouverte du MIO - Institut Méditerranéen d’océanologie

Le M I O est un laboratoire de recherche en Océanologie des Universités d’Aix Marseille, de Toulon, du CNRS et de l’IRD. Le M I O est intégré dans l’OSU Pytheas et est partenaire du Labex OT-Med. Ses objectifs sont de mieux comprendre le système océanique et son évolution en réponse au changement global. Il constitue un pôle de compétences en biologie, écologie, biodiversité, microbiologie, halieutique, physique, chimie, biogéochimie et en sédimentologie marines. Ses cadres d’exercice sont l’océan mondial, ses interfaces avec le continent, l’atmosphère et le sédiment.
Le laboratoire est issu de la fusion des unités de recherches du Centre d’Océanologie de Marseille, du LSEET, d’un chercheur de l’IRPHE et du LMBEC

 

 

 

 

 

 

 

 

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Derniers dépôts

Articles autour de la Cytométrie en flux

 

 

La cytométrie en flux au MIO

[hal-01504969] Assessing ultraphytoplankton and heterotrophic prokaryote composition by flow cytometry in a Mediterranean lagoon  (15/02/18)  
Abstract In the eutrophic Ghar El Melh Lagoon (GML, Tunisia), the distribution of heterotrophic prokaryotes, picoand nanophytoplankton was studied at five stations in November 2012 at the single cell level, along with environmental factors. Flow cytometry analysis of ultraplankton (<10 μm) resolved (i) two heterotrophic prokaryote groups, low and high nucleic acid contents (LNA and HNA, respectively), and (ii) eight to nine ultraphytoplankton groups (cryptophyte-like cells, two nanoeukaryote subgroups, two picoeukaryote subgroups and three Synechococcus-like cells subgroups). Prochlorococcus was not detected. According to redundancy analysis (RDA), a significant difference was found in the distribution of the ultraplankton between stations (F = 2.61, p < 0.05); maximum proliferations of heterotrophic prokaryotes were observed in the inner parts of the lagoon at stations 3, 4 and 5 affected by urban, agricultural and industrial discharges. Ultraphytoplankton concentrations were the highest near the outlet of the lagoon at stations 1 and 2 influenced by freshwater outflow and oligotrophic Mediterranean water inflow, respectively. At station 1, the large ultraphytoplankton concentration derives from the high abundance of cryptophytelike cells favoured by the freshwater outflow whereas at station 2, the input of oligotrophic Mediterranean water enhanced the abundance of Synechococcus and picoeukaryotes at the expense of nanoeukaryotes. Two trophic regimes were thus differentiated in GML.

[hal-01103485] Spring plankton community structure and distribution in the north and south coasts of Sfax (Tunisia) after north coast restoration  (15/02/18)  
[hal-01638096] Combining laser diffraction, flow cytometry and optical microscopy to characterize a nanophytoplankton bloom in the Northwestern Mediterranean  (12/02/18)  
[hal-00807657] Generalized unmixing model for multispectral flow cytometry utilizing nonsquare compensation matrices  (29/01/18)  
[hal-00691181] Hyperspectral cytometry at the single-cell level using a 32-channel photodetector.  (29/01/18)  

 

 

 

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Contacts

Référent publications :
Catherine Beaussier
Tél. (+33) 4 95 04 41 43
catherine.beaussier@osupytheas.fr

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