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Details of  Gérald Grégori   


PERSONAL DATA

Gender male
Job title Scientist
Institution
Mediterranean Institute of Oceanography ( MIO)
163 avenue de Luminy, Case 901, TPR1 Marseille 13009
Address
163 avenue de Luminy, Case 901, Batiment OCEANOMED
Marseille
13009
Regions Sea of Azov
Tel 334486 090 515
Fax 3349486 090 544
Email
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Website http://precym.mio.univ-amu.fr/, http://mio.pytheas.univ-amu.fr/, http://www.com.univ-mrs.fr/LMGEM
Social Media Links
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PROFESSIONAL DATA

Degree PhD
Job type Research
Research Area(s) Biological Oceanography, Marine Ecology , Biological Oceanography, Marine Ecology
Research Activities I am interested in marine planktonic microbes (abundance and activity), and their relashionships with the ecosystem and the biogeochemistry. I therefore study the factors that influence their abundance and distribution along the water column. My originality is to use single cell analysis to study them, both in the lab and in situ.

Manager of the PRECYM flow cytometry platform
Research Region 2, 3, 72, 84
Working languages French; English; Italian
Skills/Expertise Marine microbial ecology, Biogeochemistry, Flow cytometry, Cell sorting, Respirometry, Field work, Data analysis
PUBLICATIONS (as reported by Gérald GRéGORI)

Vinay M., Franche N., Grégori G., Fantino J.R., Pouillot F., Ansaldi M. (2015). Phage-based fluorescent biosensor prototypes to specifically detect enteric bacteria such as E. coli and Salmonella enterica Typhimurium. PLOS ONE. (in press)
Bertrand J-C, Bonin P, Caumette P, Gattuso J-P, Grégori G, Guyoneaud R, Le Roux X, Matheron R, Poly F. Biogeochemical Cycles. In : Bertrand J-C, Caumette P, Lebaron P, Matheron R, Normand P, Sime-Ngando T, editors. Environmental Microbiology : Fundamentals and Applications : Springer Netherlands ; 2015. p 511-617
Dugenne M, Thyssen M, Garcia N, Mayot N, Bernard G, Grégori G. Monitoring of a Potential Harmful Algal Species in the Berre Lagoon by Automated In Situ Flow Cytometry. In : Ceccaldi H-J, Hénocque Y, Koike Y, Komatsu T, Stora G, Tusseau-Vuillemin M-H, editors. Marine Productivity : Perturbations and Resilience of Socio-ecosystems : Springer International Publishing ; 2015. p 117-127.
Girault M., Arakawa H., Barani A., Ceccaldi H. J. , Hashihama H. J. , and Grégori G. (2015). Heterotrophic prokaryote distribution along a 2,300 km transect in the North Pacific subtropical gyre during strong La Niña conditions : relationship between distribution and hydrological conditions. Biogeosciences. (in press)
D B?naru, F Carlotti, A Barani, G Grégori, N Neffati, M Harmelin-Vivien (2014). Seasonal variation of stable isotope ratios of size-fractionated zooplankton in the Bay of Marseille (NW Mediterranean Sea). Journal of Plankton Research 36 (1), 145-156 doi : 10.1093/plankt/fbt083
Dugenne M, Thyssen M, Nerini D, Mante C, Poggiale J, Garcia N, Garcia F and Grégori GJ (2014). Consequence of a sudden wind event on the dynamics of a coastal phytoplankton community : an insight into specific population growth rates using a single cell high frequency approach. Front. Microbiol. 5:485. doi : 10.3389/fmicb.2014.00485
Thyssen M, Grégori GJ, Grisoni J, Pedrotti M, Mousseau L, Artigas LF, Marro S, Garcia N, Passafiume O and Denis MJ(2014) Onset of the spring bloom in the northwestern Mediterranean Sea : influence of environmental pulse events on the in situ hourly-scale dynamics of the phytoplankton community structure.. Front. Microbiol. 5:387. doi:10.3389/fmicb.2014.00387
Camps M., Barani A., Grégori G., Bouchez A., Le Berre B., Bressy C., Blache Y., and Briand J. F., (2014). Antifouling coatings influence both abundance and community structure of colonizing biofilms : a case study in the North-Western Mediterranean Sea. Applied and Environmental Microbiology 80 (16), 4821-4831. DOI:10.1128/AEM.00948-14
Girault M., Arakawa H., Barani A., Ceccaldi H. J. , Hashihama H. J. , and Grégori G. (2014). Heterotrophic prokaryote distribution along a 2,300 km transect in the North Pacific subtropical gyre during strong La Niña conditions : relationship between distribution and hydrological conditions. Biogeosciences Discuss., 11, 15793-15826, doi:10.5194/bgd-11-15793-2014
Girault, M., Arakawa, H., Barani, A., Ceccaldi, H. J., Hashihama, F., Kinouchi, S., and Grégori, G. (2013) Distribution of ultraphytoplankton in the western part of the North Pacific subtropical gyre during a strong La Niña condition: relationship with the hydrological conditions, Biogeosciences, 10, 5947-5965, doi:10.5194/bg-10-5947-2013, 2013
Novo D., Grégori G., Rajwa B. (2013). Generalized unmixing model for multispectral flow cytometry utilizing non-square compensation matrices. Cytometry Part A 83A : 508-520
Grégori G., Patsekin V., Rajwa B., Jones J., Ragheb K., Holdman C., Robinson J.P. (2012). Hyperspectral cytometry at the single-cell level using a 32-channel photodetector. Cytometry Volume 81A, Issue 1, pages 35?44.
Malkassian A., Nerini D., van Dijk M.A., Thyssen M., Mante C., and Grégori G (2011). Functional Analysis and Classification of Phytoplankton Based on Data from an Automated Flow Cytometer. Cytometry part A, 79A : 263-275.
Malkassian, A., Nerini, D., Van dijk, M.A., Thyssen, M., Mante, C., Grégori, G. (2011). Functional Analysis and Classification of Phytoplankton Based on Data from an Automated Flow Cytometer. Cytometry part A 79A : 263-275.
Trigui H., Masmoudi S., Brochier-Armanet C., Barani A., Grégori G., Denis M., Dukan S., Maalej S. (2011) Characterization of heterotrophic prokaryote subgroups in the Sfax coastal solar salterns by combining flow cytometry cell sorting and phylogenetic analysis. Extremophiles, 15(3):347-58
Eichinger, M.,Sempéré, R.,Grégori, G.,Charrière, B.,Poggiale, J.C.,Lefèvre, D. (2010) Increased bacterial growth efficiency with environmental variability : results from DOC degradation by bacteria in pure culture experiments. Biogeosciences 7, 1861-1876
Van dijk, M.,Grégori, G.,Hoogveld, H.,Rijkeboer, M.,Denis, M.,Malkassian, M.,Gons, H. (2010) Optimizing the setup of a flow cytometric cell sorter for efficient quantitative sorting of long filamentous cyanobacteria. Cytometry 77A, Issue 10:905?995
Topcu, E.,Perez, T.,Grégori, G.,Harmelin, M. (2010) In situ investigation of Spongia officinalis (Demospongiae) particle feeding : coupling flow cytometry and stable isotope analysis. J. Exp. Mar. Biol. Ecol. Volume 389, Issues 1-2 : 61-69
Duhamel S., Grégori G., Van Wambeke F., and Nedoma J. (2009) Detection of extracellular phosphatase activity at the single cell level by enzyme-labelled fluorescence and flow cytometry : the importance of time kinetics in ELFA labelling. Cytometry 75A Issue 2 : 163 - 168.
Eichinger, M.,Koojman, S.,Sempéré, R.,Lefèvre, D.,Gregori, G.,Charrière, B.,Poggiale, J.C. (2009) DOC consumption and release by marine bacteria in pulsed-substrate environment : from experiments to modelling. Aquatic Microbial Ecology 56:41?54.
Duhamel S., Grégori G., Mauriac R., Van wambeke F., Nedoma J. (2008) A method for analysing phosphatase activity in aquatic bacteria at the single cell level using flow cytometry. J Microbiol Methods 75, 269?278.
Thyssen M., Tarran G.A., Zubkov M., Holland R.J., Gregori G., Burkill P.H., Denis M. (2008) The emergence of automated high frequency flow cytometry : revealing temporal and spatial phytoplankton variability. Journal of Plankton Research. 30 (3), 333-343.
B. Céa, D. Lefèvre, L. Chirurgien, P. Raimbault, N. Garcia, B. Charrière, G. Grégori, J.F. Ghiglione, A. Barani, M. Lafont, F. Van Wambeke (in press). An annual survey of bacterial production, respiration and ectoenzyme activity in coastal NW Mediterranean waters : temperature and resource controls. Environmental Science and Pollution Research.
Camps M., Barani A., Grégori G., Bouchez A., Le Berre B., Bressy C., Blache Y., and Briand J. F., (in press). Antifouling coatings influence both abundance and community structure of colonizing biofilms : a case study in the North-Western Mediterranean Sea. Applied and Environmental Microbiology
Lafabrie C., Garrido M., Leboulanger C., Cecchi P., Grégori G., Pasqualini V., Pringault O. (in press) Impact of contaminated-sediment resuspension on phytoplankton in the Biguglia lagoon (Corsica, Mediterranean Sea). Estuarine, Coastal and Shelf Science.
Trigui H., Masmoudi S., Brochier-Armanet C., Barani A., Grégori G., Denis M., Dukan S., Maalej S. (in press) Characterization of heterotrophic prokaryote subgroups in the Sfax coastal solar salterns by combining flow cytometry cell sorting and phylogenetic analysis. Extremophiles.
Banaru D., Carlotti F., Barani A., Grégori G., Neffati N., Harmelin-Vivien M. (in press) Seasonal variation of stable isotope ratios of size-fractionated zooplankton in the Bay of Marseille (NW Mediterranean Sea). Journal of Plankton Research


Created: 2011-04-26 Last Updated: 2015-07-02 by Gérald GRéGORI