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lefort thomasPost Doc.
Section EMI

Tel. +39 081 5833340 - +39 081 5833314
Fax: +39 081 7641355
e-mail thomaslefort(at)hotmail.com


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Research interests

Understanding the distribution of the different picoplankton groups represents a central tenet of marine microbial ecology. Centering my study on the three major groups constituting the bulk picoplankton community (size 0.2-3 m), I analyze at the single cell level the distribution of autotrophic bacteria (Synechococcus and Prochlorococcus), photosynthetic Picoeukaryotes pPeuk, and heterotrophic bacteria. For that purpose, I'm using two different strategies, the first one is based on flow cytometry combined to molecular staining for determining ataxonomic patterns in picoplankton distribution, activity, and spatio-temporal variability; and the second on microautoradiography combined with catalyzed reporter deposition-FISH (MAR-CARD-FISH) for identifying patterns in bacterial phylogenetic community structure and activity.

Journal Papers

Alonso-Sáez L, Gasol JM, Lefort T, Höfer J, Sommaruga R. (2006). Effect of Natural Sunlight on Bacterial Activity and Differential Sensitivity of Natural Bacterioplankton Groups in Northwestern Mediterranean Coastal Waters. Applied and Environmental Microbiology 72: 5806-5813.

Massana R, Unrein F, Rodríguez-Martinez R, Forn I, Lefort T, Pinhassi J, Not F. (2009). Grazing rates and functional diversity of uncultured heterotrophic flagellates. ISME J. 3(5): 588-96.

Lekunberri I, Lefort T, Romero E, Vázquez-Domínguez E, Romera-Castillo C, Marrasé C, Peters F, Weinbauer M, Gasol JM. (2010). Effects of a dust deposition event on coastal marine microbial abundance and activity, bacterial community structure and ecosystem function. Journal of Plankton Research 32, 381-396.

Ruiz-González C, Galí M, Lefort T, Cardelús C, Simó R, Gasol JM.  (2012). Annual variability in light modulation of bacterial heterotrophic activity in surface Northwestern Mediterranean waters. Limnology and Oceanography, 57(5), 1376-1388. DOI: 10.4319/lo.2012.57.5.1376

Lekunberri I, Lefort T, Cardelús C, Ruiz-González C, Marrasé C, Gasol JM. (2012). Relationship between induced phytoplankton blooms and the structure and dynamics of the free-living heterotrophic bacterial community. Marine Ecology Progress Series, 448, 23-37.

Ruiz-González C, Lefort T, Galí M, Sala M, Sommaruga R, Simó R, Gasol JM. (2012). Seasonal patterns in the sensitivity to sunlight of bacterioplankton from Mediterranean surface coastal waters. FEMS Microbiology Ecology, 79, 661-674.

Ruiz-Gonzalez C, Lefort T, Massana R, Simó R, Gasol JM. (2012). Diel changes in bulk and single-cell bacterial heterotrophic activity in winter surface waters of the Northwestern Mediterranean Sea. Limnology and Oceanography, 57, 29-42.

Galí M, Ruiz-González C, Lefort T, Gasol JM, Cardelús C, Romera-Castillo C, Simó R. (2013). Spectral irradiance dependence of sunlight effects on plankton dimethylsulfide production, Limnology and Oceanography, 58 (2), 489-504.

Lefort T, Gasol JM. (2013). Global-scale distributions of marine surface bacterioplankton groups along gradients of salinity, temperature, and chlorophyll: a meta-analysis of fluorescence in situ hybridization studies. Aquatic Microbial Ecology, 70, 111-113. DOI: 10.3354/ame01643

Lefort T, Gasol JM. (2014). Short-time scale coupling of picoplankton community structure and heterotrophic activity in winter coastal NW Mediterranean Sea. Journal of Plankton Research, 0(0): 1–16. DOI:10.1093/plankt/fbt073

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