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Melilotus Thyssen

41
Documents

Presentation

I am a marine microbiologist and biogeochemist, dealing with the multiparametric complexity of the ocean and the microorganisms floating inside.I am looking at the very small scales related to phytoplankton organisms, as far as we can. Meaning I study all together their functional diversity (regarding their role in biogeochemical processes), their structural diversity (how the functional groups or species are making a community), and most of all, the dynamical behavior of each entity within the community (hourly to daily physiological changes and abundances variations), surrounded by water in motion. The use of high resolution automated sensors capable of precise single cell observation that can give insight to phytoplankton functional and structural heterogeneity within spatial and temporal variability is part of my job. I use automated flow cytometry in combination with several sensors deciphering the surrounding chemical and physical conditions. I am singularly looking into the very fast reactivity of the smallest phytoplankton size classes (pico-nanophytoplankton) after drastic environmental changes (as an example, after the upper layer mixing linked to strong winds), especially in the oligotrophic regions where low productivity is expected. I also collect basin scale high resolution phytoplankton distribution to understand large scale seasonal changes in hydrological properties affecting phytoplankton community structure and spatial heterogeneity. From the tiny single cell observation at high resolution (km scale/hourly scale) to the large scale observation increases datasets quality and our potential of undertanding. Combination with remote sensing (PHYSAT for example) and modelling will increase the sensitivity of extrapolation and sharpen our understanding.

Publications

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Ultraphytoplankton community structure in subsurface waters along a North-South Mediterranean transect

Ismail Boudriga , Melilotus Thyssen , Amel Zouari , Nicole Garcia , Marc Tedetti et al.
Marine Pollution Bulletin, 2022, 182, pp.113977. ⟨10.1016/j.marpolbul.2022.113977⟩
Journal articles hal-03751182v1
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Pulsed export of carbon in the north-western Mediterranean Sea

Michel Denis , Dominique Lefevre , Melilotus Thyssen , Ian Jenkinson , Gérald Grégori et al.
Chinese Journal of Oceanology and Limnology, 2022, ⟨10.1007/s00343-022-2026-0⟩
Journal articles hal-03825163v1
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Automatic recognition of flow cytometric phytoplankton functional groups using convolutional neural networks

Robin Fuchs , Melilotus Thyssen , Véronique Creach , Mathilde Dugenne , Lloyd Izard et al.
Limnology and Oceanography: Methods, 2022, ⟨10.1002/lom3.10493⟩
Journal articles hal-03688058v1
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Measuring vertical velocities with ADCPs in low-energy ocean

Caroline Comby , Stéphanie Barrillon , Jean-Luc Fuda , Andrea M. Doglioli , Roxane Tzortzis et al.
Journal of Atmospheric and Oceanic Technology, 2022, 39 (11), pp.1669-1684. ⟨10.1175/JTECH-D-21-0180.1⟩
Journal articles hal-03746757v1
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Surface ocean microbiota determine cloud precursors

Karine Sellegri , Alessia Nicosia , Evelyn Freney , Julia Uitz , Melilotus Thyssen et al.
Scientific Reports, 2021, 11, ⟨10.1038/s41598-020-78097-5⟩
Journal articles hal-03107746v1
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Mediterranean nascent sea spray organic aerosol and relationships with seawater biogeochemistry

Evelyn Freney , Karine Sellegri , Alessia Nicosia , Jonathan Trueblood , Matteo Rinaldi et al.
Atmospheric Chemistry and Physics, 2021, 18, pp.2301-2323. ⟨10.5194/acp-21-10625-2021⟩
Journal articles hal-03115302v1
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Long distance particle transport to the central Ionian Sea

Léo Berline , Andrea M. Doglioli , Anne Petrenko , Stéphanie Barrillon , Boris Espinasse et al.
Biogeosciences, 2021, ⟨10.5194/bg-18-6377-2021⟩
Journal articles hal-03436100v2
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Impact of moderately energetic fine-scale dynamics on the phytoplankton community structure in the western Mediterranean Sea

Roxane Tzortzis , Andrea M. Doglioli , Stéphanie Barrillon , A. A Petrenko , Francesco d'Ovidio et al.
Biogeosciences, 2021, 18 (24), pp.6455-6477. ⟨10.5194/bg-18-6455-2021⟩
Journal articles hal-03485758v1
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Mercury stable isotopes constrain atmospheric sources to the ocean

Martin Jiskra , Lars-Eric Heimbürger-Boavida , Marie-Maëlle Desgranges , Mariia V Petrova , Aurélie Dufour et al.
Nature, 2021, 597 (7878), pp.678 - 682. ⟨10.1038/s41586-021-03859-8⟩
Journal articles hal-03517340v1
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A two-component parameterization of marine ice-nucleating particles based on seawater biology and sea spray aerosol measurements in the Mediterranean Sea

Jonathan Trueblood , Alessia Nicosia , Anja Engel , Birthe Zäncker , Matteo Rinaldi et al.
Atmospheric Chemistry and Physics, 2021, 21 (6), pp.4659-4676. ⟨10.5194/acp-21-4659-2021⟩
Journal articles hal-03203880v1
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Vertical motions and their effects on a biogeochemical tracer in a cyclonic structure finely observed in the Ligurian Sea

Louise Rousselet , A. M. Doglioli , Alain de Verneil , Alice Pietri , Alice Della Penna et al.
Journal of Geophysical Research. Oceans, 2019, 124 (6), pp.3561-3574. ⟨10.1029/2018JC014392⟩
Journal articles hal-02124795v2
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Coupling physics and biogeochemistry thanks to high-resolution observations of the phytoplankton community structure in the northwestern Mediterranean Sea

Pierre Marrec , Gérald Grégori , Andrea M. Doglioli , Mathilde Dugenne , Alice Della Penna et al.
Biogeosciences, 2018, 15 (5), pp.1579 - 1606. ⟨10.5194/bg-15-1579-2018⟩
Journal articles hal-01735426v1
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Combining laser diffraction, flow cytometry and optical microscopy to characterize a nanophytoplankton bloom in the Northwestern Mediterranean

R. Leroux , Gérald Grégori , F Carlotti , Karine Leblanc , Melilotus Thyssen et al.
Progress in Oceanography, 2018, 163, pp.248-259. ⟨10.1016/j.pocean.2017.10.010⟩
Journal articles hal-01638096v1
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Nanoplanktonic diatoms are globally overlooked but play a role in spring blooms and carbon export

Karine Leblanc , Bernard Queguiner , Frederic Diaz , Veronique Cornet , Mónica Michel-Rodriguez et al.
Nature Communications, 2018, 9 (1), pp.953. ⟨10.1038/s41467-018-03376-9⟩
Journal articles hal-02006275v1
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Evolution of the scattering properties of phytoplankton cells from flow cytometry measurements

William Moutier , Lucile Duforêt-Gaurier , Melilotus Thyssen , Hubert Loisel , Xavier Meriaux et al.
PLoS ONE, 2017, 12 (7), ⟨10.1371/journal.pone.0181180⟩
Journal articles hal-01622002v1
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High-resolution analysis of a North Sea phytoplankton community structure based on in situ flow cytometry observations and potential implication for remote sensing

M. Thyssen , S. Alvain , A. Lefèbvre , D. Dessailly , M. Rijkeboer et al.
Biogeosciences, 2015, 12 (13), pp.4051-4066. ⟨10.5194/bg-12-4051-2015⟩
Journal articles hal-01769437v1

Determination of backscattering cross section of individual particles from cytometric measurements: a new methodology.

Lucile Duforêt-Gaurier , William Moutier , Natacha Guiselin , Melilotus Thyssen , G Dubelaar et al.
Optics Express, 2015, 23 (24), pp.31510-33. ⟨10.1364/OE.23.031510⟩
Journal articles hal-01274882v1

High spatial variability of phytoplankton assessed by flow cytometry,in a dynamic productive coastal area, in spring: The eastern English Channel

Simon Bonato , Urania Christaki , Alain Lefebvre , Fabrice Lizon , Melilotus Thyssen et al.
Estuarine, Coastal and Shelf Science, 2015, 154, pp.214-223. ⟨10.1016/j.ecss.2014.12.037⟩
Journal articles hal-01126769v1
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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

Mathilde Dugenne , Melilotus Thyssen , David Nerini , Claude Manté , Jean-Christophe Poggiale et al.
Frontiers in Microbiology, 2014, 5, ⟨10.3389/fmicb.2014.00485⟩
Journal articles hal-01146092v1
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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

Melilotus Thyssen , Gérald Grégori , Jean-Michel Grisoni , Maria-Luiza Pedrotti , Laure Mousseau et al.
Frontiers in Microbiology, 2014, 5, pp.387. ⟨10.3389/fmicb.2014.00387⟩
Journal articles hal-01321252v1
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Effects of enhanced temperature and ultraviolet B radiation on a natural plankton community of the Beagle Channel (southern Argentina): a mesocosm study

S. Moreau , B. Mostajir , G. O. Almandoz , S. Demers , M. Hernando et al.
Aquatic Microbial Ecology, 2014, 72 (2), pp.156-174. ⟨10.3354/ame01694⟩
Journal articles hal-01438442v1

Spectral fluorometric characterization of Haptophyte dynamics using the FluoroProbe : an application in the Eastern English Channel for monitoring Phaeocystis globosa.

Emilie Houliez , Fabrice Lizon , M. Thyssen , Luis Felipe Artigas , François G Schmitt et al.
Journal of Plankton Research, 2012, 34 (2), pp.136-151. ⟨10.1093/plankt/fbr091⟩
Journal articles hal-00761214v1

The combined effect of ultraviolet B radiation and temperature increase on phytoplankton dynamics and cell cycle using pulse shape recording flow cytometry

M. Thyssen , G. Ferreyra , S. Moreau , I. Schloss , M. Denis et al.
JEMBE, 2011, 406, pp.95-107
Journal articles hal-00760595v1

The combined effect of ultraviolet B radiation and temperature increase on phytoplankton dynamics and cell cycle using pulse shape recording flow cytometry

Melilotus Thyssen , Gustavo Ferreyra , Sébastien Moreau , Irene Schloss , Michel Denis et al.
Journal of Experimental Marine Biology and Ecology, 2011, pp.95;107. ⟨10.1016/j.jembe.2011.06.015⟩
Journal articles hal-00744463v1
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Functional Analysis and Classification of Phytoplankton Based on data from an Automated Flow Cytometer

Anthony Malkassian , David Nerini , M. A. van Dijk , Melilotus Thyssen , Claude Manté et al.
Cytometry Part A, 2011, 79A, pp.263-275. ⟨10.1002/cyto.a.21035⟩
Journal articles hal-00579516v1

Spectral fluorometric characterization of Haptophyte dynamics using the FluoroProbe: an application in the eastern English Channel for monitoring Phaeocystis globosa

Emilie Houliez , Fabrice Lizon , Melilotus Thyssen , Luis Felipe Artigas , François Schimtt et al.
Journal of Plankton Research, 2011, pp.136;151. ⟨10.1093/plankt/fbr091⟩
Journal articles hal-00740228v1
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Ultraphytoplankton basin-scale distribution in the eastern Mediterranean Sea in winter : link to hydrodynamism and nutrients

Michel Denis , Melilotus Thyssen , V. Martin , B. Manca , F. Vidussi et al.
Biogeosciences, 2010, 7 (7), pp.2227-2244. ⟨10.5194/bg-7-2227-2010⟩
Journal articles hal-00514544v1

Phytoplankton distribution during two contrasted summers in a Mediterranean harbour: combining automated submersible flow cytometry with conventional techniques

Melilotus Thyssen , Nicole Garcia , Michel Denis , Beatriz Beker , Dilek Ediger et al.
Environmental Monitoring and Assessment, 2010, pp.1-16
Journal articles hal-01663229v1
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Sub meso scale phytoplankton distribution in the North East Atlantic surface waters determined with an automated flow cytometer

Melilotus Thyssen , N. Garcia , M. Denis
Biogeosciences, 2009, 6 (4), pp.569-583. ⟨10.5194/bg-6-569-2009⟩
Journal articles hal-03112604v1

Short-term vaiation of phytoplankton assemblages in Mediterranean coastal waters recorded with an automated submerged flow cytometer

Melilotus Thyssen , Delphine Mathieu , Nicole Garcia , Michel Denis
Journal of Plankton Research, 2009, 30 (9), pp.1027-1040. ⟨10.1093/plankt/fbn054⟩
Journal articles hal-00363507v1

Microbial community structure along 18°W (39°N–44.5°N) in the NE Atlantic in late summer 2001 (POMME programme)

Camila Fernandez , Melilotus Thyssen , Michel Denis
Journal of Marine Systems, 2008, 71 (1-2), pp.46 - 62. ⟨10.1016/j.jmarsys.2007.06.003⟩
Journal articles hal-01886950v1

Heterotrophic nanoflagellate and ciliate bacterivorous activity and growth in the northeast Atlantic Ocean : a seasonal mesoscale study

Hera Karayanni , Urania Christaki , France van Wambeke , Melilotus Thyssen , Michel Denis et al.
Aquatic Microbial Ecology, 2008, 51, pp.169-181. ⟨10.3354/ame01181⟩
Journal articles hal-00290748v1

Short-term variation of phytoplankton assemblages in Mediterranean coastal waters recorded with an automated submerged flow cytometer

M. Thyssen , D. Mathieu , N. Garcia , M. Denis
Journal of Plankton Research, 2008, 30 (9), pp.1027-1040
Journal articles hal-01663332v1

The emergence of automated high-frequency flow cytometry: revealing temporal and spatial phytoplankton variability

Melilotus Thyssen , Glen A. Tarran , Mikhail V. Zubkov , Ross J. Holland , Gérald Grégori et al.
Journal of Plankton Research, 2008, 30, pp.333-343. ⟨10.1093/plankt/fbn005⟩
Journal articles hal-00691254v1
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Sub meso scale phytoplankton distribution in the north east Atlantic surface waters determined with an automated flow cytometer

M. Thyssen , N. Garcia , M. Denis
Biogeosciences Discussions, 2008, 5 (3), pp.2471-2503
Journal articles hal-00330303v1

Towards a Latin American and Caribbean international census of marine microbes (LACar ICoMM): overview of some current research directions

Luis Felipe Artigas , E. Otero , R. Paranhos , M.L. Gómez , C. Piccini et al.
International Journal of Tropical Biology, 2008, 56 (1), pp.183-214
Journal articles hal-00480991v1

The emergence of automated high-frequency flow cytometry: revealing temporal and spatial phytoplankton variability

Melilotus Thyssen , G. Tarran , M. Zubkov , R. Holland , G. Gregori et al.
Journal of Plankton Research, 2007, 30 (3), pp.333-343. ⟨10.1093/plankt/fbn005⟩
Journal articles hal-03112617v1

Relationship among Several Key Cell Cycle Events in the Developmental Cyanobacterium Anabaena sp. Strain PCC 7120

Samer Sakr , Melilotus Thyssen , Michel Denis , Cheng-Cai Zhang
Journal of Bacteriology, 2006, 188/16, pp.5958-5965
Journal articles hal-00092841v1

The bactericidal effect of TiO2 photocatalysis involves adsorption onto catalyst and the loss of membrane integrity

Gaetan Gogniat , Melilotus Thyssen , Michel Denis , Cesar Pulgarin , Sam Dukan et al.
FEMS Microbiology Letters, 2006, 258, pp.18-24
Journal articles hal-00092800v1
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Spatial distribution of heterotrophic bacteria in the northeast Atlantic (POMME study area) during spring 2001

Melilotus Thyssen , Dominique Lefèvre , Guy Caniaux , Josephine Ras , Camila I. Fernandez et al.
Journal of Geophysical Research, 2005, 110, pp.C07S16-16. ⟨10.1029/2004JC002670⟩
Journal articles hal-00092675v1
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Microbial community production, respiration and structure of the microbial food web of an ecosystem in the northeastern Atlantic Ocean

Anne Maixandeau , Dominique Lefèvre , Hera Karayanni , Urania Christaki , France van Wambeke et al.
Journal of Geophysical Research. Oceans, 2005, 110 (C7), pp.C07S17. ⟨10.1029/2004JC002694⟩
Journal articles hal-00092669v1