ECOLAB > Pages profils > BOULÊTREAU Stéphanie

Profil de Stéphanie BOULÊTREAU


Email :

Téléphone / phone: 05 61 55 73 48

Bureau / office : 336

Institution : UPS

Statut / status: ITA

Adresse professionnelle / address:

Laboratoire Ecologie fonctionnelle & Environnement EcoLab
UMR 5245 - University Paul Sabatier/CNRS/INPT
118 route de Narbonne
31062 Toulouse cedex 9, France

Site perso / personal website :

Professional experience

- from September 2014 : Research engineer, University of Toulouse

- 2009-2014: Research engineer, CNRS

- 2007-2008: Postdoctoral researcher, CNRS

- 2006-2007: Teaching assistant, University of Toulouse


- 2004-2007: PhD in Ecology & Evolution, University of Toulouse

Determinism of the accretion and detachment functions of phototrophic biofilm in natural systems: experimental and numerical studies of the factors that control biomass in rivers. Supervisors: Dr Sabine Sauvage and Dr José-Miguel Sanchez-Pérez

- 2003-2004: Master of Science in Ecology in Continental Ecosystems, University of Toulouse

- 2000-2003: Engineering Master’s degree in Water and Environmental Sciences, ENGEES, Strasbourg

The extent of the impact of human activities on Earth requires to consider humankind as an environmental major force. My research interests deal with the effects of human-induced changes on the relationships between the food-web structure and the functioning of ecosystem in freshwaters. I aim at understanding how water warming drives microbial diversity and structuring and how microbial diversity and community dynamics affects microbial processes. How warming affects species trophic interactions, how species structure influences trophic interactions and ecosystem functioning and, how non-native species modify trophic interactions ?

I am working on diverse biota, from bacterial communities to fish from field survey, laboratory experiments and deterministic modeling.

Key-words: warming effect, biological invasions, stable isotope analysis, trophic interactions, microbial community structure,  denitrification activity, metabolism, phototrophic river biofilms

Main students’ supervision

Camille Courcoul, PhD, 2019-2022

Stability of microbial communities exposed to multiple stressors in a context of global change: tipping points and stabilisation factors. Co-supervision with Joséphine Leflaive (EcoLab)

- Marlène Chiarello, Post-doc, 2017-2018

Biogeography of bacterial communities and host-microbiota interactions in the skin mucus of the European catfish Silurus glanis

- Camille Musseau, PhD, 2013-2015. Co-supervision with Frédéric Santoul (EcoLab)

Interactions trophiques au sein de populations endémiques de truite marbrée (Salmo marmoratus)

- Elodie Rilova, Master 2 Chimie-Santé Université Toulouse, 2018. Co-supervision with Frédéric Julien (EcoLab) 

Caractérisation biochimique du mucus de peau du silure glane : développement d'une méthode d'extraction et d'analyse des polysaccharides.

- Benjamin Laffitte, Master 2 Ecologie et Anthropisation Université Toulouse, 2016. Co-supervision with Jospéhine Leflaive (EcoLab)

Résistance et résilience des communautés microbiennes face à un stress d'assèchement - le rôle de la diversité verticale et l'effet du contexte trophique.

- Rémy Lassus, Master 2 Ecologie et Biosciences de l'Environnement Université Toulouse, 2013.Co-supervision with Antoine Lecerf (EcoLab)

Réponse trophique de Gammaridae à la diminution des prélèvementsd'eau et des pics de température.

- Alban Sagouis, Master 2 Modélisation des Systèmes Ecologiques Université Toulouse, 2013. Co-supervision with Julien Cucherousset (EDB)

Effets des introductions d’espèces non-natives de poisson sur la structure des réseaux trophiques d’eau douce à l’échelle mondiale.

Reviewing activity

Aquatic Microbial Ecology, Ecological Modelling, Ecological Indicators, Journal of Hydrology, PLoS ONE, Ecosphere, Scientific Reports, STOTEN, Water, Biological Invasions 

Main/Recent publications


-Musseau C, Vincenzi S, Santoul F, Boulêtreau S, Jesenšek D, Crivelli AJ. 2019. Within-individual trophic variability drives short-term infraspecific trait variation in natural populations. Journal of Animal Ecology (in press).

-Chiarello M, Pas-Vinas I, Veyssière C, Santoul F, Loot G, Ferriol J, Boulêtreau S. 2019. Environmental conditions and neutral processes shape the skin microbiome of European catfish (Silurus glanis) populations of Southwestern France. Environmental Microbiology Reports 11(4): 605-614.


-Guillerault N, Boulêtreau S, Santoul F. 2018. Predation of European catfish on anadromous fish species in an anthropized area. Marine and Freshwater Research 70(5): 682-686.

-Sauvage S, Sanchez-Pérez JM, Vervier P, Naiman RJ, Alexandre H, Bernard-Jannin L, Boulêtreau S, Delmotte S, Julien F, Peyrard D, Sun XL, Gerino M. 2018. Modelling the role of riverbed compartments in the regulation of water quality as an ecological service. Ecological Engineering 118: 19-30

-Boulêtreau S, Gaillagot A, Carry L, Tetard S, De Oliveira E, Santoul F. 2018. Adult Atlantic salmon have a new freshwater predator. PLoS ONE 13(4): e0196046.

-Daryono RN, Feurtet-Mazel A, Boulêtreau S, Garabetian F. 2018. Using an electrochemical assay to determine the biofilm elasticity as a response to toxicant exposure. IOP Conf Ser: Earth Environ Sci 156: 012005.


-Cucherousset J, Horky P, Slavík O, Ovidio M, Arlinghaus R, Boulêtreau S, Britton R, García-Berthou E, Santoul F. 2017. Ecology, behaviour,and management of the European catfish. Review in Fish Biology and Fisheries 28:177-190.

-Musseau C, Vincenzi S, Jesenšek D, Boulêtreau S, Santoul F, Nicolas D, Crivelli AJ. 2017. Dietary niche expansion and niche shift in native marble trout (Salmo marmoratus) living in sympatry with introduced rainbow trout (Oncorhynchus mykiss). Ecology of Freshwater Fish 27: 720-731.

-Guillerault N, Boulêtreau S, Iribar A, Valentini A, Santoul F. 2017. Application of DNA metabarcoding on faeces to identify European catfish Silurus glanis diet. Journal of Fish Biology 90: 2214-2219.

-Boulêtreau S, Santoul F. 2017. The end of the mythical giant catfish. Bulletin of the Ecological Society of America 98(2): 150-152.


-Comte L, Cucherousset J, Boulêtreau S, Olden JD. 2016. Resource partitioning and functional diversity of worldwide freshwater fish communities. Ecosphere 7(6) : e01356. 10.1002/ecs2.1356.

-Boulêtreau S, Verdeyroux P, Lorthiois E, Azémar F, Compin A, Santoul F (2016) Do you eat or not? Predation behaviour of European catfish (Silurus glanis) toward live bait on a hook. The Open Fish Science Journal 9: 19-25.

-Pool TK, Cucherousset J, Boulêtreau S, Villéger S, Strecker AL, Grenouillet G (2016) Increased taxonomic and functional similarity does not increase the trophic similarity of communities. Global Ecology and Biogeography 25: 46-54.


-Musseau C, Vincenzi S, Jesensek D, Cantera I, Boulêtreau S, Santoul F, Crivelli AJ (2015) Direct and indirect effects of environmental factors on dietary niches in size-structured populations of a wild salmonid. Ecosphere 6(12):256.

-Guillerault N, Delmotte S, Boulêtreau S, Lauezral C, Poulet N, Santoul F (2015) Does the non-native European catfish Silurus glanis threaten French river fish populations? Freshwater Biology 60: 922-928.

-Sagouis A, Cucherousset J, Villéger S, Santoul F, Boulêtreau S (2015) Non-native species modify the isotopic structure of freshwater fish communities across the globe. Ecography 38: 1-7.


-Musseau C, Boulenger C, Crivelli Alain J, Lebel I, Pascal M, Boulêtreau S, Santoul F (2014) Native European eels as a potential biological control for invasive crayfish. Freshwater Biology 60: 636-645.

-Boulêtreau S, Lyautey E, Dubois S, Compin A, Delattre C, Touron-Bodilis A, Mastrorillo S, Garabetian F. 2014. Warming-induced changes in denitrifier community structure modulate the ability of phototrophic river biofilms to denitrify. Science of the Total Environment 466-467: 856-863.


-Chaibi R, Si Bachir A, Chenchouni H, Boulêtreau S, Céréghino R, Santoul F. 2012. Effect of large-scale environmental variables and human pressure on distribution patterns of exotic contrinental fish in east Algeria. Zoology and Ecology 0: 1-6

-Cucherousset J, Boulêtreau S, Azémar F, Compin A, Guillaume M, Santoul F. 2012. “Freshwater Killer Whales”: beaching behavior of an alien fish to hunt land birds. PloS ONE 7(12): e50840.

-Boulêtreau S, Salvo E, Lyautey E, Mastrorillo S and Garabetian F. 2012. Temperature dependence of denitrification in phototrophic river biofilms. Science of the Total Environment 416: 323-328.

-Majdi N, Mialet B, Boyer S, Tackx M, Leflaive J, Boulêtreau S, Ten-Hage L, Julien F, Fernandez R and Buffan-Dubau E. 2012. Relationship between an epilithic biofilm and its associated meiofauna under two patterns of flood disturbance. Freshwater Science (ex Journal of the North American Benthological Society) 31(1): 38-50.

-Cucherousset J, Boulêtreau S, Martino A, Roussel J-M and Santoul F. 2012. Using stable isotope to determine the ecological effects of non-native fishes. Fisheries and Management Ecology 19: 111-119.


-Boulêtreau S, Cucherousset J, Villeger S, Masson R and Santoul F. 2011. Colossal aggregations of giant alien freshwater fish as a potential biogeochemical hotspot. PLoS ONE 6(10): e25732.

-Lyautey E, Cournet A, Morin S, Boulêtreau S, Etcheverry L, Charcosset JY, Delmas F, Bergel A and Garabetian F. 2011. Electroactivity of phototrophic river biofilms and constitutive cultivable bacteria. Applied Environmental Microbiology 77: 5394-5401.;77/15/5394

-Boulêtreau S, Charcosset J-Y, Gamby J, Lyautey E, Mastrorillo S, Azémar F, Moulin F, Tribollet B and Garabetian F. 2011. Rotating disk electrodes to monitor river biofilm thickness and elasticity. Water Research 45: 1347-1357.


-Graba M, Moulin FY, Boulêtreau S, Garabetian F, Kettab A, Eiff O, Sánchez-Pérez J-M and Sauvage S. 2010. Dynamics of epilithic biofilm biomass in artificial rough, open-channel flow: experimental and modelling approaches. Water Resources Research 46: W11531

-Boulêtreau S, Sellali M, Elosegi A, Nicaise Y, Bercovitz Y, Moulin F, Eiff O, Sauvage S, Sánchez-Pérez J-M and Garabetian F. 2010. Temporal dynamics of river biofilm in constant flows: a case study in a riverside laboratory flume. International Review of Hydrobiology 95(2): 156-170.

-Lyautey E, Boulêtreau S, Madigou EY and Garabetian F. 2010. Viability of differentiated epilithic bacterial communities in the River Garonne (SW France). Hydrobiologia 637: 207-218.


-Leflaive J, Boulêtreau S, Buffan-Dubau E and Ten-Hage L. 2008. Temporal patterns in epilithic biofilm – relation with a putative allelopathic activity. Fundamental and Applied Limnology 173(2): 121-134      

-Boulêtreau S, Izagirre O, Garabetian F, Sauvage S, Elosegi A and Sánchez-Pérez J-M. 2008. Identification of a minimum adequate model to describe the biomass dynamics of river epilithon. River Research and Applications 24: 36-53.


-Azémar F, Boulêtreau S, Lionard M, Muylaert K, Vyverman W, Meire P and Tackx M. 2006. Looking for general trends in trophic interaction among estuarine micro- and mesozooplankton. Journal of Plankton Research 29: 135-147.

-Boulêtreau S, Garabetian F, Sauvage S and Sánchez-Pérez J-M. 2006. Assessing the importance of a self-generated detachment process in river biofilm models. Freshwater Biology 51: 901-912.


-Lionard M, Azémar F, Boulêtreau S, Muylaert K, Tackx M and Vyverman W. 2005. Grazing by meso- and microzooplankton on phytoplankton in the upper reaches of the Schelde estuary (Belgium/Netherlands). Estuarine coastal and shelf science 64: 764-774.


-Tackx M, Azémar F, Boulêtreau S, De Pauw N, Bakker K, Sautour B, Gasparini S, Soetaert K, Van Damme S and Meire P. 2005. Zooplankton in the Shelde estuary, Belgium and the Netherlands: long-term trends in spring populations. Hydrobiologia 540: 275-278.

Project leading

-CoSMiC, 2017-2019, Microbiote et composition biochimique du mucus de peau du silure glane (Silurus glanis).

-MIGRA-SIL, 2019-2022, Impact potentiel du silure glane sur les espèces migratrices du bassin Adour-Garonne. Partenariat avec MIGADO, l'Agence de l'Eau Adour-Garonne, FEDER, EDF R&D.

-Surveillance hydrobiologique et ichtyologique de l'écosystème Garonne soumis aux rejets d'eau chaude issus du fonctionnement du complexe nucléaire de production d'électricité de Golfech (82), 2017-2018. Partenariat avec EDF et MIGADO.

-AquaThermie, 2012-2015, Réchauffement climatique et biocénoses aquatiques. Partenariat avec l'ONEMA (AFB) et EDF R&D.

-HotPlate, 2014-2015, Conception d'un support thermorégulé immangeable pour l'étude in situ de l'effet de l'élévation de température sur la colonisation de surface par les microorganismes. Partenariat avec EDF R&D.

-ExoLac, 2009-2011, Conséquences de la présence d'espèces non-natives sur la structure et le fonctionnement de réseaux trophiques de plans d'eau. Partenariat avec l'ONEMA (AFB).

-GolFilm, 2008-2010, Effets de la température sur les communautés microbiennes des biofilms photographes de rivière. Partenariat avec EDF R&D.

Project support

-STOECHIOINVA, 2019-2020, Composition stoechiométrique, invasions biologiques et fonctionnement des écosystèmes aquatiques. Initiative CNRS EC2CO « Ecosphère Continentale et Côtière ». Project leader : Julien Cucherousset (EDB, Toulouse)

-I-MuSCyc, 2018-2019, Impact of Multiple Stressors (Temperature, Eutrophication & Pesticides) on Shifts and Nutrient Cycling in a Benthic-Pelagic Community. Initiative CNRS EC2CO « Ecosphère Continentale et Côtière ». Project leader : Joséphine Leflaive (EcoLab)

-CLIMSHIFT, 2018-2020, Regime shifts in freshwater ecosystems exposed to multiple stressors by increasing temperature, fertilizers and pesticides. French/German ANR. Main coordinator : Elisabeth Gross (LIEC, Metz).

-SIL-GEN, 2016-2018, Structure génétique des populations de silure glane : estimation des stocks dans le bassin de la Garonne. Partenariat avec l'Agence de l'Eau Adour-Garonne et l'UFBAG. Project leader : Frédéric Santoul (EcoLab)

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