Pr. Yvan Lagadeuc

Professor, University of Rennes 1

French, Age: 52

3 daughters

  1. Research
  2. About me
  3. Publications


Research Topics

Functional ecology, plankton ecology, physical-biological processes coupling, freshwater and marine ecosystems.

I’m doing my research in the field of functional ecology. More specifically I’m focusing on the effect of interactions between physical (hydrodynamic) and biological processes on ecosystem functioning and biodiversity.

In this context, the work I have developed was to focus on individual level in the understanding of ecosystem functioning. So I looked at the role of variability / heterogeneity at different scales of time and space, induced by physical processes, on ecosystem. Investigations have been conducted within a theoretical approach, and focused on matter fluxes and population dynamics at first, and competition between species / community structure and biodiversity recently. The biological model was always the plankton, animal or not, and the variability / heterogeneity was induced by hydrodynamical processes: tidal currents, turbulence induced by tide or wind. The approaches have combined field measurements, experiments, numerical analysis and modeling in collaboration with physicists, mathematicians and computer scientists. The researches were undertaken in freshwater and marine systems.

About me

Education and Academic Achievement

Habilitation à diriger les recherches, Université de Lille 1
Ph. D. Thesis, Marine Ecology, University of Lille 1, Earned with honours, Pr S. Frontier supervisor
Master in Applied Biology, University of Lille1, earned with honours, 1/23


- Present
Professor, University of Rennes1, Exceptional class (Highest position for the French university) in 2011, first Class in 2005
Professor, University of Caen
Assistant professor, University of Lille 1
Research Fellow, Laval University, GIROQ center (Pr. J. DODSON and L. LEGENDRE teams), Canada

Teaching and teaching responsibilities

Main topics of teaching

functional ecology, aquatic ecology
statistics for environmental sciences and ecology, and data analysis (multivariate analysis)
physical and ecological processes

Teaching responsibilities

Head of Master in Oceanography, University of Lille 1
Head of master in Ecology, University of Rennes 1
Head of courses in ecology, statistics, oceanography, physical processes in environment

Supervision experience

Ph. D. Supervisions

- présent
Alix Mas, co-supervisor with P. Vandenkoornhuyse
S. Fraisse, co-supervisor with M. Bormans, Research Engineer, INRA
A. Pannard, (co-supervisor with M. Bormans) Assistant professor, University of Rennes 1
F. Jouenne, (co-supervisor with B. Veron and S. Lefebvre) Research Engineer, University of Caen
T. Ruellet, (co-supervisor with J. Kopp and JC Dauvin) Research Engineer, IFREMER (French Institute for Marine Research)
L. Seuront (co-supervisor with D. Schertzer), Professor, Flinders University (Adelaide, Australia) and CNRS research scientist (France)
F. Lizon, Assistant professor, University of Lille 1
Since 1992
Supervision or co-supervision of 17 Masters

Research Management and Collective responsibilities

Vice president for Research, European University of Brittany
Director of Doctoral School “Health, Agronomy and Life”, University of Rennes 1 and 2, Agrocampus Ouest (650 researchers, and 350 PhD students)
Deputy scientific director, CNRS, Institute Ecology and Environment, in charge of research infrastructures
Chair of the French LTER Network “Zone Atelier” (11 sites, 600 collaborators)
Head of Armorican Center for environmental research (500 collaborators) and leader of the OSU (Observatoire des Sciences de l’Univers) project

Ph. D. Supervisions

Elected member at the Administrative council of University of Rennes1
Nominated member in the Scientific council of Doctoral School VAS (Rennes)
Nominated member in the Scientific council of Doctoral School “Sciences de la Mer” (University of Brest)
Nominated member in the Regional Scientific council of Environment, Britany
Member of the PNEC Scientific council (CNRS Scientific Program)
Member of the EC2CO Scientific council (CNRS Scientific Program)
Member and President (-) of the selection committee at the university of Rennes 1 for Population Biology and ecology positions (between 5 and 12 positions per year)
Nominated Member, collège A (Professor), in the National University committee (CNU). This committee validates all the candidates who want to apply in a French University.
, and
President of the steering committee: Laboratoire océnologique de Villefranche (Dir L. Legendre) and CEFREM at Perpignan (Dir. S. Heussner), and doctoral schools in ecology of Paris Saclay University
Member of Alter Net administrative council, elected Vice Chair in December 2011
- present
Member of the scientific council of the "Espace des Sciences"
Member of the Continental surface and interface council, INSU- CNRS
- present
Member and President of the scientific OPE (Observatoire Pérenne de l’Environnement) advisory committee, ANDRA
- present
Coordinator for the ANR (National Research Agency) of the "Make our Planet Great Again" call for projects
- present
Member of the Scientific Steering Committee and the Infrastructure Working Group of the ALLENVI Alliance, representing ANDRA
HCERES Project Manager
- present
Appointed member of the Scientific Council, ANDRA
- present
Coordinator eLTER France, CNRS and French representative within the IR ESFRI eLTER



Frontier S., Davoult D., Gentilhomme V. & Lagadeuc Y., 2001. Statistiques pour les sciences de la vie et de l’environnement. Dunod éditeur, 377 pages.

Articles in a revue

H index=27, around 1900 citations (Google Scholar)

YL 1.
Lagadeuc Y. & Bylinski J.M., 1987. Transport larvaire et recrutement de Polydora ciliata, Annélide polychète, sur le littoral boulonnais. Cah.Biol.Mar., 28, 537-550
YL 2.
Brylinski J.M. & Lagadeuc Y., 1988. Influence du coefficient de la marée sur la répartition côte-large d'une espèce planctonique à affinités côtières : Temora longicornis (Crustacé, copépode). C.R.Acad.Sci.Ser.III., 307, 183-187
YL 3.
Brylinski J.M. & Lagadeuc Y., 1990. L'interface eaux côtières/eaux du large dans le Pas-de-Calais : Une zone frontale, C.R.Acad.Sci, Série II, 311, 535-540
YL 4.
Lagadeuc Y., 1991. La vase à Polydora ciliata (Johnston, 1828), annélide polychète : origine et influence sur la fixation des larves. Cah.Biol.Mar, 32, 439-450
YL 5.
Brylinski J.M., Lagadeuc Y., Gentilhomme V., Dupont J.P., Lafite R., Dupeuple R., Huart M.F. Auger Y., Puskaric E., Wartel M.& Cabioch L., 1991. Le "Fleuve côtier" : un phénomène important en Manche orientale (Exemple du Pas-de-Calais). Oceanol. Acta, 11, 197-203
YL 6.
Lagadeuc Y., 1992. Répartition verticale des larves de Pectinaria koreni en baie de Seine orientale : influence sur le transport et le recrutement. Oceanol.Acta, 15(1), 109-118
YL 7.
Lagadeuc Y. & Colbeaux J.P, 1992. Influence de la composition minéralogique d'une roche sur sa colonisation par Polydora ciliata (Johnston, 1828) (Annélide polychète). Cah.Biol.Mar., 33, 137-146
YL 8.
Thiébaut E., Dauvin J.C. & Lagadeuc Y., 1992. Transport of Owenia fusiformis larvae in the Bay of Seine. I Verticale distribution in relation to water column structure and ontogenic migration. Mar.Ecol.Prog.Ser, 80, 29-39
YL 9.
Lagadeuc Y., 1992. Transport larvaire en Manche, exemple de Pectinaria koreni en Baie de Seine. Oceanol.Acta, 15(4), 383-395
YL 10.
Demers A., Lagadeuc Y., Dodson J.J. & Lemieux R., 1993. Immunofluorescence identification of early life history stages of Scallops (Pectinidae). Mar. Ecol Prog. Ser, 97, 83-89
YL 11.
Thiébaut E., Dauvin J.C. & Lagadeuc Y., 1994. Transport of Owenia fusiformis larvae (Annelida : Polychaeta) in the Bay of Seine. Horizontal distribution and retention. J. Mar. Biol. Ass. UK, 74, 129-142
YL 12.
Raby D., Lagadeuc Y., Dodson J. J. & Mingelbier M., 1994. Relationship between feeding and vertical distribution of bivalve larvae in stratified and mixed waters. Mar. Ecol. Prog. Ser., 103, 275-284
YL 13.
Lizon F., Lagadeuc Y., Brunet C., Aelbrecht D. & Bentley D., 1995. Primary production and photoadaptation of phytoplankton in relation with tidal mixing in coastal waters. J. Plankton Res., 17(5), 1039-1055
YL 14.
Lambert R., Retière Ch. & Lagadeuc Y., 1996. Metamorphosis and settlement of Pectinaria koreni (Annelida : Polychaeta). Consequences on the recruitment of an isolated population in the eastern Bay of Seine (France). J. Mar. Biol.Ass., 76(1), 23-36
YL 15.
Seuront L., F. Schmitt, Lagadeuc Y., Schertzer D., Lovejoy S. & Frontier S., 1996. Multiscale inhomogeneous structuration of phytoplankton biomass in a turbulent environment. Geophysical Res. letters, 23(24), 3591-3594
YL 16.
Seuront L., Schmitt F., Schertzer D., Lagadeuc Y. & Lovejoy S., 1996. Multifractal analysis of eulerian and lagrangian variability of oceanic physical and biological turbulent fields. Nonlinear Processes in Geophysics. 3 (4), 236-246
YL 17.
Lagadeuc Y., Brylinski J.M. & D. Aelbrecht. 1997 Temporal variability of the vertical stratification of a front in a tidal ROFI system. J. Mar. Sys., 12, 147-155
YL 18.
Lagadeuc Y., Boulé M. & Dodson J. J., 1997. Effect of vertical mixing on the vertical distribution of copepods in a coastal water. J. Plankt. Res., 19 (9), 1183-1204
YL 19.
Raby D., Mingelbier M., Dodson J.J., Klein B., Lagadeuc Y. & Legendre L., 1997. Food-particle size and selection by bivalve larvae in a temperate embayment. Mar. Biol., 127, 665-672
YL 20.
Seuront L. & Lagadeuc Y., 1997. Characterization of space-time variability in stratified and mixed coastal waters : application of fractal theory. Mar.Ecol. Prog. Ser., 149, 81-95
YL 21.
Lizon F. & Lagadeuc Y., 1998. Comparisons of primary production values estimated from different incubation times in a coastal sea. J. Plankt. Res., 20 (2), 371-382
YL 22.
Lizon F., Seuront L. & Lagadeuc Y., 1998. Photoadaptation and primary production study in tidally mixed coastal waters using a lagrangian model. Mar.Ecol. Prog. Ser., 169, 43-54
YL 23.
Seuront L. & Lagadeuc Y., 1998. Spatio-temporal structuration of tidally mixed coastal waters : variability and heterogeneity. J. Plankt. Res., 20 (7), 1387-1401
YL 24.
Thiébaut E., Lagadeuc Y., Olivier F., Dauvin J.C. & Retière C., 1998. How hydrodynamic factors affect the recruitment of marine invertebrates in a macrotidal area ? The case study of Pectinaria koreni (Polychaeta) in the Bay of Seine (English Channel), Hydrobiologia 375/376, 165-17
YL 25.
Seuront, L., Schmitt, F., Lagadeuc Y., Schertzer, D. & Lovejoy, S., 1999. Universal multifractal analysis as a tool to characterize multiscale intermittent patterns. Exemple of phytoplankton distribution in turbulent coastal waters. J. Plankt. Res., 21 (1), 877-922
YL 26.
Seuront L., Schmitt F. & Lagadeuc Y., 2001 Turbulence intermittency, small-scale phytoplankton patchiness and encounter rates in plankton : where do we go from here ? Deep-Sea Res. I, 48, 1199-1215
YL 27.
Seuront L & Lagadeuc Y. 2001. Multiscale distribution of the calanoid copepod Temora longicornis in a turbulent coastal sea. J. Plankt. Res., 23, 1137-1145
YL 28.
Seuront L. & Lagadeuc Y., 2001. Variability, inhomogenity and heterogeneity : dealing with scale in ecology. J. Biol. Systems, 9 (2), 81-87
YL 29.
Engel C., Valero M., Lagadeuc Y. & C. Destombe 2002. Non-random mating in controlled multiple-donor crosses in Gracilaria gracilis. European Journal of Phycology, 37, 179-190
YL 30.
Seuront L., Gentilhomme V. & Lagadeuc Y. 2002 Do small-scale nutrient patches exist in tidally mixed coastal waters? Mar.Ecol. Prog. Ser., 239, 29-44
YL 31.
Jouenne F., Lefebvre S., Véron B. & Y. Lagadeuc, 2005. Biological and physicochemical factors controlling short-term variability in phytoplankton primary production and photosynthetic parameters in a macrotidal ecosystem (eastern English Channel). Estuarine, Coastal and Shelf Science, 65, 421-439
YL 32.
Calaud V., Y. Lagadeuc 2005. Structural stability of a age structured model of fish: the case of the anchovy in the bay of Biscay, Acta Biotheorethica 53: 341–358
YL 33.
Lagadeuc Y., 2005 : Nutrient fluxes toward phytoplankton: is it useful to consider turbulence intermittency? Acta Biotheorethica 53: 371–379
YL 34.
Pannard A., Bormans M. and Y. Lagadeuc, 2007. Phytoplankton community responses from daily to seasonal physical and chemical forcing in reservoirs, Freshwater Biology, 52, 12-27
YL 35.
Jouenne F., Lefebvre S., Véron B. & Y. Lagadeuc. 2007. Annual variability of phytoplankton community structure and primary production in the Baie des Veys (eastern English Channel, France). Mar Biol, 151, 805-825
YL 36.
Pannard A., Bormans M., Lefebvre S., Claquin P. & Y Lagadeuc, 2007. Phytoplankton size distribution and community structure: influence of nutrient input and sedimentary loss. Journal of Plankton Research, 29, 583-598
YL 37.
Pannard A., Bormans M. and Y. Lagadeuc, 2008, Phytoplankton species turnover controlled by physical forcing at different time scales, Can J. Fish Aquat Sci., 65, 47-60
YL 38.
F Castella, JP Hoffbeck & Y. Lagadeuc, 2009 A reduced model for spatially structured predator-preysystems with fast spatial migrations and slow demographic evolutions, ASYMPTOTIC ANALYSIS, 61, 3-4, 125-175
YL 39.
Y. Lagadeuc & R. Chenorkian, 2009. Les systèmes socio-écologiques : vers une approche spatiale et temporelle, NSS, 17, 2, 194 – 196
YL 40.
Vandenkoornhuyse P., A.Dufresne, A. Quaiser, G. Gouesbet, F. Binet, A-J Francez, S. Mahé, M. Bormans, Y. Lagadeuc & I. Couée, 2010. Integration of molecular functions at the ecosystemic level : breakthroughs and future goals of environmental genomics and post-genomics, Ecology Letters, 13(6), 776-791
YL 41.
Fraisse S., Bormans M. and Y. Lagadeuc, 2012. Phytoplankton community in rivers: a morphofunctional traits approach, Aquatic ecology, 47, 315-327
YL 42.
Fraisse S., Bormans M. and Y. Lagadeuc, 2015. Turbulence effects on phytoplankton morphofunctional traits sélection, L&O, 60(3), 872-884
YL 43.
Mouquet, N, Lagadeuc Y, et al. Predictive ecology in a changing world, J. Applied Ecology, 52(5), 1293-1310
YL 44.
Castella F., Madec S. and Y. Lagadeuc, 2015. Global behavior of N competing species with strong diffusion : diffusion leads to exclusion. Applicable Analysis, Volume: 95 Issue: 2 Pages: 341-372
YL 45.
Pannard A., J. Pédrono, E.Briand, P. Claquin*, E. Briand, M. Bormans and Y. Lagadeuc, 2016. Production of exopolymers (EPS) by the cyanobacterium : impact on the carbon-to-nutrient ratio of the particulate organic matter. Aquatic Ecology, 50:29–44
YL 46.
Rolland D. , Haury J., Marmonier P. et Y. Lagadeuc, 2015. Effect of macrophytes on flow conditions and deposition of suspended particles in small streams: an experimental study using artificial végétation. Journal of Water Science, Volume 28, numéro 3, p. 231-245
YL 47.
Alix M., Shahrad J., Lagadeuc Y., Eveillard D., Vandenkoornhuyse P., 2016. Beyond the Black Queen Hypothesis, ISME, mars 8
YL 48.
Gaillardet J. et al , 2018. OZCAR : the French network of Critical Zone Observatories, Vadose Zone Journal, vol17 (1)

35 talks in international Conferences and 11 invited talks.