LE MAIRE Guerric

Le Maire GuerricChercheur

Cirad Montpellier

 Animateur du thème 3 


INRAe, UMR Eco&Sols
Campus La gaillarde Institut AGro - INRAe - Bat 12 - 1er étage
2 place Viala - 34060 Montpellier


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Site Cirad G Le Maire

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  • Permanent researcher at Cirad in the Eco&Sols unit (since 2008)

    Cirad is the French agricultural research and international cooperation organization working for the sustainable development of tropical and Mediterranean regions

  • Visiting scientist at UNICAMP, Campinas (SP), Brazil (2015-2018)



My research focus on the understanding of the functioning of tropical forests plantations and agroforestry ecosystems, with the objective of providing scientific bases to improve the sustainability and to reduce the environmental impact of these ecosystems, in the context of global changes. For this purpose, I develop approaches based on modelling of biogeochemical cycles and on the analysis of remote-sensing data.


Carbon, water and nutrient cycles in tropical forest and agroforestry ecosystems
  • Development of ecophysiological process-based models at tree scale (Maestra/Maespa model), stand scale (Castanea, G'Day) and regional scale (Orchidée)
  • Main ecosystems studied: Eucalypt plantations, Mixed plantations, Coffee-based agroforestry, semi-arid agro-silvo-pastoral ecosystem
  • Remote sensing data assimilation in process-based ecosystem models
Remote sensing for vegetation biophysical parameter retrieval and vegetation classification
  • Satellite image time series analysis and link with forest properties: disturbances, biophysical parameters, temperature, and assimilation within process-based model
  • Modelling of radiative transfer in leaves and canopies
  • Hyperspectral remote sensing at the leaf and canopy scale
  • Satellite Lidar for the estimation of forest biomass
  • Land use and land use change: object-based classification and analysis of vegetation indices time-series for crop identification, machine learning



  • HDR, "Remote sensing and modeling of carbon and water functioning in managed forest ecosystems", doctorate school GAIA (Université Montpellier 2, 2018)
  • PhD in Plant Ecophysiology (Université Paris Sud XI, 2005)
  • M.S. in Ecology (Université Paris VI and XI, ENS, INA P-G, 2002)
  • Engineer degree in Agronomy (Institut National Agronomique Paris-Grignon INA P-G, 2002)

Experience in research and cooperation

2002-2005 PhD Thesis, Laboratoire Ecologie, Systématique et Evolution, CNRS & Université Paris XI, Orsay: Estimation of a large forest carbon budget in France (Fontainebleau forest). Use of remote-sensing for parameterizing the model; Supervisors : Dr. C. François, Dr. E. Dufrêne

2006-2008 Post-doc, Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CEA, Saclay; Improvement of ORCHIDEE global vegetation model for forest management simulations ; Supervisor : Dr. P. Ciais, Dr. N. Viovy

2008-2010 CIRAD Researcher, UPR80, Fonctionnement et pilotage des écosystèmes de plantations, located at TETIS research unit

2015-2018 Visiting researcher at NIPE, UNICAMP (Campinas, Brazil) and at CTBE, CNPEM (Campinas, Brazil)

2010-ongoing CIRAD Researcher, Eco&Sols joint research unit (CIRAD-INRA-IRD-SupAgro), co-animator of "Thème de Recherche 3: Bilan C, fertilité des sols et changements globaux" (since 2019)


Student supervision

PhD of Renaud Decarsin: "The effects of species and functional diversity on drought resilience in forest plantations", Institut Agro, Montpellier, co-supervision with Dr J. Guillemot and Dr N. Martin St Paul (2021-2024)

PhD of Ivan Cornut: "Studying the impact of potassium availability on the productivity of tropical eucalypt plantations using mechanistic modelling", Paris Saclay University, co-supervision with Dr N. Delpierre (2018-2022)

PhD of Ana Luciano: "Identification of sugarcane areas and estimation of agricultural productivity of the crop", UNICAMP,Campinas, Brésil, co-supervision with P. J.V. Rocha (2016-2019)

PhD Thesis of Remi Vezy: "Simulation of alternative management practices for perennial plantation adaptation to global changes", Bordeaux University, co-supervision with Dr. Denis Loustau (2014-2017)

PhD Thesis of Clifton Sabajo: "Land use and land cover changes in South East Asia and their effects on carbon and energy fluxes to the atmosphere", Erasmus Mundus, Göttingen University - AgroParisTech; co-supervisor with Pr. A. Knohl (2013-2018)

PhD Thesis of Julianne C Oliveira: "Use of a three-dimensional radiative transfer model to simulate Eucalyptus plantation reflectance, LiDAR signal and absorbed radiation at the tree scale", University of São Paulo (ESALQ), Co-Supervisor with Pr. L. Estraviz (2012-2016)

PhD Thesis of Mathias Christina: "Modeling the coupled water-carbon budget at tree-scale in Eucalyptus plantations under water and nutrient constraints", Co-Supervisor with Dr. J-P Laclau (2011-2014)

PhD Thesis of Claire Marsden: "Carbon and water budget of fast-growing Eucalyptus plantations: Modelling and extrapolation from stand to regional-scale", Co-Supervisor with Pr. D. Epron and Y. Nouvellon (2008-2010)

PhD Thesis of Valentin Bellassen: "Forest management and carbon cycle : contribution of large-scale modelling and remote sensing", Co-Supervisor with Dr. N. Viovy (2008-2010)



Guerric Le Maire publications


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