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André-Jean Francez
Equipe Réseaux d’Interactions et Transferts de Matières dans les Ecosystèmes

Campus Beaulieu, bât 14b, p.225
CS 74205
Tél: +33 (0)
Mail: @

Keywords: bog, fen, Sphagnum, Eriophorum, Carex, Calluna, microbial communities and activities, ecological succession, ecological stoichiometry, primary production, decomposition, C-sink/source functioning, CO2, methane, volatil organic compounds, nitrogen and sulphur cycles


Areas of expertise

Ecosystem functioningOrganic matterRotifersIsotopic labeling
Peatland dynamicsC-N-S couplingDragonfliesGas analyses
Trophic networksMicrobial and viral loopsClimatic chambers
Peatland restaurationDenitrification

Research topics

My work consists of understanding the structure and the functioning of Sphagnum-dominated peatlands, and more specifically deals with the analysis of biotic interactions controlling and regulating the ecosystem dynamics under global change. My research is carried out, according to four main axes:

  1. the analysis of the role of microbial diversity in the ecological processes of organic matter decay in peatlands (peat accumulation and decomposition, trophic loops, etc.);
  2. the quantification of C-N-S fluxes and the identification of related biotic interactions (including the role of viruses), beneficial to the maintenance of peatland sink functioning;
  3. the characterization of the functional reactivity of pristine and disturbed Sphagnum-dominated peatlands to global change (increasing of temperature and atmospheric nitrogen deposition, land use change);
  4. the analysis of the hydro-ecological regeneration processes following ecosystem restoration.

Main research projects

Hydro-ecological monitoring of Landemarais peatland (Espace Naturel Sensible, Ille-et-Vilaine), site of the National Observation Service ‘SNO-Tourbières’ (CNRS-INSU ) and ZA Armorique-LTER France (CNRS-INEE) - -
Logo Ur1
2015 - UR1 - Défis émergents: Virus biodiversity and carbon emission regulation in Sphagnum-dominated peatlands: what responses to climate change?
2014 - VIRPEAT: Viral and bacterial communities and interactions in Siberian Sphagnum-dominated peatlands - Mukhrino area -
AJF52011 - 2013 - VIRTOU: Microbial and viral diversity of Sphagnum-dominated peatlands
AJF62008 - 2012 - PEATWARM – ANR-07-VULN-0010: Impact of global warming on the carbon-sink function of Sphagnum-dominated peatland ecosystem -

AJF52007 - 2008 - Biotic interactions and C-N-S coupling in regenerating peatland following peat extraction

AJF72004 - 2006 - RECIPE – 6ème PCRDT: Reconciling commercial exploitation of peat with biodiversity in peatland ecosystems -

Main current collaborations


  • University of Helsinki (Pr. Harri Vasander/ Peatland ecology)
  • University Laval – Québec (Pr. Line Rochefort/ Peatland restoration)
  • University of Yugra –Siberia (Pr. Elena Lapshina/ Peatland Vegetation)
  • Ecole Polytechnique Fédérale Lausanne (Pr. Alexandre Buttler, Ecology)


  • University of Orléans (Dr Fatima Laggoun/ Organic Geochemistry)
  • University of Franche-Comté (Pr. Daniel Gilbert/ Microbial ecology)
  • University of Poitiers (Dr Laurent Grasset/ Peat chemistry)
  • University of Toulouse (Dr Vincent Jassey/ Microbial Sphagnum Networks)
  • University of Clermont-Auvergne (Dr Télesphore Sime-Ngando, Viral ecology)
  • University Paris Sorbonne P. et M. Curie (Dr Arnaud Huguet, Peat chemistry)

Education and training (main themes)

Bachelor and master programs

  • Basics of Ecology and Global Change
  • Soil Ecology
  • Microbial Ecology
  • Biogeochemical Cycles
  • Ecology of Wetlands
  • Hydro-ecological Functioning of Sphagnum-dominated peatlands
  • Environmental Impact Assessment
  • Concept of Ecological Indicator
  • Peatland Restoration

Manager of 4 teaching units (L & M)

Supervision of master students and thesis

Publications (5 last years):