Biodiversité, flux et changements globaux

Nathalie FROMIN

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I am a soil ecologist studying plant - microorganisms - soil interactions in terrestrial ecosystems in a context of global change. My research aims at understanding the response of soil microbial communities and the processes they control to plant diversity in a changing world.

See my publications on ResearchGate



7 rue du Four Solaire

66120 Odeillo

tél : 33 (0)4 68 30 77 46


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Brief biography

  • 1995: Forest Engineer (Ecole Nationale du Génie Rural des Eaux et des Forêts, Nancy, France)
  • 1995: Diplôme d'Etudes Approfondies (master) in Microbial Ecology (Université Claude Bernard, Lyon, France)
  • 1998: PhD Université de Provence (Marseille, France)
  • 1999-2004: research associate and master assistant, University of Neuchâtel (Switzerland)
  • 2004-2005: research associate, Centre d'Ecologie Fonctionnelle et Evolutive (Montpellier, France)



Soil microbial ecology, biodiversity, plant-microorganism interactions, above-belowground interactions, carbon and nutrient cycling, global change, functional diversity, soil organic matter

Recent and ongoing projects :

  • StoichioDIVERSITY: A stoichiometric approach to biodiversity and biogeochemical cycles in the Amazonian forest (2009-2011), grant PIR Amazonie II,  coordination S. Hättenschwiler.

  • DeLiFor: Réponse des communautés de décomposeurs aux limitations nutritives en forêt tropicale guyanaise (2012-2013) Grant CNRS-INSU EC2CO MICROBIEN / BIOHEFECT, coordination N. Fromin.

  • CLIMED: Climate change effects on Mediterranean biodiversity and consequences for ecosystem functioning (2010-2013) Grant ANR Changements Environnementaux et Planétaires, coordination : Stephan Hättenschwiler (UMR CEFE).

  • TalVeg2: Une approche innovante pour l'aménagement et le monitoring des écosystèmes (2015-2018) Partners: société Valorhiz, INRA (coord. Alexia Stokes), CNRS (coord. Nathalie Fromin), financing FEDER - Région Occitanie.

  • MULTIVERS: Global change, plant-soil diversity a,d ecosystem multifunctionlity: the role of plant and soil organism biodiversity in soil functions (2016-2017) Grant CNRS-INSU EC2CO, coordination Grégoire Freschet (UMR CEFE).

  • PyreVeg : Quand les plantes jouent à domicile : Interactions biologiques et restauration des fonctions écologiques des sols dans les Pyrénées, en partenariat avec le Conservatoire Botanique National Pyrénées – Midi-Pyrénées. (depuis 2016)

  • SoilForEurope: Predicting European forest soil biodiversity and its functioning under ongoing climate change  (2017-2019). Financing ERANET BiodivERsA, coordination Stephan Hättenschwiler.

  • DIV-TROP: What biological mechanisms link biodiversity to tropical forest functioning? A tree experiment in Brazil (2018-2019) Financing LabEx Centre Médirerranéen Environnement et Biodiversité, coordination Joannes Guillemot (CIRAD - UMR Eco&Sols).


Selected publications

Fanin N., Fromin N., Baranta S., Hättenschwiler S. (2017) Stoichiometric plasticity of microbial communities is similar between litter and soil in a tropical rainforest. Scientific Reports 7: 12498. doi:10.1038/s41598-017-12609-8

Santonja M.& Rancon A., Fromin N., Baldy V., Hättenschwiler S., Fernandez C., Montes N., Mirleau P. (2017) Plant litter diversity increases microbial abundance, fungal diversity, and carbon and nitrogen cycling in a Mediterranean shrubland. Soil Biology and Biochemistry 111: 124-134.

Gallet R., Violle C., Fromin N., Zahab R., Enquist B., Lenormand T. (2017) The evolution of bacterial cell size: the internal diffusion constraint. The ISME Journal 11: 1559-1568. doi:10.1038/ismej.2017.35

Shihan A., Hättenschwiler S., Milcu A., Joly F.-X., Santonja M., Fromin N. (2017) Changes in soil microbial substrate utilization in response to altered litter diversity and precipitation in a Mediterranean shrubland. Biology & Fertility of Soils 53: 171-185. doi:10.1007/s00374-016-1166-9

Joly F-X, Fromin N., Kiikilä O., Scherer-Lorenzen M., Hättenschwiler S. (2016) Diversity of leaf litter leachates from temperate forest trees and its consequences for soil microbial activity. Biogeochemsitry 129: 373-388 DOI: 10.1007/s10533-016-0239-z

Roy J., Picon-Cochard C., Augusti A., Benot M.-L., Thiery L., Darsonville O., Landais D., Piel C., Defossez M., Devidal S., Escape C., Ravel O., Milcu A., Fromin N., Volaire F. Bahn M., and Soussana J.-F. (2016) Elevated CO2 maintains net carbon uptake under a future heat and drought extreme. Proceedings of the National Academy of Sciences of the United States of America 113(22): 6224-6229

Fanin N., Fromin N., Bertrand I. (2016) Functional breadth and home-field advantage generate functional differences among soil microbial decomposers. Ecology 97(4): 1023-1037

Fanin N., Hättenschwiler S., Chavez Soria P., Fromin N (2016) (A)synchronous availabilities of N and P regulate the activity and structure of the microbial decomposer community. Frontiers in Microbiology 6: art. 1507 doi: 10.3389/fmicb.2015.01507

Coulis M., Fromin N., David J.-F., Gavinet J., Clet A., Roy J., Devidal S., Hättenschwiler S. (2015) Functional dissimilarity across trophic levels as a driver of soil processes in a Mediterranean decomposer system exposed to two moisture levels. Oïkos 124: 1304-1316. doi: 10.1111/oik.01917

Joly F-X, Coulis M., Gérard A., Fromin N., Hättenschwiler S. (2015) Litter-type specific microbial responses to the transformation of leaf litter into millipede fecal pellets. Soil Biology & Biochemistry 86: 17-23

Fanin N., Hättenschwiler S., Schimann H., Fromin N. (2015) Interactive effects of C, N, and P fertilization on soil microbial community structure and function in an Amazonian rainforest. Functional Ecology 29: 140-150

Barantal S., Schimann H., Fromin N., Hättenschwiler S. (2014) C, N, and P fertilization in an Amazonian rainforest support stoichiometric dissimilarity as a driver of litter diversity effects on decomposition. Proceedings of the Royal Society B 281: 20141682

Fanin N., Hättenschwiler S., Fromin N. (2014) Litter fingerprint on microbial biomass, activity, and community structure in the underlying soil. Plant & Soil 379:79-91

Coulis M., Hättenschwiler S., Fromin N., David J.-F. (2013) Macroarthropod-microorganism interactions during the decomposition of Mediterranean shrub litter at different moisture levels. Soil Biology & Biochemistry 64: 114-121.

Fanin N., Fromin N., Buatois B., Hättenschwiler S. (2013) An experimental test of the hypothesis of non-homeostatic consumer stoichiometry in a plant litter-microbe system. Ecology Letters 16 : 764-772 doi: 10.1111/ele.12108

Fromin N., Saby N., Lensi R., Brunet D., Porte B., Domenach A.-M., Roggy J.-C. (2013) Spatial variability of soil microbial functioning in a tropical rainforest of French Guiana using nested sampling. Geoderma 197-198: 98-107

Fanin N., Barantal S., Fromin N., Schimann H., Schevin P., Hättenschwiler S. (2012) Distinct microbial limitations in litter and underlying soil revealed by Carbon and nutrient limitations in a tropical rainforest. PLoS ONE 7(12): e49990

Barantal S., Schimann H., Fromin N., Hättenschwiler S. (2012) Nutrient and carbon limitation on decomposition in an Amazonian moist forest. Ecosystems 15: 1039-1052

Fromin N., Porte B., Lensi R., Hamelin J., Domenach A.-M., Buatois B., Roggy J.-C. (2012) Spatial heterogeneity of the functional stability of microbial respiration process: A microcosm study using tropical forest soil. Journal of Soils and Sediments 12:1030-1039

Barantal S., Roy J., Fromin N., Schimann H., Hättenschwiler S. (2011) Long-term presence of tree species but not chemical diversity affects litter mixture effects on decomposition in a neotropical rainforest. Oecologia 167: 241-252

Hättenschwiler S., Fromin N., Barantal S. (2011) Functional diversity of microbial decomposers and their substrates. Comptes Rendus de Biologies 334: 393-402

Fanin N., Hättenschwiler S., Barantal S., Schimann H., Fromin N. (2011) Does variability in litter quality determine soil microbial respiration in an Amazonian rainforest? Soil Biology & Biochemistry 43: 1014-1022

Fromin N., Pinay G., Montuelle B., Landais D., Ourcival J.-M., Joffre R., & Lensi R. (2010) Impact of seasonal sediment desiccation and rewetting on microbial processes involved in greenhouse gas emissions. Ecohydrology 3:339-348

Humbert S., Tarnawski S., Fromin N., Mallet M.-P., Aragno M., Zopfi J. (2010) Molecular detection of anammox bacteria in terrestrial ecosystems: Distribution and diversity. The ISME Journal 4: 450-454

Tarnawski S., Hamelin J., Jossi M., Aragno M., Fromin N. (2006) Phenotypic structure of Pseudomonas populations is altered under elevated pCO2 in the rhizosphere of perennial grasses. Soil Biology & Biochemistry 38: 1193-1201

Jossi M., Fromin N., Tarnawski S., Gillet F., Kohler F., Aragno M. and Hamelin J. (2006) How does elevated pCO2 modify total and metabolically active bacterial communities in the rhizosphere of two perennial grasses grown under field conditions. FEMS Microbiology and Ecology 55: 339-350

Fromin N., Tarnawski S., Roussel-Delif L., Hamelin J., Baggs E.M., Aragno M. (2005) Nitrogen fertiliser rate affects the frequency of nitrate-dissimilating Pseudomonas spp. in the rhizosphere of Lolium perenne grown under elevated pCO2 (Swiss FACE). Soil Biology & Biochemistry 37: 1962-1965

Roussel-Delif L., Tarnawski S., Hamelin J., Philippot L., Aragno M. et Fromin N. (2005) Frequency and diversity of nitrate reductase genes among nitrate-dissimilating Pseudomonas in the rhizosphere of perennial grasses grown in field conditions. Microbial Ecology 49: 63-72

Morris C.E., Bardin M., Berge O., Frey-Klett P., Fromin N., Girardin H., Guinebretière M.-H., Lebaron P., Thiéry J. et Trousselier M. (2002) Microbial diversity: approaches to experimental design and hypothesis testing in the primary scientific literature from 1975 to 1999. Microbiology and Molecular Biology Reviews 66(4): 592-616

Fromin N., Hamelin J., Tarnawski S., Roesti D., Jourdain-Miserez K., Forestier N., Teyssier-Cuvell S., Gillet F., Aragno M. et Rossi P. (2002) Statistical analysis of denaturing gel electrophoresis (DGE) fingerprinting patterns. Environmental Microbiology 4(11): 634-643

Hamelin J., Fromin N., Teyssier-Cuvelle S., Tarnawski S. et Aragno M. (2002) nifH gene diversity in the bacterial community associated with the rhizosphere of Molinia coerulea, an oligonitrophilic perennial grass. Environmental Microbiology 4(8): 477-481


External links

See my publications on ResearchGate

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