Ecologie comparative des organismes, des communautés et des écosystèmes


Photo Lucie Mahaut 1080x675

Post-doctorate researcher in Ecology and Agriculture

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Research questions

How do different facets of biodiversity affect the functioning and stability of (agro)ecosystems?

What are the roles of plant-plant interactions and functional traits in determining (agro)ecosystem functioning?

What are the drivers of the global distribution of crop species diversity ?

Can plant functional traits predict the multifunctionality of (agro)ecosystems ?

To address these questions, I assemble concepts, theories and tools from functional ecology, biogeography, agronomy and quantitative ecology. I mainly focus on cultivated ecosystems and their associated plant communities, including crop and weed species. My researches cover a range of spatio-temporal scales, from very local (e.g. plant-plant interactions) to global (e.g. global distribution of crop) and pluriannual (e.g. long-term ecosystem stability) scales.


Mahaut, L., Violle, C., Shihan, A., Pélissier, R., Morel, J.-B., de Tombeur, F., Rahajaharilaza, K., Fabre, D., Luquet, D., Hartley, S., Thorne, S. J., Ballini, E., & Fort, F. (2023). Beyond trait distances: Functional distinctiveness captures the outcome of plant competition. Functional Ecology, 37(9), 2399–2412.

Munoz, F., Klausmeier, C. A., Gaüzère, P., Kandlikar, G., Litchman, E., Mouquet, N., Ostling, A., Thuiller, W., Algar, A. C., Auber, A., Cadotte, M. W., Delalandre, L., Denelle, P., Enquist, B. J., Fortunel, C., Grenié, M., Loiseau, N., Mahaut, L., Maire, A., Mouillot, D., Violle, C. & Kraft, N. J. B. (2023). The ecological causes of functional distinctiveness in communities. Ecology Letters, 26(8), 1452–1465.

Renard, D., Mahaut, L., & Noack, F. (2023). Crop diversity buffers the impact of droughts and high temperatures on food production. Environmental Research Letters, 18(4), 045002.

Mahaut, L., Choler, P., Denelle, P., Garnier, E., Thuiller, W., Kattge, J., Lemauviel-Lavenant, S., Lavorel, S., Munoz, F., Renard, D., Serra-Diaz, J. M., Viovy, N., & Violle, C. (2023). Trade-offs and synergies between ecosystem productivity and stability in temperate grasslands. Global Ecology and Biogeography, 32(4), 561–572.

de Tombeur, F., Pélissier, R., Shihan, A., Rahajaharilaza, K., Fort, F., Mahaut, L., Lemoine, T., Thorne, S. J., Hartley, S. E., Luquet, D., Fabre, D., Lambers, H., Morel, J.-B., Ballini, E., & Violle, C. (2023). Growth-defence trade-off in rice: Fast-growing and acquisitive genotypes have lower expression of genes involved in immunity. Journal of Experimental Botany, 74(10), 3094–3103.

Mahaut L., Pironon S., Barnagaud J.Y., Bretagnolle F., Khoury C.K., Mehrabi Z., Milla R., Phillips C., Rieseberg L.H., Violle C., Renard D. (2022). Matches and mismatches between the global distribution of major food crops and climate suitability. Proceedings of the Royal Soeciety-B., 289 (1983)

Mahaut, L., Violle, C., & Renard, D. (2021). Complementary mechanisms stabilize national food production. Scientific Reports, 11(1), 4922.

Mahaut, L., Cheptou, P.-O., Fried, G., Munoz, F., Storkey, J., Vasseur, F., Violle, C., & Bretagnolle, F. (2020). Weeds: Against the Rules? Trends in Plant Science, 25(11), 1107–1116.

Mahaut, L., Fort, F., Violle, C., & Freschet, G. T. (2020). Multiple facets of diversity effects on plant productivity: Species richness, functional diversity, species identity and intraspecific competition. Functional Ecology, 34(1), 287–298.

Munoz, F., Fried, G., Armengot, L., Bourgeois, B., Bretagnolle, V., Chadoeuf, J., Mahaut, L., Plumejeaud, C., Storkey, J., Violle, C., & Gaba, S. (2020). Ecological Specialization and Rarity of Arable Weeds: Insights from a Comprehensive Survey in France. Plants-Basel, 9(7).

Delphine Renard & Lucie Mahaut (2019). De nouveaux éléments en faveur de la diversification (New evidence in favor of crop diversification). Perspectives Agricoles

Mahaut L., Gaba S., Fried G., 2019. A functional diversity approach of crop sequences reveals that weed diversity and abundance show different responses to environmental variability. Journal of Applied Ecology. 56 (6): 1400-1409. doi: 10.1111/1365-2664.13389

Bourgeois B., Munoz, F., Fried, G., Mahaut, L., Armengot, L., Denelle, P., Storkey, J., Gaba, S., Violle, C., 2019. What makes a weed a weed? A large-scale evaluation of arable weeds through a functional lens. American Journal of Botany.106 (1): 90-100. doi: 10.1002/ajb2.1213

Fried G., Carboni M., Mahaut L., Violle C., 2019. Functional traits modulate plant community responses to alien plant invasion. Perspectives in Plant Ecology Evolution and Systematics. 37: 53-63. doi: 10.1016/j.ppees.2019.02.003

Mahaut L., Fried G., Gaba S. 2018. Patch dynamics and temporal dispersal partly shape annual plant communities in ephemeral habitat patches. Oikos. 127: 147-159. doi: 10.1111/oik.04415

Fried G., Mahaut L., Pinston A., Carboni M., 2018. Abiotic constraints and biotic resistance control the establishment success and abundance of invasive Humulus japonicus in riparian habitats. Biological Invasions. 20 (2): 315-331. doi: 10.1007/s10530-017-1533-y