2026-Now: Researcher – INRAE URZF
2023-2026: Post-doctoral researcher – University of Jyväskylä – Finland
2019-2022: PhD – INRAE EFNO [https://theses.fr/2022ORLE1007] 

Research areas
I am interested in the interactions between invasive species and native communities, focusing on both resistance processes (community invasibility) and the consequences of the arrival and establishment of invasive species on the structure of native communities. Accordingly, my research also extends to a broader scale, examining the invasibility of ecosystems and landscapes. Indeed, upon arrival, an exotic species must traverse multiple habitats, often moving from urban environments toward semi-natural areas.

Previously, I investigated the response of forest communities—specifically saproxylic beetles (during my doctoral research) and birds (during my post-doctoral research)—to various environmental gradients, including forest decline, habitat heterogeneity and amount, as well as habitat and climate changes.

Publications
Exhaustive list : https://j-cours.github.io/publications/

Cours, J., Sallé, A., Larrieu, L., Lopez-Vaamonde, C., Müller, J., Parmain, G., Thorn, S., Roques, A., & Bouget, C. (2025). From forest decline to salvage logging: Cascading impacts on saproxylic beetle diversity (p. 2025.11.28.690817). bioRxiv. https://doi.org/10.1101/2025.11.28.690817

Cours, J., Elo, M., Pithon, J., Triviño, M., Mönkkönen, M., Hagge, J., Lehikoinen, A., & Duflot, R. (2025). Changes in abundance and distribution of European forest bird populations depend on biome, ecological specialisation and traits. Ecography, 2025(7), e07582. https://doi.org/10.1111/ecog.07582

Cours, J., & Duflot, R. (2025). Effects of landscape heterogeneity on bird communities in temperate, boreal, and montane forests – a review. Journal of Avian Biology, 2025(3), e03458. https://doi.org/10.1002/jav.03458

Bouget, C., & Cours, J. (2025). Effects of forest dieback on deadwood patterns: Large scale trends from a cross-analysis of European databases. Journal of Environmental Management, 375, 124315. https://doi.org/10.1016/j.jenvman.2025.124315

Bouget, C., Cours, J., Larrieu, L., Parmain, G., Müller, J., Speckens, V., & Sallé, A. (2024). Trait-Based Response of Deadwood and Tree-Related Microhabitats to Decline in Temperate Lowland and Montane Forests. Ecosystems, 27, 90–105. https://doi.org/10.1007/s10021-023-00875-9

Le Souchu, E., Cours, J., Cochenille, T., Bouget, C., Bankhead-Dronnet, S., Braet, Y., Burguet, P., Gabard, C., Galkowski, C., Gereys, B., Herbrecht, F., Joncour, B., Marhic, E., Michez, D., Buhl, P. N., Noblecourt, T., Notton, D. G., Penigot, W., Rasplus, J.-Y., … Sallé, A. (2024). Responses of the hyper-diverse community of canopy-dwelling Hymenoptera to oak decline. Insect Conservation and Diversity. https://doi.org/10.1111/icad.12708

Cours, J., Bouget, C., Barsoum, N., Horák, J., Le Souchu, E., Leverkus, A. B., Pincebourde, S., Thorn, S., & Sallé, A. (2023). Surviving in Changing Forests: Abiotic Disturbance Legacy Effects on Arthropod Communities of Temperate Forests. Current Forestry Reports. https://doi.org/10.1007/s40725-023-00187-0

Cours, J., Larrieu, L., Sallé, A., & Bouget, C. (2023). Conséquences des coupes sanitaires sur la résilience des écosystèmes forestiers perturbés: Une revue de la littérature. Revue forestière française, 74(2), Article 2. https://doi.org/10.20870/revforfr.2023.7595

Cours, J., Sire, L., Ladet, S., Martin, H., Parmain, G., Larrieu, L., Moliard, C., Lopez-Vaamonde, C., & Bouget, C. (2022). Drought-induced forest dieback increases taxonomic, functional, and phylogenetic diversity of saproxylic beetles at both local and landscape scales. Landscape Ecology. https://doi.org/10.1007/s10980-022-01453-5