[Fungal communities in forest soils under climate change].

Forest fungi are crucial for the function and sustainability of forest ecosystems. This article reviews the current understanding of the biology and ecology of two main fungal guilds in forests: saprotrophic fungi, which decompose plant detritus and soil organic matter, and symbiotic mycorrhizal fungi, which promote tree growth. I will explore the factors influencing the diversity and dynamics of fungal communities in forest soils under climate change conditions. Finally, I briefly discuss research programs aimed at defining the conditions for utilising tree microbiota, particularly mycorrhizal symbionts, in planting and assisted migration projects for forestry species. Controlled mycorrhiza formation allows for the production of young forest seedlings mycorrhized with selected fungal strains, thereby enhancing the mineral and water nutrition of seedlings, stimulating juvenile growth, and increasing resistance to drought and pathogens. It is also used for truffle cultivation and edible mushroom production.