Pouzenc S. auteur aut IRD Jolivet C. auteur aut IRD Abraham L. auteur aut IRD Auclerc A. auteur aut IRD Beaucher E. auteur aut IRD Bispo A. auteur aut IRD Bougon N. auteur aut IRD Brand M. auteur aut IRD Carteaux L. auteur aut IRD Chauvin C. auteur aut IRD Cluzeau D. auteur aut IRD Cortet J. auteur aut IRD David J. F. auteur aut IRD Delourme L. auteur aut IRD Gelis T. auteur aut IRD Guillocheau S. auteur aut IRD Imbert C. auteur aut IRD Lévêque A. auteur aut IRD Magne G. auteur aut IRD Henon N. auteur aut IRD Noël F. auteur aut IRD Pérès G. auteur aut IRD Peron M. auteur aut IRD Prunot S. auteur aut IRD Reisdorf P. auteur aut IRD Rose O. auteur aut IRD Roucaute M. auteur aut IRD Versavel Cyril auteur aut IRD Villenave C. auteur aut IRD Vincent Q. auteur aut IRD Hedde M. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Soil biodiversity is fundamental to ecosystem functioning but remains underrepresented in conservation policies and large-scale monitoring. Here, we present RMQS-Biodiversity, a nationwide soil biodiversity survey integrated into the French Soil Quality Monitoring Network (RMQS), and illustrate its potential for soil ecology research. In this pioneer study, we examine three major ecological aspects: (i) how systematic grid-based sampling captures micro-food web patterns using nematode communities, (ii) the spatial turnover of detritivore communities (Collembola, Isopoda, Diplopoda) in response to environmental and geographic gradients, and (iii) the influence of macroecological drivers on predator (Carabidae) morphological traits. Across 69 sites, we identified a few widespread species coexisting with numerous rare taxa, underscoring the value of large-scale surveys for detecting cryptic biodiversity. Nematode indicators revealed high variability in food web structure across land uses, with increased facultative phytophagous nematodes in forests. Isopods and diplopods were strongly structured by dispersal constraints, while springtails exhibited weaker environmental responses, likely due to their higher dispersal capacity. Additionally, sexual size dimorphism in Carabidae varied by habitat, with female-biased dimorphism in closed habitats but no dimorphism in open environments, highlighting habitat stability's role in shaping morphological traits. This study demonstrates the value of multi-taxon, multi-trophic biodiversity assessments in long-term soil monitoring. RMQS-Biodiversity provides a robust framework for soil biodiversity monitoring and conservation, refining bioindicators of soil quality and informing policies such as the EU Soil Monitoring Law. specialized Soil biodiversity monitoring Macroecology Soil invertebrates Bioindicators RMQS FRANCE 074 021 082 217 106609 [12 p.] 2026 0929-1393 https://www.documentation.ird.fr/hor/fdi:010095824 10.1016/j.apsoil.2025.106609 0929-1393 [F B010095824] https://www.documentation.ird.fr/hor/fdi:010095824 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2026-01/010095824.pdf IRD - Base Horizon / Pleins textes 2026-01-14 2026-06-12 fdi:010095824 fre