Auteurs, date et publication :
Auteurs Caroline Le Maréchal , Adeline Huneau , Sébastien Solanas , Amandine Avouac , Léa Jambou , Apolline Roux , Line Boulonne , Sandra Rouxel , Claudy Jolivet , Typhaine Poezevara , Marianne Chemaly , Alain Hartmann
Publication : Microbiology Spectrum
Date : 2025
Volume : 13
Issue : 8
Pages : e00114-25
Catégorie(s)
#Genosol #INRAERésumé
Global warming impacts soil microbial communities, which are central to many ecosystem functions and services. However, while the effects of warming under contrasting soil management on topsoil communities are well-documented, their influence on microbial communities and their networks in deeper soil layers (> 30 cm) remains largely unexplored. This study aims to investigate these effects in the short-term in an agricultural Cambisol under cropland and grassland management.
Auteurs, date et publication :
Auteurs Md. Zulfikar Khan , Pierre-Alain Maron , Samuel Dequiedt , Cornelia Rumpel , Abad Chabbi
Publication : Journal of Soil Science and Plant Nutrition
Date : 2025
Catégorie(s)
#Genosol #INRAERésumé
Urban agriculture plays a key role in urban ecosystems functionality and resilience, and can take many forms: allotment gardens, community garden or urban microfarms. In the latest, urban microfarms can be developed at the soil surface but also on rooftops because of the scarcity of space. The soils of these urban microfarms, either pseudo-natural or Technosol, are also characterised by a high variability in their biological and geochemical properties, influencing their ability to support soil biodiversity. This study investigated the biodiversity (taxonomic richness and abundance) of microorganisms, mesofauna, macrofauna and plant and linked it to soil geochemical parameters in urban microfarm soils. Biological and soil samplings and vegetation identifications were conducted in 12 plots of urban microfarms of the Paris region (France), including 7 plots on the ground level and 5 on rooftops, with characterisation of microbial, collembolan, macrofauna and plant communities and abiotic parameters. There was a very high intra- and inter-site variability within urban microfarms soils, regardless of the taxonomic group considered. Ground microfarms appeared to favour abundance and diversity of spontaneous plants and macrofauna, while rooftop microfarms seemed to harbour more microorganisms (especially bacteria) and Collembola, which were also more diverse, in relation with the characteristics of the two types of soil. Based on our findings we share recommendation for future studies supporting the development of urban agriculture.
Auteurs, date et publication :
Auteurs Sophie Joimel , Baptiste Grard , Claire Chenu , Apolline Auclerc , Morgane Bernard , Samuel Mondy , Lucile Dewulf , Mélanie Lelièvre , Fatima El Mekdad , Laure Vieublé Gonod
Publication : European Journal of Soil Science
Date : 2026
Volume : 77
Issue : 2
Pages : e70260
Catégorie(s)
#Genosol #INRAERésumé
Developing cropping systems that promote soil biodiversity is crucial to guarantee sustainable production in the face of global changes. However, effects of alternative systems on soil organisms remain largely unknown. For two consecutive years, soil microorganisms, mesofauna and macrofauna were collected in 21 fields under conventional, organic or conservation agriculture, either long-established or transitioning, ranging in tillage intensity, pesticide treatment intensity and organic inputs. Effect sizes were calculated to compare taxa density or diversity between alternative and conventional systems, and between transitioning and long-established systems. Piecewise structural equation modeling was conducted to assess relations between practices and soil trophic groups. Long-established conservation systems had positive effects on various taxa densities (Collembola, Coleoptera larvae, Gastropoda) and earthworm biomass, but negative effects on fungal richness. Recent conservation systems had positive effects on Coleoptera larvae density, earthworm density and biomass, and negative effects on fungal abundance (10–20 cm depth). Recent organic systems benefited earthworm density and biomass, and fungal diversity. Transitions from conservation to organic decreased Araneae density and influenced microbial and Collembola diversity. Conservation, and to a lesser extent organic systems, had overall positive effects on soil organism density. Tillage intensity showed the strongest negative effect on soil organisms with cascading effects through the soil food web, while organic matter inputs promoted bacteria and macrofauna detritivore densities. Mesofauna detritivores played a central role in studied soil food webs. Overall, conservation and organic agriculture benefit different taxa, and reduced tillage could offer the greatest benefits by promoting soil taxa and their interactions.
Auteurs, date et publication :
Auteurs Juliette Chassain , Sophie Joimel , Tania De Almeida , Laure Vieublé Gonod
Publication : Applied Soil Ecology
Date : 2026
Volume : 218
Pages : 106760
Catégorie(s)
#Genosol #INRAERésumé
Mass selection is increasingly promoted in viticulture to enhance resilience by restoring intra-varietal diversity, yet its effects on the structure a...
Auteurs, date et publication :
Auteurs Solène Lemichez , Maria Bernard , Véronique Chable
Publication : Microorganisms
Date : 2026
Volume : 14
Issue : 3
Catégorie(s)
#Genosol #INRAEAuteurs, date et publication :
Auteurs
Date : 1970
Catégorie(s)
#Genosol #INRAERésumé
Fin de vie des résidus de polymères (bio)dégradables - BIOMALEG
Auteurs, date et publication :
Auteurs
Date : 1970
Catégorie(s)
#Genosol #INRAEAuteurs, date et publication :
Auteurs S. Dequiedt , N. P. A. Saby , M. Lelievre , C. Jolivet , J. Thioulouse , B. Toutain , D. Arrouays , A. Bispo , P. Lemanceau , L. Ranjard
Publication : Global Ecology and Biogeography
Date : 2025
Volume : 20
Issue : 4
Pages : 641-652
Catégorie(s)
#Genosol #INRAERésumé
Fungi constitute an important group in soil biological diversity and functioning. However, characterization and knowledge of fungal communities is hampered because few primer sets are available to quantify fungal abundance by real-time quantitative PCR (real-time Q-PCR). The aim in this study was to quantify fungal abundance in soils by incorporating, into a real-time Q-PCR using the SYBRGreen® method, a primer set already used to study the genetic structure of soil fungal communities. To satisfy the real-time Q-PCR requirements to enhance the accuracy and reproducibility of the detection technique, this study focused on the 18S rRNA gene conserved regions. These regions are little affected by length polymorphism and may provide sufficiently small targets, a crucial criterion for enhancing accuracy and reproducibility of the detection technique. An in silico analysis of 33 primer sets targeting the 18S rRNA gene was performed to select the primer set with the best potential for real-time Q-PCR: short amplicon length; good fungal specificity and coverage. The best consensus between specificity, coverage and amplicon length among the 33 sets tested was the primer set FR1 / FF390. This in silico analysis of the specificity of FR1 / FF390 also provided additional information to the previously published analysis on this primer set. The specificity of the primer set FR1 / FF390 for Fungi was validated in vitro by cloning - sequencing the amplicons obtained from a real time Q-PCR assay performed on five independent soil samples. This assay was also used to evaluate the sensitivity and reproducibility of the method. Finally, fungal abundance in samples from 24 soils with contrasting physico-chemical and environmental characteristics was examined and ranked to determine the importance of soil texture, organic carbon content, C∶N ratio and land use in determining fungal abundance in soils.
Auteurs, date et publication :
Auteurs Nicolas Chemidlin Prévost-Bouré , Richard Christen , Samuel Dequiedt , Christophe Mougel , Mélanie Lelièvre , Claudy Jolivet , Hamid Reza Shahbazkia , Laure Guillou , Dominique Arrouays , Lionel Ranjard
Publication : Plos One
Date : 2011
Volume : 6
Issue : 9
Pages : e24166
Catégorie(s)
#Genosol #INRAERésumé
Spatial scaling and determinism of the wide-scale distribution of macroorganism diversity has been largely demonstrated over a century. For microorganisms, and especially for soil bacteria, this fundamental question requires more thorough investigation, as little information has been reported to date. Here by applying the taxa–area relationship to the largest spatially explicit soil sampling available in France (2,085 soils, area covered ~5.3 × 105 km2) and developing an innovative evaluation of the habitat–area relationship, we show that the turnover rate of bacterial diversity in soils on a wide scale is highly significant and strongly correlated with the turnover rate of soil habitat. As the diversity of micro- and macroorganisms appears to be driven by similar processes (dispersal and selection), maintaining diverse and spatially structured habitats is essential for soil biological patrimony and the resulting ecosystem services.
Auteurs, date et publication :
Auteurs L. Ranjard , S. Dequiedt , N. Chemidlin Prévost-Bouré , J. Thioulouse , N. P. A. Saby , M. Lelievre , P. A. Maron , F. E. R. Morin , A. Bispo , C. Jolivet , D. Arrouays , P. Lemanceau
Publication : Nature Communications
Date : 2013
Volume : 4
Pages : 1434