Résumé
The scientific knowledge produced by academic research can be valued in all sectors of human activity, including private sector. The ROVALTAIN Foundation organized a round-table during its scientific day in 2019. It crossed the points of view of academic scientists and industrial partners, addressing five main topics. The first one concerned the validation of a common definition of the academic research/private partners interface. Then, the group discussed the place for academic expertise in the corporate world; the advantages of involving academic researchers in expertise for the private sector; and the limits of this model. To conclude, the need of a third party, like the ROVALTAIN Foundation, as a catalyzer in building the interface between academic research and private partners has been discussed.
Auteurs, date et publication :
Auteurs Christian Mougin , Peter G. C. Campbell , Michel Couderchet , Patrice Denèfle , Fabrice Martin-Laurent , Philippe Roland , Vera I. Slaveykova , Tatiana Vincent , Delphine Delaunay
Publication : Environmental Science and Pollution Research
Date : 2025
Volume : 28
Issue : 2
Pages : 1283-1286
Catégorie(s)
#BiochemEnv #INRAERésumé
Increases in atmospheric temperature and nutrients from land are thought to be promoting the expansion of harmful cyanobacteria in lakes worldwide, yet to date there has been no quantitative synthesis of long-term trends. To test whether cyanobacteria have increased in abundance over the past ~ 200 years and evaluate the relative influence of potential causal mechanisms, we synthesised 108 highly resolved sedimentary time series and 18 decadal-scale monitoring records from north temperate-subarctic lakes. We demonstrate that: (1) cyanobacteria have increased significantly since c. 1800 CE, (2) they have increased disproportionately relative to other phytoplankton, and (3) cyanobacteria increased more rapidly post c. 1945 CE. Variation among lakes in the rates of increase was explained best by nutrient concentration (phosphorus and nitrogen), and temperature was of secondary importance. Although cyanobacterial biomass has declined in some managed lakes with reduced nutrient influx, the larger spatio-temporal scale of sedimentary records show continued increases in cyanobacteria throughout the north temperate-subarctic regions.
Auteurs, date et publication :
Auteurs Zofia E. Taranu , Irene Gregory-Eaves , Peter R. Leavitt , Lynda Bunting , Teresa Buchaca , Jordi Catalan , Isabelle Domaizon , Piero Guilizzoni , Andrea Lami , Suzanne McGowan , Heather Moorhouse , Giuseppe Morabito , Frances R. Pick , Mark A. Stevenson , Patrick L. Thompson , Rolf D. Vinebrooke , Punidan Jeyasingh
Publication : Ecology Letters
Date : 2025
Volume : 18
Issue : 4
Pages : 375-384
Catégorie(s)
#INRAE #OLARésumé
Phytoplankton is a choice ecological indicator of lake ecological quality. Microalgae composing this biological compartment display a large diversity of morphological, physiological and ecological features, which are useful for understanding the interactions they have with other biotic and abiotic elements. Such kind of information together with classical Utermöhl phytoplankton analyses are useful for lake management and basic science. We present here a reference database of morphological (cell and colony sizes, biovolumes, mobility apparatus, colony formation), functional (functional groups of Reynolds, Padisak and Kruk, zooplankton edibility groups), physiological (trophic capacities) and ecological traits (Brettum index values) of more than 1200 taxa often observed in temperate lakes. This database, maintained since the 70’s until nowadays by the authors of this paper is now realized open access in Zenodo (https://zenodo.org; DOI: 10.5281/zenodo.1164834) and also as supplementary material on the journal website. The paper presents an overview of its content.
Auteurs, date et publication :
Auteurs Frédéric Rimet , Jean-Claude Druart
Publication : Annales de Limnologie - International Journal of Limnology
Date : 2025
Volume : 54
Pages : 18
Catégorie(s)
#INRAE #OLARésumé
Structural equation models (SEM) are increasingly used in ecology as multivariate analysis that can represent theoretical variables and address complex sets of hypotheses. Here we demonstrate the interest of SEM in ecotoxicology, more precisely to test the three-step concept of metal bioavailability to earthworms. The SEM modeled the three-step causal chain between environmental availability, environmental bioavailability and toxicological bioavailability. In the model, each step is an unmeasured (latent) variable reflected by several observed variables. In an exposure experiment designed specifically to test this SEM for Cd, Pb and Zn, Aporrectodea caliginosa was exposed to 31 agricultural field-contaminated soils. Chemical and biological measurements used included CaC12-extractable metal concentrations in soils, free ion concentration in soil solution as predicted by a geochemical model, dissolved metal concentration as predicted by a semi-mechanistic model, internal metal concentrations in total earthworms and in subcellular fractions, and several biomarkers. The observations verified the causal definition of Cd and Pb bioavailability in the SEM, but not for Zn. Several indicators consistently reflected the hypothetical causal definition and could thus be pertinent measurements of Cd and Pb bioavailability to earthworm in field-contaminated soils. SEM highlights that the metals present in the soil solution and easily extractable are not the main source of available metals for earthworms. This study further highlights SEM as a powerful tool that can handle natural ecosystem complexity, thus participating to the paradigm change in ecotoxicology from a bottom-up to a top-down approach.
Auteurs, date et publication :
Auteurs Léa Beaumelle , Denis Vile , Isabelle Lamy , Franck Vandenbulcke , Frédéric Gimbert , Mickaël Hedde
Publication : Science of The Total Environment
Date : 2016
Volume : 569-570
Pages : 961-972
Catégorie(s)
#ANR-Citation #BiochemEnv #INRAE #PRORésumé
For forest ecosystems, the relationship between root biomass, root growth and soil nitrification is still debated. Following repeated findings of significant differences in soil nitrification beneath comparable stands at the Breuil experimental site, a reciprocal soil exchange experiment combining high (H)- and low (L)-nitrifying stands was conducted to highlight the effect of tree root colonization on the control of nitrification. Soil percent nitrification and fine root biomass were measured in undisturbed and in transplanted soil cores after 16 and 28 months. In undisturbed soils, the fine root biomass varied by tree species and explained only 14% of the variation in percent nitrification. In transplanted soil cores, percent nitrification converged, at different rates, towards values close to those measured in the undisturbed soil at the receptor stands. On the one hand, percent nitrification increased rapidly in soil cores from L transferred to H, while soil core colonization by roots remained low during the study period. Soil cores might have been colonized by active nitrifiers from their new environment, or/and the activity of the nitrifiers originally present was less suppressed by root activity in their new environment. On the other hand, percent nitrification decreased progressively in soil cores from H transferred to L as root colonization increased. This suggests that root colonization reduced nitrifier population and activity. Our findings suggest that the often-reported influence of forest species on soil nitrification is probably multifactorial but the tree root colonization contributes.
Auteurs, date et publication :
Auteurs K. S. Andrianarisoa , B. Zeller , J. Ranger , S. Bienaime , E. Dambrine
Publication : Soild Use and Management
Date : 2017
Volume : 33
Issue : 1
Pages : 45-53
Catégorie(s)
#FORET Breuil #INRAERésumé
Mineral amendment (i.e. calcium, phosphorous, potassium and/or magnesium) is a management practice used in forestry to improve nutrient availability and recover soil fertility, especially in nutrient-poor forest ecosystems. However, whether this amendment can lead to modifications of the soil characteristics and an improvement in tree growth, and its impact on the soil bacterial communities, especially the mineral weathering bacterial communities, remains poorly documented. In this study, we investigated the short-term impact of a mineral amendment on the taxonomic and functional structure of the mineral weathering bacterial communities. To do this, a plantation of four-year old oak (Quercus petraea) trees amended with or without dolomite [CaMg(CO3)(2)] was established in the experimental forest site of Breuil-Chenue, which is characterized by an acidic soil and a low availability of calcium and magnesium. Three years after amendment, soil samples were used to isolate bacteria as well as to determine the soil characteristics and the metabolic potentials of these soil microbial communities. Based on a bioassay for quantifying the solubilisation of inorganic phosphorous, we demonstrate that the bacterial isolates coming from the non-amended bulk soil were significantly more efficient than those from the amended bulk soil. No difference was observed between the bacterial isolates coming from the amended and non-amended rhizospheres. Notably, the taxonomic analyses revealed a dominance of bacterial isolates belonging to the Burkholderia genus in both samples. Overall, our results suggest that the bioavailability of nutritive cations into soil impacts the distribution and the efficacy of mineral weathering bacterial communities coming from the soil but not those coming from the rhizosphere. (C) 2013 Institut Pasteur. Published by Elsevier Masson SAS. All rights reserved.
Auteurs, date et publication :
Auteurs C. Lepleux , S. Uroz , C. Collignon , J. -L. Churin , M. -P. Turpault , P. Frey-Klett
Publication : Research in Microbiology
Date : 2013
Volume : 164
Issue : 7
Pages : 729-739
Catégorie(s)
#FORET Breuil #INRAEAuteurs, date et publication :
Auteurs J. Jimenez , Q. Aemig , N. Doussiet , J.P. Steyer , S. Houot , D. Patureau
Publication : Bioresource Technology
Date : 2025
Volume : 194
Pages : 344-353
Catégorie(s)
#INRAE #PRORésumé
The modelling community has identified challenges for the integration and assessment of lake models due to the diversity of modelling approaches and lakes. In this study, we develop and assess a onedimensional lake model and apply it to 32 lakes from a global observatory network. The data set included lakes over broad ranges in latitude, climatic zones, size, residence time, mixing regime and trophic level. Model performance was evaluated using several error assessment metrics, and a sensitivity analysis was conducted for nine parameters that governed the surface heat exchange and mixing efficiency. There was low correlation between input data uncertainty and model performance and predictions of temperature were less sensitive to model parameters than prediction of thermocline depth and Schmidt stability. The study provides guidance to where the general model approach and associated assumptions work, and cases where adjustments to model parameterisations and/or structure are required.
Auteurs, date et publication :
Auteurs Louise C. Bruce , Marieke A. Frassl , George B. Arhonditsis , Gideon Gal , David P. Hamilton , Paul C. Hanson , Amy L. Hetherington , John M. Melack , Jordan S. Read , Karsten Rinke , Anna Rigosi , Dennis Trolle , Luke Winslow , Rita Adrian , Ana I. Ayala , Serghei A. Bocaniov , Bertram Boehrer , Casper Boon , Justin D. Brookes , Thomas Bueche
Publication : Environmental Modelling & Software
Date : 2025
Volume : 102
Pages : 274-291
Catégorie(s)
#INRAE #OLARésumé
Crop models contain a number of genotype-dependent parameters, which need to be estimated for each genotype. This is a major difficulty in crop modeling. We propose a hybrid method for adapting a crop model to new genotypes. The genotype-dependent parameters of the model could be obtained by phenotyping (or gene-based modeling). Then, field data (e.g., from variety trials) could be used to provide a simple empirical correction to the model, of the form a + b × an environmental variable. This approach combines the advantages of phenotyping, namely that the genotype-specific parameters have a clear meaning and are comparable between genotypes, and the advantages of fitting the model to field data, namely that the corrected model is adapted to a specific target population. It has the advantage of being very simple to apply and furthermore gives useful information as to which environmental variables are not fully accounted for in the initial model. In this study, this empirical correction is applied to the SUNFLO crop model for sunflower (Helianthus annuus L.), using field data from a multi-environment trial network. The empirical correction reduced mean squared error, on average, by 54% for prediction of yield and by 26% for prediction of oil content, compared with the initial model. Most of the improvement came from eliminating bias, with some further improvement from the environmental term in the regression.
Auteurs, date et publication :
Auteurs Pierre Casadebaig , Philippe Debaeke , Daniel Wallach
Publication : Crop Science
Date : 2025
Volume : 60
Issue : 2
Pages : 709-720
Catégorie(s)
#INRAE #RecordAuteurs, date et publication :
Auteurs A. Goulas , C.S. Haudin , V. Bergheaud , V. Dumeny , S. Ferhi , S. Nélieu , M. Bourdat-Deschamps , P. Benoit
Publication : Chemosphere
Date : 2025
Volume : 165
Pages : 460-469