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Fiches pédagogiques produites durant l'atelier « Quand le silence parle » animé par Elga Prayoga au Congrès national des professeurs de français (Amsterdam, 2026)
No full textDoctoralLe recueil rassemble les fiches pédagogiques élaborées durant l’atelier « Quand le silence parle : Enseigner le FLE avec la narration visuelle », animé par Elga Prayoga lors du Congrès national des professeurs de français à Amsterdam (5–6 février 2026). Il présente les différentes propositions conçues par les participant.e.s autour de l’exploitation pédagogique du court métrage sans dialogue et de la narration visuelle
C'était en...mars 1966.: La France quitte le commandement intégré de l'OTAN
No full textInternational audienc
Les transformations numériques de l’action publique,locale : leviers des transitions écologiques des collectivités territoriales ?
No full textInternational audienceDigital and ecological transitions lie at the heart of post-Covid territorial recovery plans and energy sobriety measures in France. While they are sometimes mobilized jointly, the narratives surrounding these two transformations are often developed in parallel—if not in outright opposition. How does local public management coordinate these transition projects at the territorial level? Drawing on exploratory case studies in two medium-sized cities, this article shows that digital transformation does not drive ecological transformation; rather, the digital maturity of a territory is a prerequisite for its ecological transformation.Les transitions numérique et écologique sont au cœur des plans de relance territoriaux post-crise Covid et des dispositifs de sobriété énergétique. S’ils sont parfois mobilisés conjointement, les récits de ces deux transformations sont généralement conduits en parallèle, lorsqu’ils n’entrent pas radicalement en opposition. Comment au niveau des territoires, le management public local articule-t-il ces projets de transition ? À partir d’études de cas exploratoires au sein de deux agglomérations de taille moyenne, cet article montre que la transformation digitale ne mène pas la transformation écologique, mais que la maturité numérique d’un territoire est un préalable à sa mutation écologique
Leaf litter chemistry contributes to shape the chemical footprint of macrodetritivore communities
No full textInternational audienceAddressing the factors underlying community patterns is a crucial endeavor as it contributes to a better understanding of the relationship between biodiversity and ecosystem functioning, as well as the associated ecosystem services. For example, detritivore communities play a major role in decomposition processes and related matter and energy fluxes in ecosystems. However, compared to living plant resources, leaf litter resources are nutritionally poor, with low macroelement concentrations. Although detritivore communities are known to depend on the local leaf litter resources, it remains unclear whether the chemical composition of detritivores depends on the locally available leaf litter. The macroelement composition of detritivores is rarely studied and is seldom compared directly to leaf litter chemical quality. Furthermore, leaf litter elements other than carbon (C), nitrogen (N), and phosphorus (P) are not systematically investigated even though large differences in elements such as calcium (Ca), potassium (K), or magnesium (Mg) can occur among both detritivore taxa and leaf litter types.To investigate whether the chemical composition of macrodetritivore communities depends on leaf litter chemistry, we sampled 24 paired French forests sites that differed in their leaf litter chemical composition. At each site, we quantitatively sampled leaf litter transformers (Diplopoda and Isopoda) to estimate their abundance. For each morphospecies, we measured mean individual body mass and analyzed body concentrations of C, N, P, K, Ca, and Mg (hereafter called chemical traits). We also analyzed the same macroelements in the dominant leaf litter at each site. We examined the detritivore taxonomic diversity, chemical community diversity, biomass, and abundance in communities, and tested whether these parameters were influenced by leaf litter chemistry.Results at the morphospecies level were consistent with the homeostasis hypothesis, indicating no specific physiological adaptation to the chemical composition of their trophic resources. Chemical community diversity (i.e., the FDis index based on all six chemical elements) of detritivores was higher at sites with high-quality leaf litter than at the corresponding low-quality leaf litter sites. Furthermore, community-level concentrations of P and Mg in detritivores were positively influenced by litter P and Mg concentrations, respectively.Although effect sizes were limited, our results suggest that leaf litter chemical composition can influence detritivore chemical composition through shifts in the relative abundance of taxa. Ultimately, this may lead to a closer match between the chemical composition of detritivore communities and that of their resources
Bridging eco-exposome and one health approaches to address emerging infectious diseases through the EMERG project
No full textInternational audienceIntroduction Emerging or re-emerging infectious diseases (EIDs) are being increasingly reported and represent a significant burden on public health and global economies, as exemplified by COVID-19 pandemic. Context Given the current EID importance at the territory level in Nouvelle-Aquitaine (NA, a French southwestern region), we designed a project to address this risk. The EMERG project and consortium (for “Microbial exposome and EID risks: the benefits of a One Health management of zoonotic influenza-related issues and beyond”) aim at deciphering and anticipating EID risks in NA. EMERG project design EMERG is a transdisciplinary network for evaluating and predicting EID risk and zoonotic potential. EMERG focuses on highly pathogenic avian influenza, zoonotic arboviral infections due to West Nile and Usutu viruses, and the burden of microbial multidrug resistance in NA. Investigative approaches were developed considering the exposome extended to animals, namely the eco-exposome and specifically the microbial eco-exposome. It brings together specialists in human, animal and environmental health. EMERG aim is to provide up-to-date and region-specific data on major EID risks and their determinants in NA, thereby facilitating local management and anticipation of threatening events, epizootics, and epidemics. Implications, limitations, and future directions In addition to addressing the multiscale nature of complex ecosystems driving EIDs, this transdisciplinary project supports informed decision-making for an adapted regional (NA) policy and can be integrated into larger (national, international) public health initiatives. While EMERG has several limitations, it represents a practical implementation of the One Health approach and eco-exposome concept, which is essential for preventing future EID risks. Here, we focused on project design and organization, and presented examples to demonstrate EMERG feasibility throughout a case study
Unrevealed prokaryotic diversity in a peridotite massif in an underground mine of New Caledonia
No full textInternational audienceThe microbial diversity in an abandoned mine accessing the Tiebaghi peridotite massif in New Caledonia was studied. The site allowed sampling of alkaline water (pH 8.9-9.9) flowing through fractures, with no contamination from the atmosphere, ensuring optimal gas recovery. Two sampling campaigns collected gas samples, revealing variable gas flux. At one site, no bubbling was observed. At the other site, methane (0.11-1.2 mol%), CO 2 (0.054-0.08 mol%), and O 2 (7.5-18.3 mol%) were present, while H 2 was below detection. Methane showed a biogenic δ 13 C signature of -90‰ vs. vPDB (Vienna Pee dee Belemnite). The physico-chemistry indicated an oligotrophic environment with recent oxic meteoric water. Microbial biofilms, formed by microorganisms in the formation waters, included methanogenic archaea mainly from Methanobacteriaceae, likely responsible for methane production. In this oligotrophic environment, oxic waters supported methanotrophs (Methylococcaceae) and methylotrophs (Methylophilaceae), which may structure community dynamics. The presence of nitrogencycle families such as Nitrosococcaceae and Rhodocyclaceae raises questions, given the apparent depletion of reduced nitrogen compounds. The absence of H 2 suggests it may be consumed by hydrogenotrophic prokaryotes (Methanobacteriaceae, Comamonadaceae), reducing detectable levels. This study is the first to detail microbial diversity in the Tiebaghi massif, offering new insights into peridotite-associated microbial communities
Du raffinement de la cour à l’imaginaire populaire : le paravent coréen aux livres (Ch’aekkŏri)
No full textNational audienc
Genetic structure of sugar kelp in the St. Lawrence Estuary and Gulf (Québec, Canada) Genetic structure of sugar kelp
No full textInternational audienceThe sugar kelp, Saccharina latissima, is cultivated at low scale in Quebec, Canada and current practice involve seeding meiospores or gametophyte stocks onto spools carrying twine and transferring these to a seaweed farm site. As the stocks can originate from locations spanning several hundreds of kilometers from the farm sites, such practices could involve genetic contamination and disrupt local adaptations. Assessing genetic structure can inform of the potential risks associated with these practices. Here we characterized the genetic diversity and structure of S. latissima from locations in the St. Lawrence Estuary and Gulf at both microsatellite loci (308 sporophytes at 22 loci in 16 sites) and genomic markers (228 sporophytes at 6578 single nucleotide polymorphisms (SNP) in 13 sites). Several populations had low heterozygosity values and significant FIS values at microsatellite loci. No genetic structure was found among populations with microsatellite loci but strong genetic structuring was found with the genomic data. Population structure followed a geographic pattern and was congruent with major currents. Individuals from the wild population in the vicinity of the farm site were genetically distinct from the sporophytes on the growing lines that belong to a genetically distinct group. There was no significant genetic differentiation between wild individuals living in proximity of the farm site and another wild population of the same area. Hence aquaculture practices have not resulted in changes in the genetic composition of the wild population at large scale. Our results are important to guide future conservation efforts and for the seaweed farming industry