Intranet

Actualités et séminaires

  • 13 Mar Séminaire
    Des végétaux aux hotspots microbiens du sol : Comment le statut hydrique du sol influence le devenir des matières organiques ?

    L’eau intervient dans les cycles biogéochimiques à plusieurs échelles spatiales, avec des effets contrastés sur la dynamique des matières organiques du sol (MOS).          
    A l’échelle des plantes, la disponibilité en l'eau influence les processus biologiques, tels que la croissance racinaire, l’assimilation ou l’exsudation, modulant les apports de MO vers le sol. Cependant, les processus de décomposition et de stabilisation des MOS se produisent à l'échelle microscopique, où les variations de teneur en eau influencent la cooccurrence de la MOS et des micro-organismes.

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  • 06 Mar Séminaire
    From microscale observation to macroscopic quantification: Linking microbial dynamics and carbon fluxes in inland waters

    Inland waters are major players of the global carbon cycle. Despite their modest surface area on Earth, inland waters show a high biogeochemical reactivity across the land-ocean continuum and account for annual CO2 emissions equivalent to the ocean carbon sink. While such emissions are, for instance, commonly related to an overall prevalence of organic matter mineralization over production, our current understanding of the fine spatial and temporal dynamics of carbon cycling in aquatic systems remains limited.

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  • 01 Mar Séminaire
    Capturing ecosystems inner heterogeneity in global scale ecosystem models

    In the early stage of numerical model development, owing to limited computation capabilities simplified formulation were used to simulate physical processes. Hence, in the 80s and 90s, climate models are structured to simulate atmospheric and oceanic processes at the scale of the Earth system. It is only in the 2000s, that, for instance, ecosystems components have been included in the IPSL- Earth system climate model which has resulted in a continuous increase of model complexity.

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  • 20 Feb Séminaire
    Monitoring (bio)reactive transport in groundwater using geophysics

    Geophysical methods, in particular, spectral induced polarization SIP, capture the changing electrical properties of geologic media as they are modified by biogeochemical reactions. Their unique sensitivity to biogeochemically-induced changes poises non-invasive geophysical approaches at the forefront of novel methodologies that can revolutionize our ability to access the poorly accessible subsurface.

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  • 12 Feb Actualité
    Soutenance HDR de Thomas Thiebault

    Thomas Thiebault présentera son HDR [habilitation à diriger des recherches] le lundi 12 février 2024.
    Titre : "Les produits pharmaceutiques dans les environnements anthropisés, de la mesure de la contamination à l'information sur les usages"

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